CVE-2023-5171 — Use After Free in Mozilla Firefox

CWE-416 — Use After Free14 documents8 sources
Severity
6.5MEDIUMNVD
OSV8.8
EPSS
0.3%
top 50.56%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
5
Mozilla FirefoxMozilla Firefox ESRMozilla Thunderbird+2 more
Timeline
PublishedSep 27
Latest updateOct 11

Description

During Ion compilation, a Garbage Collection could have resulted in a use-after-free condition, allowing an attacker to write two NUL bytes, and cause a potentially exploitable crash. This vulnerability affects Firefox < 118, Firefox ESR < 115.3, and Thunderbird < 115.3.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:HExploitability: 2.8 | Impact: 3.6

Affected Packages9 packages

▶CVEListV5mozilla/firefoxunspecified — 118
▶NVDmozilla/firefox< 118
▶CVEListV5mozilla/firefox_esrunspecified — 115.3
▶NVDmozilla/firefox_esr< 115.3
▶Ubuntumozilla/firefox< 118.0.1+build1-0ubuntu0.20.04.1

Also affects: Debian Linux 10.0, 11.0, 12.0, Fedora 39

Patches

Patch: lists.debian.org ↗Patch: www.debian.org ↗Patch: lists.debian.org ↗

🔴Vulnerability Details

6
OSV
firefox regressions↗2023-10-11
▶
OSV
firefox vulnerabilities↗2023-10-03
▶
OSV
thunderbird vulnerabilities↗2023-10-03
▶
OSV
CVE-2023-5171: During Ion compilation, a Garbage Collection could have resulted in a use-after-free condition, allowing an attacker to write two NUL bytes, and cause↗2023-09-27
▶
GHSA
GHSA-v567-j6g5-phvx: During Ion compilation, a Garbage Collection could have resulted in a use-after-free condition, allowing an attacker to write two NUL bytes, and cause↗2023-09-27
▶

📋Vendor Advisories

7
Ubuntu
Thunderbird vulnerabilities↗2023-10-03
▶
Ubuntu
Firefox vulnerabilities↗2023-10-03
▶
Red Hat
Mozilla: Use-after-free in Ion Compiler↗2023-09-26
▶
Debian
CVE-2023-5171: firefox - During Ion compilation, a Garbage Collection could have resulted in a use-after-...↗2023
▶
Mozilla
Mozilla Foundation Security Advisory 2023-42: CVE-2023-5171↗
▶
CVE-2023-5171 — Use After Free in Mozilla Firefox | cvebase