F5-K000140975: Race Condition

First published: Fri Sep 06 2024(Updated: )

A race condition vulnerability was discovered in how signals are handled by OpenSSH's server (sshd). If a remote attacker does not authenticate within a set time period, then sshd's SIGALRM handler is called asynchronously. However, this signal handler calls various functions that are not async-signal-safe, for example, syslog(). As a consequence of a successful attack, in the worst case scenario, an attacker may be able to perform a remote code execution (RCE) as an unprivileged user running the sshd server.

Never miss a vulnerability like this again

Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.

Read MoreStart Free Trial

• agent/severity
• agent/references
• agent/weakness
• agent/last-modified-date
• agent/type
• agent/description
• agent/event
• agent/softwarecombine
• agent/first-publish-date
• agent/source
• agent/tags
• collector/f5-advisory
• source/F5
• alias/CVE-2024-6409
• agent/software-canonical-lookup
• agent/software-canonical-lookup-request
• vendor/f5
• canonical/f5 big-ip service proxy for kubernetes
• version/f5 big-ip service proxy for kubernetes/1.7.0
• version/f5 big-ip service proxy for kubernetes/1.9.2
• canonical/f5 big-ip next cloud-native network functions
• version/f5 big-ip next cloud-native network functions/1.1.0
• version/f5 big-ip next cloud-native network functions/1.3.1