CVE-2020-12426 — Out-of-bounds Write in Mozilla Firefox

CWE-787 — Out-of-bounds WriteCWE-120 — Classic Buffer OverflowCWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer11 documents9 sources
Severity
8.8HIGHNVD
OSV6.5
EPSS
0.8%
top 25.54%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
Mozilla FirefoxMozilla ThunderbirdOpensuse Leap
Timeline
PublishedJul 9
Latest updateMay 24

Description

Mozilla developers and community members reported memory safety bugs present in Firefox 77. 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 Firefox < 78.

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 Packages5 packages

▶CVEListV5mozilla/firefoxunspecified — 78
▶NVDmozilla/firefox< 78.0
▶Ubuntumozilla/firefox< 78.0.1+build1-0ubuntu0.16.04.1+2
▶Ubuntumozilla/thunderbird< 1:78.8.1+build1-0ubuntu0.18.04.1+1
▶NVDopensuse/leap15.1, 15.2+1

Patches

Patch: bugzilla.mozilla.org ↗Patch: bugzilla.mozilla.org ↗

🔴Vulnerability Details

4
GHSA
GHSA-jvpq-rx3j-c85r: Mozilla developers and community members reported memory safety bugs present in Firefox 77↗2022-05-24
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CVEList
CVE-2020-12426: Mozilla developers and community members reported memory safety bugs present in Firefox 77↗2020-07-09
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OSV
firefox vulnerabilities↗2020-07-02
▶
OSV
CVE-2020-12426: Mozilla developers and community members reported memory safety bugs present in Firefox 77↗2020-07-01
▶

📋Vendor Advisories

5
Red Hat
Mozilla: Memory safety bugs fixed in Thunderbird 78↗2020-07-16
▶
Ubuntu
Firefox vulnerabilities↗2020-07-02
▶
Debian
CVE-2020-12426: firefox - Mozilla developers and community members reported memory safety bugs present in ...↗2020
▶
Mozilla
Mozilla Foundation Security Advisory 2020-29: CVE-2020-12426↗
▶
Mozilla
Mozilla Foundation Security Advisory 2020-24: CVE-2020-12426↗
▶

💬Community

1
Bugzilla
CVE-2020-12426 Mozilla: Memory safety bugs fixed in Thunderbird 78↗2020-09-03
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CVE-2020-12426 — Out-of-bounds Write in Mozilla Firefox | cvebase