Erez Cohen

**Name of the Vulnerable Software and Affected Versions** Jenkins LDAP Plugin versions prior to 809.vd3a 4e5e4ec98 **Description** The software follows LDAP referrals from the configured LDAP server. An attacker who controls the LDAP server or performs a machine-in-the-middle attack can forward these referrals to an RMI URL. This causes the Jenkins controller to deserialize attacker-controlled data, which can lead to Remote Code Execution (RCE) if deserialization gadgets are present on the classpath. Deserialization gadgets are specific classes available in the application's environment that can be abused during the process of converting data back into an object to execute unintended code. **Recommendations** Update Jenkins LDAP Plugin to version 809.vd3a 4e5e4ec98 or later.

**Name of the Vulnerable Software and Affected Versions** Jenkins LDAP Plugin versions prior to 807.v7d7de30930cf **Description** The plugin deserializes data from LDAP referrals without proper validation. Deserialization is the process of converting a data stream back into an object, which, when performed on untrusted data without validation, can lead to security compromises. **Recommendations** Update to a version later than 807.v7d7de30930cf.

**Name of the Vulnerable Software and Affected Versions** ctdb versions prior to 4.23.8+git.477.f78166bceed-1.1 **Description** A denial of service issue exists against the AD DC WINS server. **Recommendations** Update to version 4.23.8+git.477.f78166bceed-1.1.

**GNU inetutils telnetd versions prior to 2.8** **Description** A buffer overflow exists in the LINEMODE SLC (Set Local Characters) suboption handler of the telnetd daemon. The issue occurs because the `add slc()` function does not verify if the buffer is full before copying data, leading to an out-of-bounds write. An unauthenticated remote attacker can exploit this by sending a specially crafted packet during the initial connection handshake via port 23, potentially achieving remote code execution with root privileges. Approximately 50,000 internet-exposed assets have been identified as potentially affected. **Recommendations** Disable the telnetd service immediately and replace it with SSH. Block all external access to TCP port 23 at the network perimeter and host-based firewalls.