CVE-2025-4877

Libssh: write beyond bounds in binary to base64 conversion functions

En bref

Sévérité
MEDIUM 4.5
EPSS
EPSS 0.20 % · centile 10 (2026-10-27)
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
redhat
Statut NVD
Deferred

Description

There's a vulnerability in the libssh package where when a libssh consumer passes in an unexpectedly large input buffer to ssh_get_fingerprint_hash() function. In such cases the bin_to_base64() function can experience an integer overflow leading to a memory under allocation, when that happens it's possible that the program perform out of bounds write leading to a heap corruption. This issue affects only 32-bits builds of libssh.

Scores

VersionScoreVecteurÉvalué par
CVSS 3.1MEDIUM 4.5CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:Lredhat
CVSS 3.1MEDIUM 4.5CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:LNVD · secalert@redhat.com (Secondary)

Faiblesses (CWE)

Références européennes

Avis du CERT-FR

Produits affectés

ProduitVersions
libsshaffected 0 < 0.11.2
Red Hat · Red Hat Enterprise Linux 9unaffected 0:0.10.4-18.el9 < *
Red Hat · Red Hat Enterprise Linux 9unaffected 0:0.10.4-18.el9 < *
Red Hat · Red Hat Enterprise Linux 10
Red Hat · Red Hat Enterprise Linux 6
Red Hat · Red Hat Enterprise Linux 7
Red Hat · Red Hat Enterprise Linux 8
Red Hat · Red Hat OpenShift Container Platform 4
Red Hat · Red Hat OpenShift Container Platform 4

Références

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD