CVE-2025-4877

Published Aug 20, 2025

Last updated 23 days ago

CVSS medium 4.5
Mysql

Overview

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.
Source
secalert@redhat.com
NVD status
Deferred

Risk scores

CVSS 3.1

Type
Secondary
Base score
4.5
Impact score
3.4
Exploitability score
1
Vector string
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L
Severity
MEDIUM

Weaknesses

secalert@redhat.com
CWE-787

Social media

Hype score
Not currently trending

  1. CVE-2025-4877 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 … https://t.co/z2rH8mr5ps

    @CVEnew

    20 Aug 2025

    208 Impressions

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References

Sources include official advisories and independent security research.