CVE-2023-6862
HIGHFirefox ESR < 115.6 and Thunderbird < 115.6 - Use-After-Free in nsDNSService::Init
Title source: llmDescription
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.
References (8)
Core 8
Core References
Issue Tracking, Permissions Required
https://bugzilla.mozilla.org/show_bug.cgi?id=1868042
Mailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/12/msg00020.html
Mailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/12/msg00021.html
Third Party Advisory
https://security.gentoo.org/glsa/202401-10
Third Party Advisory
https://www.debian.org/security/2023/dsa-5581
Third Party Advisory
https://www.debian.org/security/2023/dsa-5582
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-54/
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-55/
Scores
CVSS v3
8.8
EPSS
0.0044
EPSS Percentile
63.4%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
total
Details
CWE
CWE-416
Status
published
Products (5)
debian/debian_linux
10.0
debian/debian_linux
11.0
debian/debian_linux
12.0
mozilla/firefox_esr
< 115.6
mozilla/thunderbird
< 115.6
Published
Dec 19, 2023
Tracked Since
Feb 18, 2026