Home/CVE/A use-after-free was identified in the `nsDNSService::Init`. This issue appears to manifest rarely during start-up. Thi
CVE

CVE-2023-6862

A use-after-free was identified in the `nsDNSService::Init`. This issue appears to manifest rarely during start-up. Thi

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.

HIGH · CVSS 8.8 EPSS 0.00441
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-416Use After Free
▤

Affected Products & Versions

3
mozilla firefox esr< 115.6
mozilla thunderbird< 115.6
debian linuxall versions
▣

Scoring & Timeline

8.8
HIGH · CVSS v3.1 · security@mozilla.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD19 Dec 2023 · 02:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

24
suse-csafopenSUSE-SU-2024:13519-1
suse-csafSUSE-SU-2024:0044-1
usnUSN-6563-1
suse-csafSUSE-SU-2023:4928-1
suse-csafSUSE-SU-2023:4929-1
🔗

References & Sources

8
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://bugzilla.mozilla.org/show_bug.cgi?id=1868042Issue TrackingPermissions Required
https://lists.debian.org/debian-lts-announce/2023/12/msg00020.htmlMailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2023/12/msg00021.htmlMailing ListThird Party Advisory
https://security.gentoo.org/glsa/202401-10Third Party Advisory
https://www.debian.org/security/2023/dsa-5581Third Party Advisory
https://www.debian.org/security/2023/dsa-5582Third Party Advisory
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