CVE-2020-12420 — Race Condition in Mozilla Firefox

CWE-362 — Race ConditionCWE-416 — Use After Free16 documents9 sources
Severity
8.8HIGHNVD
OSV7.5OSV6.5
EPSS
0.4%
top 36.97%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
5
Mozilla FirefoxMozilla Firefox ESRMozilla Thunderbird+2 more
Timeline
PublishedJul 9
Latest updateMay 24

Description

When trying to connect to a STUN server, a race condition could have caused a use-after-free of a pointer, leading to memory corruption and a potentially exploitable crash. This vulnerability affects Firefox ESR < 68.10, Firefox < 78, and Thunderbird < 68.10.0.

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 Packages10 packages

▶CVEListV5mozilla/firefoxunspecified — 78
▶NVDmozilla/firefox< 78.0
▶CVEListV5mozilla/firefox_esrunspecified — 68.10
▶NVDmozilla/firefox_esr< 68.10.0
▶Ubuntumozilla/firefox< 78.0.1+build1-0ubuntu0.16.04.1+2

Also affects: Ubuntu Linux 16.04, 18.04, 19.10, 20.04

🔴Vulnerability Details

5
GHSA
GHSA-g65h-q52v-q3xv: When trying to connect to a STUN server, a race condition could have caused a use-after-free of a pointer, leading to memory corruption and a potentia↗2022-05-24
▶
OSV
CVE-2020-12420: When trying to connect to a STUN server, a race condition could have caused a use-after-free of a pointer, leading to memory corruption and a potentia↗2020-07-09
▶
CVEList
CVE-2020-12420: When trying to connect to a STUN server, a race condition could have caused a use-after-free of a pointer, leading to memory corruption and a potentia↗2020-07-09
▶
OSV
thunderbird vulnerabilities↗2020-07-08
▶
OSV
firefox vulnerabilities↗2020-07-02
▶

📋Vendor Advisories

8
Ubuntu
Thunderbird vulnerabilities↗2020-07-08
▶
Ubuntu
Firefox vulnerabilities↗2020-07-02
▶
Red Hat
Mozilla: Use-After-Free when trying to connect to a STUN server↗2020-06-30
▶
Debian
CVE-2020-12420: firefox - When trying to connect to a STUN server, a race condition could have caused a us...↗2020
▶
Mozilla
Mozilla Foundation Security Advisory 2020-25: CVE-2020-12420↗
▶

💬Community

2
Bugzilla
CVE-2020-12420 Mozilla: Use-After-Free when trying to connect to a STUN server↗2020-07-01
▶
Bugzilla
CVE-2019-12420 spamassassin: crafted email message can lead to DoS↗2019-12-18
▶
CVE-2020-12420 — Race Condition in Mozilla Firefox | cvebase