4.5

CVE-2025-4877

Libssh: write beyond bounds in binary to base64 conversion functions

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.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
Collection URLhttps://www.libssh.org
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Paket libssh
Default Statusunaffected
Version 0
Version < 0.11.2
Status affected
HerstellerRed Hat
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Produkt Red Hat Enterprise Linux 9
Default Statusaffected
Version 0:0.10.4-18.el9
Version < *
Status unaffected
HerstellerRed Hat
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Produkt Red Hat Enterprise Linux 9
Default Statusaffected
Version 0:0.10.4-18.el9
Version < *
Status unaffected
HerstellerRed Hat
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Produkt Red Hat Enterprise Linux 10
Default Statusunaffected
HerstellerRed Hat
≫
Produkt Red Hat Enterprise Linux 6
Default Statusunaffected
HerstellerRed Hat
≫
Produkt Red Hat Enterprise Linux 7
Default Statusunaffected
HerstellerRed Hat
≫
Produkt Red Hat Enterprise Linux 8
Default Statusunaffected
HerstellerRed Hat
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Produkt Red Hat OpenShift Container Platform 4
Default Statusunaffected
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.18% 0.075
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
secalert@redhat.com 4.5 1 3.4
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L
CWE-787 Out-of-bounds Write

The product writes data past the end, or before the beginning, of the intended buffer.

https://access.redhat.com/security/cve/CVE-2025-4877
https://bugzilla.redhat.com/show_bug.cgi?id=2376193
https://git.libssh.org/projects/libssh.git/commit/?h=stable-0.11&id=6fd9cc8ce3958092a1aae11f1f2e911b2747732d
https://www.libssh.org/security/advisories/CVE-2025-4877.txt
https://access.redhat.com/errata/RHSA-2026:18683