CVE-2021-38500 — Classic Buffer Overflow in Mozilla Firefox

CWE-120 — Classic Buffer Overflow14 documents8 sources
Severity
8.8HIGHNVD
EPSS
1.1%
top 22.03%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
4
Mozilla FirefoxMozilla Firefox ESRMozilla Thunderbird+1 more
Timeline
PublishedNov 3
Latest updateMay 24

Description

Mozilla developers reported memory safety bugs present in Firefox 92 and Firefox ESR 91.1. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Thunderbird < 78.15, Thunderbird < 91.2, Firefox ESR < 91.2, Firefox ESR < 78.15, and Firefox < 93.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HExploitability: 2.8 | Impact: 5.9

Affected Packages8 packages

▶CVEListV5mozilla/firefoxunspecified — 93
▶NVDmozilla/firefox91.0 — 91.2+1
▶CVEListV5mozilla/firefox_esrunspecified — 91.2+1
▶NVDmozilla/firefox_esr< 78.15
▶CVEListV5mozilla/thunderbirdunspecified — 78.15+1

Also affects: Debian Linux 10.0, 11.0, 9.0

🔴Vulnerability Details

4
GHSA
GHSA-pv72-mgh4-jqvg: Mozilla developers reported memory safety bugs present in Firefox 92 and Firefox ESR 91↗2022-05-24
▶
OSV
thunderbird vulnerabilities↗2022-01-21
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CVEList
CVE-2021-38500: Mozilla developers reported memory safety bugs present in Firefox 92 and Firefox ESR 91↗2021-11-03
▶
OSV
CVE-2021-38500: Mozilla developers reported memory safety bugs present in Firefox 92 and Firefox ESR 91↗2021-11-03
▶

📋Vendor Advisories

9
Ubuntu
Thunderbird vulnerabilities↗2022-01-21
▶
Ubuntu
Thunderbird vulnerabilities↗2021-11-03
▶
Ubuntu
Firefox vulnerabilities↗2021-10-07
▶
Red Hat
Mozilla: Memory safety bugs fixed in Firefox 93, Firefox ESR 78.15, and Firefox ESR 91.2↗2021-10-05
▶
Debian
CVE-2021-38500: firefox - Mozilla developers reported memory safety bugs present in Firefox 92 and Firefox...↗2021
▶
CVE-2021-38500 — Classic Buffer Overflow in Mozilla | cvebase