CVE-2021-29988 — Out-of-bounds Read in Mozilla Firefox

CWE-125 — Out-of-bounds ReadCWE-787 — Out-of-bounds WriteCWE-436 — Interpretation ConflictCWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer13 documents8 sources
Severity
8.8HIGHNVD
OSV5.9
EPSS
0.6%
top 29.92%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
Mozilla FirefoxMozilla Firefox ESRMozilla Thunderbird
Timeline
PublishedAug 17
Latest updateMay 24

Description

Firefox incorrectly treated an inline list-item element as a block element, resulting in an out of bounds read or memory corruption, and a potentially exploitable crash. This vulnerability affects Thunderbird < 78.13, Thunderbird < 91, Firefox ESR < 78.13, and Firefox < 91.

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 — 91
▶NVDmozilla/firefox< 91.0
▶CVEListV5mozilla/firefox_esrunspecified — 78.13
▶NVDmozilla/firefox_esr< 78.13.0
▶CVEListV5mozilla/thunderbirdunspecified — 78.13+1

🔴Vulnerability Details

4
GHSA
GHSA-rqrh-6wcg-wqw7: Firefox incorrectly treated an inline list-item element as a block element, resulting in an out of bounds read or memory corruption, and a potentially↗2022-05-24
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OSV
thunderbird vulnerabilities↗2021-08-31
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CVEList
CVE-2021-29988: Firefox incorrectly treated an inline list-item element as a block element, resulting in an out of bounds read or memory corruption, and a potentially↗2021-08-17
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OSV
CVE-2021-29988: Firefox incorrectly treated an inline list-item element as a block element, resulting in an out of bounds read or memory corruption, and a potentially↗2021-08-17
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📋Vendor Advisories

8
Ubuntu
Thunderbird vulnerabilities↗2021-08-31
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Ubuntu
Firefox vulnerabilities↗2021-08-11
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Red Hat
Mozilla: Memory corruption as a result of incorrect style treatment↗2021-08-10
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Debian
CVE-2021-29988: firefox - Firefox incorrectly treated an inline list-item element as a block element, resu...↗2021
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Mozilla
Mozilla Foundation Security Advisory 2021-36: CVE-2021-29988↗
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CVE-2021-29988 — Out-of-bounds Read in Mozilla Firefox | cvebase