CVE-2023-6858

Severity CVSS v4.0:

Pending analysis

Type:

CWE-787 Out-of-bounds Write

Publication date:

19/12/2023

Last modified:

07/05/2025

Description

Firefox was susceptible to a heap buffer overflow in `nsTextFragment` due to insufficient OOM handling. This vulnerability affects Firefox ESR

Impact

Vector 3.x

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 8.80 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

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

Base Score 3.x

8.80

Severity 3.x

HIGH

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:a:mozilla:firefox::::::::		121.0 (excluding)
cpe:2.3:a:mozilla:firefox_esr::::::::		115.6 (excluding)
cpe:2.3:a:mozilla:thunderbird::::::::		115.6 (excluding)
cpe:2.3:o:debian:debian_linux:10.0:::::::*
cpe:2.3:o:debian:debian_linux:11.0:::::::*
cpe:2.3:o:debian:debian_linux:12.0:::::::*

To consult the complete list of CPE names with products and versions, see this page

CVE-2023-6858

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools