Name | CVE-2024-6409 |
Description | 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. |
Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
The table below lists information on source packages.
Source Package | Release | Version | Status |
---|---|---|---|
openssh (PTS) | jessie, jessie (lts) | 1:6.7p1-5+deb8u10 | fixed |
stretch (security) | 1:7.4p1-10+deb9u6 | fixed | |
stretch (lts), stretch | 1:7.4p1-10+deb9u9 | fixed | |
buster (security), buster, buster (lts) | 1:7.9p1-10+deb10u4 | fixed | |
bullseye (security), bullseye | 1:8.4p1-5+deb11u3 | fixed | |
bookworm (security), bookworm | 1:9.2p1-2+deb12u3 | fixed | |
trixie, sid | 1:9.8p1-8 | fixed |
The information below is based on the following data on fixed versions.
Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
---|---|---|---|---|---|---|
openssh | source | (unstable) | (not affected) |
- openssh <not-affected> (Exploitable issue in RHEL9 packaged versions)
https://www.openwall.com/lists/oss-security/2024/07/08/2