CVE-2024-6409
moderate-risk
Published 2024-07-08
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.
Do I need to act?
!
76.4% chance of exploitation in next 30 days
EPSS score — higher than 24% of all CVEs
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.0/10
High
NETWORK
/ HIGH complexity
References (28)
and 8 more references
46
/ 100
moderate-risk
Severity
21/34 · High
Exploitability
20/34 · Moderate
Exposure
5/34 · Minimal