CVE-2023-6858 — Out-of-bounds Write in Mozilla Firefox

CWE-787 — Out-of-bounds WriteCWE-122 — Heap-based Buffer Overflow14 documents8 sources
Severity
8.8HIGHNVD
OSV4.3
EPSS
0.5%
top 36.22%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
4
Mozilla FirefoxMozilla Firefox ESRMozilla Thunderbird+1 more
Timeline
PublishedDec 19
Latest updateJan 11

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.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HExploitability: 2.8 | Impact: 5.9

Affected Packages9 packages

▶CVEListV5mozilla/firefoxunspecified — 121
▶NVDmozilla/firefox< 121.0
▶CVEListV5mozilla/firefox_esrunspecified — 115.6
▶NVDmozilla/firefox_esr< 115.6
▶Ubuntumozilla/firefox< 121.0+build1-0ubuntu0.20.04.1

Also affects: Debian Linux 10.0, 11.0, 12.0

🔴Vulnerability Details

6
OSV
firefox regressions↗2024-01-11
▶
OSV
thunderbird vulnerabilities↗2024-01-02
▶
OSV
firefox vulnerabilities↗2024-01-02
▶
GHSA
GHSA-cm9x-r8m9-x222: Firefox was susceptible to a heap buffer overflow in `nsTextFragment` due to insufficient OOM handling↗2023-12-19
▶
CVEList
CVE-2023-6858: Firefox was susceptible to a heap buffer overflow in `nsTextFragment` due to insufficient OOM handling↗2023-12-19
▶

📋Vendor Advisories

7
Ubuntu
Firefox vulnerabilities↗2024-01-02
▶
Ubuntu
Thunderbird vulnerabilities↗2024-01-02
▶
Red Hat
Mozilla: Heap buffer overflow in <code>nsTextFragment</code>↗2023-12-19
▶
Debian
CVE-2023-6858: firefox - Firefox was susceptible to a heap buffer overflow in `nsTextFragment` due to ins...↗2023
▶
Mozilla
Mozilla Foundation Security Advisory 2023-54: CVE-2023-6858↗
▶
CVE-2023-6858 — Out-of-bounds Write in Mozilla Firefox | cvebase