Vulnerability-Lookup

CNVD-2022-08147

Vulnerability from cnvd - Published: 2022-02-01

Title

Zulip server安全特征问题漏洞

Description

Zulip server是美国Zulip公司的一款开源的团队聊天应用程序。 Zulip Server 4.9之前版本存在安全特征问题漏洞，该漏洞源于错误的输入验证造成的。远程攻击者可以利用该漏洞发送精心编制的请求，并在目标系统上执行任意代码。

Severity

高

Patch Name

Zulip server安全特征问题漏洞的补丁

Patch Description

Zulip server是美国Zulip公司的一款开源的团队聊天应用程序。 Zulip Server 4.9之前版本存在安全特征问题漏洞，该漏洞源于错误的输入验证造成的。远程攻击者可以利用该漏洞发送精心编制的请求，并在目标系统上执行任意代码。目前，供应商发布了安全公告及相关补丁信息，修复了此漏洞。

Formal description

厂商已发布了漏洞修复程序，请及时关注更新： https://github.com/zulip/zulip/security/advisories/GHSA-p663-wxvv-2fjp

Reference

https://www.cybersecurity-help.cz/vdb/SB2022012511

Impacted products

Name
Zulip Zulip Server <4.9

Show details on source website

JSON

To clipboard

{
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    "cve": {
      "cveNumber": "CVE-2021-43799",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2021-43799"
    }
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  "number": "CNVD-2022-08147",
  "openTime": "2022-02-01",
  "patchDescription": "Zulip server\u662f\u7f8e\u56fdZulip\u516c\u53f8\u7684\u4e00\u6b3e\u5f00\u6e90\u7684\u56e2\u961f\u804a\u5929\u5e94\u7528\u7a0b\u5e8f\u3002\r\n\r\nZulip Server 4.9\u4e4b\u524d\u7248\u672c\u5b58\u5728\u5b89\u5168\u7279\u5f81\u95ee\u9898\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u9519\u8bef\u7684\u8f93\u5165\u9a8c\u8bc1\u9020\u6210\u7684\u3002\u8fdc\u7a0b\u653b\u51fb\u8005\u53ef\u4ee5\u5229\u7528\u8be5\u6f0f\u6d1e\u53d1\u9001\u7cbe\u5fc3\u7f16\u5236\u7684\u8bf7\u6c42\uff0c\u5e76\u5728\u76ee\u6807\u7cfb\u7edf\u4e0a\u6267\u884c\u4efb\u610f\u4ee3\u7801\u3002\u76ee\u524d\uff0c\u4f9b\u5e94\u5546\u53d1\u5e03\u4e86\u5b89\u5168\u516c\u544a\u53ca\u76f8\u5173\u8865\u4e01\u4fe1\u606f\uff0c\u4fee\u590d\u4e86\u6b64\u6f0f\u6d1e\u3002",
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  "products": {
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  "referenceLink": "https://www.cybersecurity-help.cz/vdb/SB2022012511",
  "serverity": "\u9ad8",
  "submitTime": "2022-01-27",
  "title": "Zulip server\u5b89\u5168\u7279\u5f81\u95ee\u9898\u6f0f\u6d1e"
}

CVE-2021-43799 (GCVE-0-2021-43799)

Vulnerability from cvelistv5 – Published: 2022-01-25 20:55 – Updated: 2025-04-23 19:09

Title

RabbitMQ exposes ports with weak default secrets in Zulip Server

Summary

Zulip is an open-source team collaboration tool. Zulip Server installs RabbitMQ for internal message passing. In versions of Zulip Server prior to 4.9, the initial installation (until first reboot, or restart of RabbitMQ) does not successfully limit the default ports which RabbitMQ opens; this includes port 25672, the RabbitMQ distribution port, which is used as a management port. RabbitMQ's default "cookie" which protects this port is generated using a weak PRNG, which limits the entropy of the password to at most 36 bits; in practicality, the seed for the randomizer is biased, resulting in approximately 20 bits of entropy. If other firewalls (at the OS or network level) do not protect port 25672, a remote attacker can brute-force the 20 bits of entropy in the "cookie" and leverage it for arbitrary execution of code as the rabbitmq user. They can also read all data which is sent through RabbitMQ, which includes all message traffic sent by users. Version 4.9 contains a patch for this vulnerability. As a workaround, ensure that firewalls prevent access to ports 5672 and 25672 from outside the Zulip server.

Severity

8.6 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-04-23 15:57 UTC

CWE

CWE-338 - Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)

Assigner

GitHub_M mitre root Scorecard

References

4 references

URL	Tags
https://github.com/zulip/zulip/security/advisorie…	x_refsource_CONFIRM
https://github.com/zulip/zulip/commit/a5496f4098e…	x_refsource_MISC
https://github.com/gteissier/erl-matter	x_refsource_MISC
https://github.com/zulip/zulip/releases/tag/4.9	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
zulip	zulip	Affected: < 4.9

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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CNVD-2022-08147

CVE-2021-43799 (GCVE-0-2021-43799)

Tags

Sightings

Nomenclature

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