CVE-2020-26971 — Out-of-bounds Write in Mozilla Firefox

CWE-787 — Out-of-bounds WriteCWE-120 — Classic Buffer Overflow12 documents8 sources
Severity
8.8HIGHNVD
OSV6.5
EPSS
1.1%
top 22.33%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
Mozilla FirefoxMozilla Firefox ESRMozilla Thunderbird
Timeline
PublishedJan 7
Latest updateMay 24

Description

Certain blit values provided by the user were not properly constrained leading to a heap buffer overflow on some video drivers. This vulnerability affects Firefox < 84, Thunderbird < 78.6, and Firefox ESR < 78.6.

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 — 84
▶NVDmozilla/firefox< 84.0
▶CVEListV5mozilla/firefox_esrunspecified — 78.6
▶NVDmozilla/firefox_esr< 78.6.0
▶Ubuntumozilla/firefox< 84.0+build3-0ubuntu0.16.04.1+2

🔴Vulnerability Details

4
GHSA
GHSA-x6rc-q735-q8qg: Certain blit values provided by the user were not properly constrained leading to a heap buffer overflow on some video drivers↗2022-05-24
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CVEList
CVE-2020-26971: Certain blit values provided by the user were not properly constrained leading to a heap buffer overflow on some video drivers↗2021-01-07
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OSV
CVE-2020-26971: Certain blit values provided by the user were not properly constrained leading to a heap buffer overflow on some video drivers↗2021-01-07
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OSV
firefox vulnerabilities↗2020-12-15
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📋Vendor Advisories

7
Ubuntu
Thunderbird vulnerabilities↗2021-01-20
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Red Hat
Mozilla: Heap buffer overflow in WebGL↗2020-12-15
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Ubuntu
Firefox vulnerabilities↗2020-12-15
▶
Debian
CVE-2020-26971: firefox - Certain blit values provided by the user were not properly constrained leading t...↗2020
▶
Mozilla
Mozilla Foundation Security Advisory 2020-54: CVE-2020-26971↗
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CVE-2020-26971 — Out-of-bounds Write in Mozilla Firefox | cvebase