Double Free Affecting openssh package, versions <1:9.2p1-1


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.94% (84th percentile)

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  • Snyk IDSNYK-DEBIAN12-OPENSSH-3310458
  • published4 Feb 2023
  • disclosed3 Feb 2023

Introduced: 3 Feb 2023

CVE-2023-25136  (opens in a new tab)
CWE-415  (opens in a new tab)

How to fix?

Upgrade Debian:12 openssh to version 1:9.2p1-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream openssh package and not the openssh package as distributed by Debian. See How to fix? for Debian:12 relevant fixed versions and status.

OpenSSH server (sshd) 9.1 introduced a double-free vulnerability during options.kex_algorithms handling. This is fixed in OpenSSH 9.2. The double free can be leveraged, by an unauthenticated remote attacker in the default configuration, to jump to any location in the sshd address space. One third-party report states "remote code execution is theoretically possible."

CVSS Scores

version 3.1