Integer Overflow or Wraparound Affecting libssh package, versions <0.11.2-1


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.06% (18th percentile)

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  • Snyk IDSNYK-DEBIAN13-LIBSSH-10498782
  • published25 Jun 2025
  • disclosed25 Jul 2025

Introduced: 25 Jun 2025

CVE-2025-5449  (opens in a new tab)
CWE-190  (opens in a new tab)

How to fix?

Upgrade Debian:13 libssh to version 0.11.2-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libssh package and not the libssh package as distributed by Debian. See How to fix? for Debian:13 relevant fixed versions and status.

A flaw was found in the SFTP server message decoding logic of libssh. The issue occurs due to an incorrect packet length check that allows an integer overflow when handling large payload sizes on 32-bit systems. This issue leads to failed memory allocation and causes the server process to crash, resulting in a denial of service.

CVSS Base Scores

version 3.1