https://cve.radiocsirt.org Contains only the most 10 recent entries. http://www.rssboard.org/rss-specification python-feedgen en Fri, 02 Oct 2026 13:59:37 +0000 https://cve.radiocsirt.org/vuln/cve-2026-44305 <p><strong>Affected:</strong> Netflix lemur</p> <p>Lemur manages TLS certificate creation. Prior to 1.9.0, when LDAP TLS is enabled (LDAP_USE_TLS = True), Lemur&#39;s LDAP authentication module unconditionally disables TLS certificate verification at the global ldap module level. This allows a man-in-the-middle attacker positioned between Lemur and the LDAP server to intercept all authentication credentials. This vulnerability is fixed in 1.9.0.</p> <p><strong>Affected:</strong> Netflix lemur</p> <p>Lemur manages TLS certificate creation. Prior to 1.9.0, when LDAP TLS is enabled (LDAP_USE_TLS = True), Lemur&#39;s LDAP authentication module unconditionally disables TLS certificate verification at the global ldap module level. This allows a man-in-the-middle attacker positioned between Lemur and the LDAP server to intercept all authentication credentials. This vulnerability is fixed in 1.9.0.</p> https://cve.radiocsirt.org/vuln/cve-2026-44305 https://cve.radiocsirt.org/vuln/ghsa-vr7c-r5gj-j3w5 <p><strong>Affected:</strong> PyPI: lemur</p> <p>## Description</p> <p>### Overview</p> <p>When LDAP TLS is enabled (`LDAP_USE_TLS = True`), Lemur&#39;s LDAP authentication module unconditionally disables TLS certificate verification at the **global** `ldap` module level. This allows a man-in-the-middle attacker positioned between Lemur and the LDAP server to intercept all authentication credentials.</p> <p>### Vulnerable Code</p> <p>**Location:** `lemur/auth/ldap.py`, `_bind()` method, line ~172</p> <p>```python if self.ldap_use_tls: ldap.set_option(ldap.OPT_X_TLS_REQUIRE_CERT, ldap.OPT_X_TLS_NEVER) ```</p> <p>Key issues:</p> <p>1. `ldap.set_option()` is a **global** call (as opposed to `self.ldap_client.set_option()`), meaning it disables TLS verification for the entire Python process, not just this connection 2. `OPT_X_TLS_NEVER` means no certificate validation is performed whatsoever — self-signed, expired, wrong hostname, and revoked certificates are all silently accepted 3. There is no configuration option to override this behavior — TLS verification is always disabled when TLS is enabled</p> <p>### Impact</p> <p>A network-positioned attacker (man-in-the-middle) between Lemur and the LDAP server can:</p> <p>- **Intercept all LDAP credentials** (usernames and plaintext passwords) for every user who authenticates - **Modify LDAP responses** to inject arbitrary group memberships, granting admin access - **Compromise the entire PKI infrastructure** managed by Lemur, since authentication controls access to certificates and private keys</p> <p>This is particularly severe because Lemur is…</p> <p><strong>Affected:</strong> PyPI: lemur</p> <p>## Description</p> <p>### Overview</p> <p>When LDAP TLS is enabled (`LDAP_USE_TLS = True`), Lemur&#39;s LDAP authentication module unconditionally disables TLS certificate verification at the **global** `ldap` module level. This allows a man-in-the-middle attacker positioned between Lemur and the LDAP server to intercept all authentication credentials.</p> <p>### Vulnerable Code</p> <p>**Location:** `lemur/auth/ldap.py`, `_bind()` method, line ~172</p> <p>```python if self.ldap_use_tls: ldap.set_option(ldap.OPT_X_TLS_REQUIRE_CERT, ldap.OPT_X_TLS_NEVER) ```</p> <p>Key issues:</p> <p>1. `ldap.set_option()` is a **global** call (as opposed to `self.ldap_client.set_option()`), meaning it disables TLS verification for the entire Python process, not just this connection 2. `OPT_X_TLS_NEVER` means no certificate validation is performed whatsoever — self-signed, expired, wrong hostname, and revoked certificates are all silently accepted 3. There is no configuration option to override this behavior — TLS verification is always disabled when TLS is enabled</p> <p>### Impact</p> <p>A network-positioned attacker (man-in-the-middle) between Lemur and the LDAP server can:</p> <p>- **Intercept all LDAP credentials** (usernames and plaintext passwords) for every user who authenticates - **Modify LDAP responses** to inject arbitrary group memberships, granting admin access - **Compromise the entire PKI infrastructure** managed by Lemur, since authentication controls access to certificates and private keys</p> <p>This is particularly severe because Lemur is…</p> https://cve.radiocsirt.org/vuln/ghsa-vr7c-r5gj-j3w5