CVE catalog

CVE-2024-7589

openssh: CVE-2024-7589

Severity: High · CVSS 8.1CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: Aug 7, 2024, 10:00:00 PM UTC
Source: [NVD] · [CVE record]
EPSS: 2.04% · Oct 25, 2026

A signal handler in sshd(8) may call a logging function that is not async-signal-safe. The signal handler is invoked when a client does not authenticate within the LoginGraceTime seconds (120 by default). This signal handler executes in the context of the sshd(8)'s privileged code, which is not sandboxed and runs with full root privileges. This issue is another instance of the problem in CVE-2024-6387 addressed by FreeBSD-SA-24:04.openssh. The faulty code in this case is from the integration of blacklistd in OpenSSH in FreeBSD. As a result of calling functions that are not async-signal-safe in the privileged sshd(8) context, a race condition exists that a determined attacker may be able to exploit to allow an unauthenticated remote code execution as root.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	openssh	sid	`1:10.6p1-1`	not affected
Debian	openssh	forky	`1:10.6p1-1`	not affected
Debian	openssh	trixie	`1:10.0p1-7+deb13u4`	not affected
Debian	openssh	trixie-security	`1:10.0p1-7+deb13u2`	not affected
Debian	openssh	bookworm	`1:9.2p1-2+deb12u10`	not affected
Debian	openssh	bookworm-security	`1:9.2p1-2+deb12u9`	not affected

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	openssh	source	sid	`Not affected`	unimportant	Not reported	Not reported
Debian	openssh	source	forky	`Not affected`	unimportant	Not reported	Not reported
Debian	openssh	source	trixie	`Not affected`	unimportant	Not reported	Not reported
Debian	openssh	source	bookworm	`Not affected`	unimportant	Not reported	Not reported

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

[openssh-client]Unknown
Source package: [openssh]
Details (8)
- 1:9.2p1-2+deb12u10 · amd64 · bookworm
  Not affected
  dsa · openssh · debian · bookworm
- 1:9.2p1-2+deb12u10 · arm64 · bookworm
  Not affected
  dsa · openssh · debian · bookworm
- 1:10.0p1-7~bpo12+1 · amd64 · bookworm-backports
  Not affected
  dsa · openssh · debian · bookworm
- 1:10.0p1-7~bpo12+1 · arm64 · bookworm-backports
  Not affected
  dsa · openssh · debian · bookworm
- 1:9.2p1-2+deb12u9 · amd64 · bookworm-security
  Not affected
  dsa · openssh · debian · bookworm
- 1:9.2p1-2+deb12u9 · arm64 · bookworm-security
  Not affected
  dsa · openssh · debian · bookworm
- 1:9.2p1-2+deb12u7 · amd64 · bookworm-updates
  Not affected
  dsa · openssh · debian · bookworm
- 1:9.2p1-2+deb12u7 · arm64 · bookworm-updates
  Not affected
  dsa · openssh · debian · bookworm
[openssh-client-gssapi]Unknown
Source package: [openssh]
Details (2)
- 1:10.0p1-7~bpo12+1 · all · bookworm-backports
  Not affected
  dsa · openssh · debian · bookworm
- 1:10.0p1-7~bpo12+1 · all · bookworm-backports
  Not affected
  dsa · openssh · debian · bookworm
[openssh-server]Unknown
Source package: [openssh]
Details (8)
- 1:9.2p1-2+deb12u10 · amd64 · bookworm
  Not affected
  dsa · openssh · debian · bookworm
- 1:9.2p1-2+deb12u10 · arm64 · bookworm
  Not affected
  dsa · openssh · debian · bookworm
- 1:10.0p1-7~bpo12+1 · amd64 · bookworm-backports
  Not affected
  dsa · openssh · debian · bookworm
- 1:10.0p1-7~bpo12+1 · arm64 · bookworm-backports
  Not affected
  dsa · openssh · debian · bookworm
- 1:9.2p1-2+deb12u9 · amd64 · bookworm-security
  Not affected
  dsa · openssh · debian · bookworm
- 1:9.2p1-2+deb12u9 · arm64 · bookworm-security
  Not affected
  dsa · openssh · debian · bookworm
- 1:9.2p1-2+deb12u7 · amd64 · bookworm-updates
  Not affected
  dsa · openssh · debian · bookworm
- 1:9.2p1-2+deb12u7 · arm64 · bookworm-updates
  Not affected
  dsa · openssh · debian · bookworm
[openssh-server-gssapi]Unknown
Source package: [openssh]
Details (2)
- 1:10.0p1-7~bpo12+1 · all · bookworm-backports
  Not affected
  dsa · openssh · debian · bookworm
- 1:10.0p1-7~bpo12+1 · all · bookworm-backports
  Not affected
  dsa · openssh · debian · bookworm
[openssh-sftp-server]Unknown
Source package: [openssh]
Details (8)
- 1:9.2p1-2+deb12u10 · amd64 · bookworm
  Not affected
  dsa · openssh · debian · bookworm
- 1:9.2p1-2+deb12u10 · arm64 · bookworm
  Not affected
  dsa · openssh · debian · bookworm
- 1:10.0p1-7~bpo12+1 · amd64 · bookworm-backports
  Not affected
  dsa · openssh · debian · bookworm
- 1:10.0p1-7~bpo12+1 · arm64 · bookworm-backports
  Not affected
  dsa · openssh · debian · bookworm
- 1:9.2p1-2+deb12u9 · amd64 · bookworm-security
  Not affected
  dsa · openssh · debian · bookworm
- 1:9.2p1-2+deb12u9 · arm64 · bookworm-security
  Not affected
  dsa · openssh · debian · bookworm
- 1:9.2p1-2+deb12u7 · amd64 · bookworm-updates
  Not affected
  dsa · openssh · debian · bookworm
- 1:9.2p1-2+deb12u7 · arm64 · bookworm-updates
  Not affected
  dsa · openssh · debian · bookworm
[openssh-tests]Unknown
Source package: [openssh]
Details (8)
- 1:9.2p1-2+deb12u10 · amd64 · bookworm
  Not affected
  dsa · openssh · debian · bookworm
- 1:9.2p1-2+deb12u10 · arm64 · bookworm
  Not affected
  dsa · openssh · debian · bookworm
- 1:10.0p1-7~bpo12+1 · amd64 · bookworm-backports
  Not affected
  dsa · openssh · debian · bookworm
- 1:10.0p1-7~bpo12+1 · arm64 · bookworm-backports
  Not affected
  dsa · openssh · debian · bookworm
- 1:9.2p1-2+deb12u9 · amd64 · bookworm-security
  Not affected
  dsa · openssh · debian · bookworm
- 1:9.2p1-2+deb12u9 · arm64 · bookworm-security
  Not affected
  dsa · openssh · debian · bookworm
- 1:9.2p1-2+deb12u7 · amd64 · bookworm-updates
  Not affected
  dsa · openssh · debian · bookworm
- 1:9.2p1-2+deb12u7 · arm64 · bookworm-updates
  Not affected
  dsa · openssh · debian · bookworm
[ssh]Unknown
Source package: [openssh]
Details (8)
- 1:9.2p1-2+deb12u10 · all · bookworm
  Not affected
  dsa · openssh · debian · bookworm
- 1:9.2p1-2+deb12u10 · all · bookworm
  Not affected
  dsa · openssh · debian · bookworm
- 1:10.0p1-7~bpo12+1 · all · bookworm-backports
  Not affected
  dsa · openssh · debian · bookworm
- 1:10.0p1-7~bpo12+1 · all · bookworm-backports
  Not affected
  dsa · openssh · debian · bookworm
- 1:9.2p1-2+deb12u9 · all · bookworm-security
  Not affected
  dsa · openssh · debian · bookworm
- 1:9.2p1-2+deb12u9 · all · bookworm-security
  Not affected
  dsa · openssh · debian · bookworm
- 1:9.2p1-2+deb12u7 · all · bookworm-updates
  Not affected
  dsa · openssh · debian · bookworm
- 1:9.2p1-2+deb12u7 · all · bookworm-updates
  Not affected
  dsa · openssh · debian · bookworm
[ssh-askpass-gnome]Unknown
Source package: [openssh]
Details (8)
- 1:9.2p1-2+deb12u10 · amd64 · bookworm
  Not affected
  dsa · openssh · debian · bookworm
- 1:9.2p1-2+deb12u10 · arm64 · bookworm
  Not affected
  dsa · openssh · debian · bookworm
- 1:10.0p1-7~bpo12+1 · amd64 · bookworm-backports
  Not affected
  dsa · openssh · debian · bookworm
- 1:10.0p1-7~bpo12+1 · arm64 · bookworm-backports
  Not affected
  dsa · openssh · debian · bookworm
- 1:9.2p1-2+deb12u9 · amd64 · bookworm-security
  Not affected
  dsa · openssh · debian · bookworm
- 1:9.2p1-2+deb12u9 · arm64 · bookworm-security
  Not affected
  dsa · openssh · debian · bookworm
- 1:9.2p1-2+deb12u7 · amd64 · bookworm-updates
  Not affected
  dsa · openssh · debian · bookworm
- 1:9.2p1-2+deb12u7 · arm64 · bookworm-updates
  Not affected
  dsa · openssh · debian · bookworm

Observed: Oct 27, 2026, 2:32:45 AM UTC

References

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]