CVE-2023-6858

Published: Dec 19, 2023Modified: May 7, 2025

8.8

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Exploitability: 2.8 / Impact: 5.9

Source: NVD

Description

Firefox was susceptible to a heap buffer overflow in `nsTextFragment` due to insufficient OOM handling. This vulnerability affects Firefox ESR < 115.6, Thunderbird < 115.6, and Firefox < 121.

Affected (6)

Products: Mozilla: Firefox, Firefox Esr, Thunderbird · Debian: Debian Linux

3 products

1 product

Configuration A

3 vulnerable

Vulnerable Software	Affected Versions
Mozilla Firefox	Before 121.0
Mozilla Firefox Esr	Before 115.6
Mozilla Thunderbird	Before 115.6

Configuration B

3 vulnerable

Vulnerable Software	Affected Versions
Debian Debian Linux	Version 10.0
Debian Debian Linux	Version 11.0
Debian Debian Linux	Version 12.0

Related CWEs

CWE-787

Out-of-bounds Write

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

References (18)

https://bugzilla.mozilla.org/show_bug.cgi?id=1826791

Source: security@mozilla.org

Issue TrackingPermissions Required

https://lists.debian.org/debian-lts-announce/2023/12/msg00020.html

Source: security@mozilla.org

Mailing ListThird Party Advisory

https://lists.debian.org/debian-lts-announce/2023/12/msg00021.html

Source: security@mozilla.org

Mailing ListThird Party Advisory

https://security.gentoo.org/glsa/202401-10

Source: security@mozilla.org

Third Party Advisory

https://www.debian.org/security/2023/dsa-5581

Source: security@mozilla.org

Third Party Advisory

https://www.debian.org/security/2023/dsa-5582

Source: security@mozilla.org

Third Party Advisory

https://www.mozilla.org/security/advisories/mfsa2023-54/

Source: security@mozilla.org

Vendor Advisory

https://www.mozilla.org/security/advisories/mfsa2023-55/

Source: security@mozilla.org

Vendor Advisory

https://www.mozilla.org/security/advisories/mfsa2023-56/

Source: security@mozilla.org

Vendor Advisory

https://bugzilla.mozilla.org/show_bug.cgi?id=1826791