Common Weakness Enumeration

CWE-59

Allowed

Improper Link Resolution Before File Access ('Link Following')

Abstraction: Base · Status: Draft

API response cwe.mitre.org

The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.

2336 vulnerabilities reference this CWE, most recent first.

GHSA-8QWF-CXW2-23H9

Vulnerability from github – Published: 2022-05-01 23:57 – Updated: 2022-05-01 23:57
VLAI
Details

The save function in br/prefmanager.d in projectl 1.001 creates a projectL.prf file in the current working directory, which allows local users to overwrite arbitrary files via a symlink attack.

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{
  "affected": [],
  "aliases": [
    "CVE-2008-3216"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-59"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2008-07-18T16:41:00Z",
    "severity": "MODERATE"
  },
  "details": "The save function in br/prefmanager.d in projectl 1.001 creates a projectL.prf file in the current working directory, which allows local users to overwrite arbitrary files via a symlink attack.",
  "id": "GHSA-8qwf-cxw2-23h9",
  "modified": "2022-05-01T23:57:55Z",
  "published": "2022-05-01T23:57:55Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2008-3216"
    },
    {
      "type": "WEB",
      "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/44059"
    },
    {
      "type": "WEB",
      "url": "http://bugs.debian.org/489988"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2008/07/09/8"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

GHSA-8QXF-7FXX-743X

Vulnerability from github – Published: 2026-06-22 21:31 – Updated: 2026-06-22 21:31
VLAI
Details

Dell Wyse Management Suite (WMS), versions prior to WMS 2605, contain an Improper Link Resolution Before File Access vulnerability. A low privileged attacker with local access could potentially exploit this vulnerability, leading to Unauthorized access.

Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2026-44274"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-59"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-22T20:16:29Z",
    "severity": "HIGH"
  },
  "details": "Dell Wyse Management Suite (WMS), versions prior to WMS 2605, contain an Improper Link Resolution Before File Access vulnerability. A low privileged attacker with local access could potentially exploit this vulnerability, leading to Unauthorized access.",
  "id": "GHSA-8qxf-7fxx-743x",
  "modified": "2026-06-22T21:31:00Z",
  "published": "2026-06-22T21:31:00Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-44274"
    },
    {
      "type": "WEB",
      "url": "https://www.dell.com/support/kbdoc/en-us/000472001/dsa-2026-247"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-8RMQ-JWCC-5RG4

Vulnerability from github – Published: 2022-05-17 03:03 – Updated: 2025-04-20 03:31
VLAI
Details

mail.local in NetBSD versions 6.0 through 6.0.6, 6.1 through 6.1.5, and 7.0 allows local users to change ownership of or append data to arbitrary files on the target system via a symlink attack on the user mailbox.

Severity
7.8 (High)
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2016-6253"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-59"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2017-01-20T15:59:00Z",
    "severity": "HIGH"
  },
  "details": "mail.local in NetBSD versions 6.0 through 6.0.6, 6.1 through 6.1.5, and 7.0 allows local users to change ownership of or append data to arbitrary files on the target system via a symlink attack on the user mailbox.",
  "id": "GHSA-8rmq-jwcc-5rg4",
  "modified": "2025-04-20T03:31:23Z",
  "published": "2022-05-17T03:03:11Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2016-6253"
    },
    {
      "type": "WEB",
      "url": "https://www.exploit-db.com/exploits/40141"
    },
    {
      "type": "WEB",
      "url": "https://www.exploit-db.com/exploits/40385"
    },
    {
      "type": "WEB",
      "url": "http://akat1.pl/?id=2"
    },
    {
      "type": "WEB",
      "url": "http://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2016-006.txt.asc"
    },
    {
      "type": "WEB",
      "url": "http://packetstormsecurity.com/files/138021/NetBSD-mail.local-8-Local-Root.html"
    },
    {
      "type": "WEB",
      "url": "http://www.rapid7.com/db/modules/exploit/unix/local/netbsd_mail_local"
    },
    {
      "type": "WEB",
      "url": "http://www.securityfocus.com/bid/92101"
    },
    {
      "type": "WEB",
      "url": "http://www.securitytracker.com/id/1036429"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-8V4R-W49G-JC9W

Vulnerability from github – Published: 2026-06-01 21:30 – Updated: 2026-06-01 21:30
VLAI
Details

CodexBar prior to 0.32.0 contains an insecure temporary file handling vulnerability that allows local attackers to access sensitive credentials or tamper with build artifacts by exploiting predictable file paths in the release notarization workflow. Attackers with access to the same host can read the App Store Connect API key written to a fixed path, pre-create files or symbolic links at predictable locations to redirect writes to attacker-controlled destinations, or tamper with notarization archives before submission.

Severity
7.1 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
7.2 (High)
CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
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{
  "affected": [],
  "aliases": [
    "CVE-2026-49135"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-59"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-01T21:16:46Z",
    "severity": "HIGH"
  },
  "details": "CodexBar prior to 0.32.0 contains an insecure temporary file handling vulnerability that allows local attackers to access sensitive credentials or tamper with build artifacts by exploiting predictable file paths in the release notarization workflow. Attackers with access to the same host can read the App Store Connect API key written to a fixed path, pre-create files or symbolic links at predictable locations to redirect writes to attacker-controlled destinations, or tamper with notarization archives before submission.",
  "id": "GHSA-8v4r-w49g-jc9w",
  "modified": "2026-06-01T21:30:44Z",
  "published": "2026-06-01T21:30:44Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-49135"
    },
    {
      "type": "WEB",
      "url": "https://github.com/steipete/CodexBar/pull/1228"
    },
    {
      "type": "WEB",
      "url": "https://github.com/steipete/CodexBar/commit/e7d932616508cee43ea9bcc63c269b14698de655"
    },
    {
      "type": "WEB",
      "url": "https://github.com/steipete/CodexBar/releases/tag/v0.32.0"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/codexbar-insecure-temporary-file-handling-in-notarization-workflow"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

GHSA-8VGW-M5FH-HWG3

Vulnerability from github – Published: 2026-08-11 00:31 – Updated: 2026-08-11 00:31
VLAI
Details

The affected TP-Link Aginet devices do not properly validate symbolic links created on external USB storage devices. By placing a crafted symbolic link on supported storage media, an attacker may cause the system to resolve the link.

Successful exploitation may allow unauthorized read access to sensitive files within the device filesystem.

Severity
5.1 (Medium)
CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
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{
  "affected": [],
  "aliases": [
    "CVE-2025-30240"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-59"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-10T23:16:50Z",
    "severity": "MODERATE"
  },
  "details": "The affected TP-Link Aginet devices do not properly validate symbolic links created on external USB storage\ndevices. By placing a crafted symbolic link on supported storage media, an\nattacker may cause the system to resolve the link.\n\n\n\n\n\n\n\n\n\nSuccessful\nexploitation may allow unauthorized read access to sensitive files within the\ndevice filesystem.",
  "id": "GHSA-8vgw-m5fh-hwg3",
  "modified": "2026-08-11T00:31:12Z",
  "published": "2026-08-11T00:31:12Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-30240"
    },
    {
      "type": "WEB",
      "url": "https://www.tp-link.com/us/support/faq/5239"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

GHSA-8VR5-672V-2M5F

Vulnerability from github – Published: 2022-05-17 02:18 – Updated: 2022-05-17 02:18
VLAI
Details

mafft-homologs in mafft 6.240 allows local users to overwrite arbitrary files via a symlink attack on (1) /tmp/_vf#?????, (2) /tmp/_if#?????, (3) /tmp/_pf#?????, (4) /tmp/_af#?????, (5) /tmp/_rid#?????, (6) /tmp/_res#?????, (7) /tmp/_q#?????, and (8) /tmp/_bf#????? temporary files.

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{
  "affected": [],
  "aliases": [
    "CVE-2008-4971"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-59"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2008-11-06T15:55:00Z",
    "severity": "MODERATE"
  },
  "details": "mafft-homologs in mafft 6.240 allows local users to overwrite arbitrary files via a symlink attack on (1) /tmp/_vf#?????, (2) /tmp/_if#?????, (3) /tmp/_pf#?????, (4) /tmp/_af#?????, (5) /tmp/_rid#?????, (6) /tmp/_res#?????, (7) /tmp/_q#?????, and (8) /tmp/_bf#????? temporary files.",
  "id": "GHSA-8vr5-672v-2m5f",
  "modified": "2022-05-17T02:18:31Z",
  "published": "2022-05-17T02:18:31Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2008-4971"
    },
    {
      "type": "WEB",
      "url": "https://bugs.gentoo.org/show_bug.cgi?id=235770"
    },
    {
      "type": "WEB",
      "url": "https://bugs.gentoo.org/show_bug.cgi?id=235804"
    },
    {
      "type": "WEB",
      "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/44825"
    },
    {
      "type": "WEB",
      "url": "http://bugs.debian.org/496366"
    },
    {
      "type": "WEB",
      "url": "http://dev.gentoo.org/~rbu/security/debiantemp/mafft"
    },
    {
      "type": "WEB",
      "url": "http://uvw.ru/report.lenny.txt"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2008/10/30/2"
    },
    {
      "type": "WEB",
      "url": "http://www.securityfocus.com/bid/30915"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

GHSA-8VVG-J3G5-33RH

Vulnerability from github – Published: 2025-09-19 21:31 – Updated: 2025-09-29 21:30
VLAI
Details

Vasion Print (formerly PrinterLogic) Virtual Appliance Host and Application (Windows client deployments) contain an insecure temporary-file handling vulnerability in the PrinterInstallerClient components. The software creates files as NT AUTHORITY\SYSTEM inside a directory under the control of the local user (C:\Users\%USER%\AppData\Local\Temp). An attacker who can place symbolic links or otherwise influence filenames in that directory can cause the service to follow the link and write to arbitrary filesystem locations as SYSTEM. This allows a local, unprivileged user to overwrite or create files as SYSTEM, leading to local privilege escalation and the ability to modify configuration files, replace or inject binaries, or otherwise compromise confidentiality, integrity, and availability of the system. NOTE: This vulnerability has been addressed, but an affected version range is not yet fully determined. This record will be updated when the vendor provides confirmed version information.

Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.5 (High)
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
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{
  "affected": [],
  "aliases": [
    "CVE-2025-34194"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-59"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-09-19T19:15:39Z",
    "severity": "HIGH"
  },
  "details": "Vasion Print (formerly PrinterLogic) Virtual Appliance Host and Application (Windows client deployments) contain an insecure temporary-file handling vulnerability in the PrinterInstallerClient components. The software creates files as NT AUTHORITY\\SYSTEM inside a directory under the control of the local user (C:\\Users\\%USER%\\AppData\\Local\\Temp\\). An attacker who can place symbolic links or otherwise influence filenames in that directory can cause the service to follow the link and write to arbitrary filesystem locations as SYSTEM. This allows a local, unprivileged user to overwrite or create files as SYSTEM, leading to local privilege escalation and the ability to modify configuration files, replace or inject binaries, or otherwise compromise confidentiality, integrity, and availability of the system.\u00a0NOTE: This vulnerability has been addressed, but an affected version range is not yet fully determined. This record will be updated when the vendor provides confirmed version information.",
  "id": "GHSA-8vvg-j3g5-33rh",
  "modified": "2025-09-29T21:30:20Z",
  "published": "2025-09-19T21:31:18Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-34194"
    },
    {
      "type": "WEB",
      "url": "https://help.printerlogic.com/saas/Print/Security/Security-Bulletins.htm"
    },
    {
      "type": "WEB",
      "url": "https://help.printerlogic.com/va/Print/Security/Security-Bulletins.htm"
    },
    {
      "type": "WEB",
      "url": "https://pierrekim.github.io/blog/2025-04-08-vasion-printerlogic-83-vulnerabilities.html#win-lpe-02"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/vasion-print-printerlogic-lpe-via-insecure-temporary-file-handling"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

GHSA-8W66-9HVH-6JFX

Vulnerability from github – Published: 2022-05-14 01:05 – Updated: 2022-05-14 01:05
VLAI
Details

In supportutils, before version 3.1-5.7.1 and if pacemaker is installed on the system, an unprivileged user could have overwritten arbitrary files in the directory that is used by supportutils to collect the log files.

Severity
4.7 (Medium)
CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N
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{
  "affected": [],
  "aliases": [
    "CVE-2018-19638"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-59"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2019-03-05T16:29:00Z",
    "severity": "MODERATE"
  },
  "details": "In supportutils, before version 3.1-5.7.1 and if pacemaker is installed on the system, an unprivileged user could have overwritten arbitrary files in the directory that is used by supportutils to collect the log files.",
  "id": "GHSA-8w66-9hvh-6jfx",
  "modified": "2022-05-14T01:05:26Z",
  "published": "2022-05-14T01:05:26Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2018-19638"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.suse.com/show_bug.cgi?id=1118460"
    },
    {
      "type": "WEB",
      "url": "http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00018.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-8W8G-WQ8H-FQ33

Vulnerability from github – Published: 2026-10-02 18:53 – Updated: 2026-10-02 18:53
VLAI
Summary
Dulwich: Symlink write-through in checkout(paths=[]) via raw os.open bypasses all symlink protections
Details

Summary

Dulwich's porcelain.checkout(paths=[...]) code path writes files using raw os.open(file_path, O_WRONLY|O_CREAT|O_TRUNC, mode) followed by f.write(obj.data). This code path does NOT call build_file_from_blob() at all, completely bypassing any symlink protections (including the unreleased d09f8af fix). os.open without O_NOFOLLOW follows symlinks at both the target file and intermediate directories, allowing arbitrary file writes.

Root Cause

At dulwich/porcelain/__init__.py:5661-5675, the checkout(paths=[...]) implementation:

file_path = _checked_worktree_path(r, path)
os.makedirs(os.path.dirname(file_path), exist_ok=True)
flags = os.O_WRONLY | os.O_CREAT | os.O_TRUNC
with os.fdopen(os.open(file_path, flags, mode), "wb") as f:
    f.write(obj.data)

_checked_worktree_path() (line 601-631) only performs name validation — checking that the path doesn't start with / or \\ and that components pass INVALID_DOTNAMES checks. It performs zero filesystem symlink detection.

Impact

An attacker can craft a malicious repository that, when a victim clones it and runs checkout(paths=[...]), writes attacker-controlled content (with attacker-controlled permissions) to any filesystem location accessible to the user. Writing to .git/hooks/post-checkout achieves RCE on the next git checkout.

Attack Scenario

  1. Attacker creates a repository where HEAD has trigger as a symlink (mode 120000, content ../../.git/hooks/post-checkout), and tag v1.0 has trigger as an executable file (mode 100755, content #!/bin/sh\nmalicious_payload)
  2. Victim clones the repository — worktree has trigger → ../../.git/hooks/post-checkout (a symlink)
  3. Victim runs porcelain.checkout(repo, target="v1.0", paths=["trigger"]) to restore a specific file from a tag
  4. _checked_worktree_path(r, "trigger") passes — name validation only, no symlink check
  5. os.open("trigger", O_WRONLY|O_CREAT|O_TRUNC, 0o755) follows the symlink → opens .git/hooks/post-checkout for writing
  6. f.write(obj.data) writes the malicious payload to the hook
  7. Next checkout operation triggers the hook → RCE

Suggested Fix

Replace the raw os.open path with a call to build_file_from_blob (once that function is hardened against intermediate symlinks), or add explicit symlink detection: resolve the path with os.path.realpath() and verify it stays within the worktree root before opening.

Reported by zx (Jace)

Severity
8.6 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
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{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 1.2.7"
      },
      "package": {
        "ecosystem": "PyPI",
        "name": "dulwich"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.24.0"
            },
            {
              "fixed": "1.2.8"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [
      "CWE-59",
      "CWE-61"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-10-02T18:53:35Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "## Summary\n\nDulwich\u0027s `porcelain.checkout(paths=[...])` code path writes files using raw `os.open(file_path, O_WRONLY|O_CREAT|O_TRUNC, mode)` followed by `f.write(obj.data)`. This code path does NOT call `build_file_from_blob()` at all, completely bypassing any symlink protections (including the unreleased d09f8af fix). `os.open` without `O_NOFOLLOW` follows symlinks at both the target file and intermediate directories, allowing arbitrary file writes.\n\n## Root Cause\n\nAt `dulwich/porcelain/__init__.py:5661-5675`, the `checkout(paths=[...])` implementation:\n\n```python\nfile_path = _checked_worktree_path(r, path)\nos.makedirs(os.path.dirname(file_path), exist_ok=True)\nflags = os.O_WRONLY | os.O_CREAT | os.O_TRUNC\nwith os.fdopen(os.open(file_path, flags, mode), \"wb\") as f:\n    f.write(obj.data)\n```\n\n`_checked_worktree_path()` (line 601-631) only performs name validation \u2014 checking that the path doesn\u0027t start with `/` or `\\\\` and that components pass `INVALID_DOTNAMES` checks. It performs zero filesystem symlink detection.\n\n## Impact\n\nAn attacker can craft a malicious repository that, when a victim clones it and runs `checkout(paths=[...])`, writes attacker-controlled content (with attacker-controlled permissions) to any filesystem location accessible to the user. Writing to `.git/hooks/post-checkout` achieves RCE on the next git checkout.\n\n## Attack Scenario\n\n1. Attacker creates a repository where HEAD has `trigger` as a symlink (mode 120000, content `../../.git/hooks/post-checkout`), and tag `v1.0` has `trigger` as an executable file (mode 100755, content `#!/bin/sh\\nmalicious_payload`)\n2. Victim clones the repository \u2014 worktree has `trigger` \u2192 `../../.git/hooks/post-checkout` (a symlink)\n3. Victim runs `porcelain.checkout(repo, target=\"v1.0\", paths=[\"trigger\"])` to restore a specific file from a tag\n4. `_checked_worktree_path(r, \"trigger\")` passes \u2014 name validation only, no symlink check\n5. `os.open(\"trigger\", O_WRONLY|O_CREAT|O_TRUNC, 0o755)` follows the symlink \u2192 opens `.git/hooks/post-checkout` for writing\n6. `f.write(obj.data)` writes the malicious payload to the hook\n7. Next checkout operation triggers the hook \u2192 RCE\n\n## Suggested Fix\n\nReplace the raw `os.open` path with a call to `build_file_from_blob` (once that function is hardened against intermediate symlinks), or add explicit symlink detection: resolve the path with `os.path.realpath()` and verify it stays within the worktree root before opening.\n\nReported by **zx (Jace)**",
  "id": "GHSA-8w8g-wq8h-fq33",
  "modified": "2026-10-02T18:53:35Z",
  "published": "2026-10-02T18:53:35Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/jelmer/dulwich/security/advisories/GHSA-8w8g-wq8h-fq33"
    },
    {
      "type": "WEB",
      "url": "https://github.com/jelmer/dulwich/commit/9389fcb5cb9113adfc7f207d8be86a56904db3e8"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/jelmer/dulwich"
    },
    {
      "type": "WEB",
      "url": "https://github.com/jelmer/dulwich/releases/tag/dulwich-1.2.8"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Dulwich: Symlink write-through in checkout(paths=[]) via raw os.open bypasses all symlink protections"
}

GHSA-8W9V-CH8X-63JR

Vulnerability from github – Published: 2024-11-07 21:31 – Updated: 2025-08-27 18:31
VLAI
Details

A path collision and arbitrary code execution vulnerability was identified in GitHub Enterprise Server that allowed container escape and privilege escalation to root via the ghe-firejail path. This vulnerability affected all versions of GitHub Enterprise prior to 3.15 and was fixed in versions 3.14.3, 3.13.6, 3.12.11, and 3.11.17. This vulnerability was reported via the GitHub Bug Bounty program.

Severity
9.1 (Critical)
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
8.7 (High)
CVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Show details on source website
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{
  "affected": [],
  "aliases": [
    "CVE-2024-10007"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-59"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-11-07T21:15:06Z",
    "severity": "HIGH"
  },
  "details": "A path collision and arbitrary code execution vulnerability was identified in GitHub Enterprise Server that allowed container escape and privilege escalation to root via the ghe-firejail path. This vulnerability affected all versions of GitHub Enterprise prior to 3.15 and was fixed in versions 3.14.3, 3.13.6, 3.12.11, and 3.11.17. This vulnerability was reported via the GitHub Bug Bounty program.",
  "id": "GHSA-8w9v-ch8x-63jr",
  "modified": "2025-08-27T18:31:50Z",
  "published": "2024-11-07T21:31:44Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-10007"
    },
    {
      "type": "WEB",
      "url": "https://docs.github.com/en/enterprise-server@3.11/admin/release-notes#3.11.17"
    },
    {
      "type": "WEB",
      "url": "https://docs.github.com/en/enterprise-server@3.12/admin/release-notes#3.12.11"
    },
    {
      "type": "WEB",
      "url": "https://docs.github.com/en/enterprise-server@3.13/admin/release-notes#3.13.6"
    },
    {
      "type": "WEB",
      "url": "https://docs.github.com/en/enterprise-server@3.14/admin/release-notes#3.14.3"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}
Mitigation MIT-48.1
Architecture and Design

Strategy: Separation of Privilege

  • Follow the principle of least privilege when assigning access rights to entities in a software system.
  • Denying access to a file can prevent an attacker from replacing that file with a link to a sensitive file. Ensure good compartmentalization in the system to provide protected areas that can be trusted.
CAPEC-132: Symlink Attack

An adversary positions a symbolic link in such a manner that the targeted user or application accesses the link's endpoint, assuming that it is accessing a file with the link's name.

CAPEC-17: Using Malicious Files

An attack of this type exploits a system's configuration that allows an adversary to either directly access an executable file, for example through shell access; or in a possible worst case allows an adversary to upload a file and then execute it. Web servers, ftp servers, and message oriented middleware systems which have many integration points are particularly vulnerable, because both the programmers and the administrators must be in synch regarding the interfaces and the correct privileges for each interface.

CAPEC-35: Leverage Executable Code in Non-Executable Files

An attack of this type exploits a system's trust in configuration and resource files. When the executable loads the resource (such as an image file or configuration file) the attacker has modified the file to either execute malicious code directly or manipulate the target process (e.g. application server) to execute based on the malicious configuration parameters. Since systems are increasingly interrelated mashing up resources from local and remote sources the possibility of this attack occurring is high.

CAPEC-76: Manipulating Web Input to File System Calls

An attacker manipulates inputs to the target software which the target software passes to file system calls in the OS. The goal is to gain access to, and perhaps modify, areas of the file system that the target software did not intend to be accessible.

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