Return of Wrong Status Code Affecting libssh package, versions *


Severity

Recommended
low

Based on Debian security rating.

Threat Intelligence

EPSS
0.04% (11th percentile)

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  • Snyk IDSNYK-DEBIAN12-LIBSSH-10498785
  • published25 Jun 2025
  • disclosed7 Jul 2025

Introduced: 25 Jun 2025

NewCVE-2025-5987  (opens in a new tab)
CWE-393  (opens in a new tab)

How to fix?

There is no fixed version for Debian:12 libssh.

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:12 relevant fixed versions and status.

A flaw was found in libssh when using the ChaCha20 cipher with the OpenSSL library. If an attacker manages to exhaust the heap space, this error is not detected and may lead to libssh using a partially initialized cipher context. This occurs because the OpenSSL error code returned aliases with the SSH_OK code, resulting in libssh not properly detecting the error returned by the OpenSSL library. This issue can lead to undefined behavior, including compromised data confidentiality and integrity or crashes.

CVSS Base Scores

version 3.1