Race Condition Affecting openssh-debuginfo package, versions <0:8.7p1-38.el9_4.4


Severity

Recommended
medium

Based on Rocky Linux security rating.

Threat Intelligence

EPSS
27.94% (98th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-ROCKY9-OPENSSHDEBUGINFO-7453187
  • published16 Jul 2024
  • disclosed8 Jul 2024

Introduced: 8 Jul 2024

CVE-2024-6409  (opens in a new tab)
CWE-364  (opens in a new tab)

How to fix?

Upgrade Rocky-Linux:9 openssh-debuginfo to version 0:8.7p1-38.el9_4.4 or higher.
This issue was patched in RLSA-2024:4457.

NVD Description

Note: Versions mentioned in the description apply only to the upstream openssh-debuginfo package and not the openssh-debuginfo package as distributed by Rocky-Linux. See How to fix? for Rocky-Linux:9 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1