VULNERABILITY INTELLIGENCE
CVE-2025-4877
CVSS score4.5 MEDIUM
EPSS probability0.20%
CISA KEVNot currently listed
Published2025-08-20
Last modified2026-08-31
CVSS vectorCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L
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.
Weakness classification
- CWE-787: Out-of-bounds Write