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.
| Affected Software | Affected Version | How to fix |
|---|---|---|
| F5 BIG-IP Next SPK | >=1.7.0<=1.9.2 | |
| F5 BIG-IP Next CNF | >=1.1.0<=1.3.1 |
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Reference Links
- collector/f5-advisory
- source/F5
- alias/CVE-2024-6409
- agent/software-canonical-lookup
- agent/severity
- agent/references
- agent/weakness
- agent/last-modified-date
- agent/tags
- agent/type
- agent/description
- agent/event
- agent/softwarecombine
- agent/first-publish-date
- vendor/f5
- canonical/f5 big-ip next spk
- version/f5 big-ip next spk/1.7.0
- version/f5 big-ip next spk/1.9.2
- canonical/f5 big-ip next cnf
- version/f5 big-ip next cnf/1.1.0
- version/f5 big-ip next cnf/1.3.1