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CVE-2023-6858

Date: December 19, 2023

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.

Language: C++

Severity Score

8.8

Related Resources (12)

Url: https://nvd.nist.gov/vuln/detail/CVE-2023-6858

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

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

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

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

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

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

Url: https://security-tracker.debian.org/tracker/CVE-2023-6858

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

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

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

Url: https://www.mend.io/vulnerability-database/CVE-2023-6858

Severity Score

8.8

Weakness Type (CWE)

Out-of-bounds Write

CWE-787

CVSS v3.1

Base Score:	8.8
Attack Vector (AV):	NETWORK
Attack Complexity (AC):	LOW
Privileges Required (PR):	NONE
User Interaction (UI):	REQUIRED
Scope (S):	UNCHANGED
Confidentiality (C):	HIGH
Integrity (I):	HIGH
Availability (A):	HIGH

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