CVE-2023-6862 — Use After Free in Mozilla Firefox ESR

CWE-416 — Use After Free10 documents8 sources
Severity
8.8HIGHNVD
OSV4.3
EPSS
0.4%
top 41.33%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
Mozilla Firefox ESRMozilla ThunderbirdDebian Linux
Timeline
PublishedDec 19
Latest updateJan 2

Description

A use-after-free was identified in the `nsDNSService::Init`. This issue appears to manifest rarely during start-up. This vulnerability affects Firefox ESR < 115.6 and Thunderbird < 115.6.

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 Packages6 packages

▶CVEListV5mozilla/firefox_esrunspecified — 115.6
▶CVEListV5mozilla/thunderbirdunspecified — 115.6
▶NVDmozilla/firefox_esr< 115.6
▶NVDmozilla/thunderbird< 115.6
▶Debianmozilla/thunderbird< 1:115.6.0-1~deb11u1+3

Also affects: Debian Linux 10.0, 11.0, 12.0

🔴Vulnerability Details

4
OSV
thunderbird vulnerabilities↗2024-01-02
▶
GHSA
GHSA-5x56-7cpg-238g: A use-after-free was identified in the `nsDNSService::Init`↗2023-12-19
▶
OSV
CVE-2023-6862: A use-after-free was identified in the `nsDNSService::Init`↗2023-12-19
▶
CVEList
CVE-2023-6862: A use-after-free was identified in the `nsDNSService::Init`↗2023-12-19
▶

📋Vendor Advisories

5
Ubuntu
Thunderbird vulnerabilities↗2024-01-02
▶
Red Hat
Mozilla: Use-after-free in <code>nsDNSService</code>↗2023-12-19
▶
Debian
CVE-2023-6862: firefox-esr - A use-after-free was identified in the `nsDNSService::Init`. This issue appears...↗2023
▶
Mozilla
Mozilla Foundation Security Advisory 2023-54: CVE-2023-6862↗
▶
Mozilla
Mozilla Foundation Security Advisory 2023-55: CVE-2023-6862↗
▶
CVE-2023-6862 — Use After Free in Mozilla Firefox ESR | cvebase