Libssh: libssh: denial of service via inefficient regular expression processing
8Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 2.2epss 0.2%
exploitation probability
0.2%top 87% of all CVEs
observed exploitation
nono source reports it
A flaw was found in libssh. A remote attacker, by controlling client configuration files or known_hosts files, could craft specific hostnames that when processed by the `match_pattern()` function can lead to inefficient regular expression backtracking. This can cause timeouts and resource exhaustion, resulting in a Denial of Service (DoS) for the client.
CVSS:3.0/AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:L