CVE-2021-29945 — Incorrect Calculation in Mozilla Firefox

CWE-682 — Incorrect CalculationCWE-476 — NULL Pointer Dereference15 documents8 sources
Severity
6.5MEDIUMNVD
OSV8.8OSV7.4
EPSS
0.4%
top 38.72%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
Mozilla FirefoxMozilla Firefox ESRMozilla Thunderbird
Timeline
PublishedJun 24
Latest updateMay 24

Description

The WebAssembly JIT could miscalculate the size of a return type, which could lead to a null read and result in a crash. *Note: This issue only affected x86-32 platforms. Other platforms are unaffected.*. This vulnerability affects Firefox ESR < 78.10, Thunderbird < 78.10, and Firefox < 88.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:HExploitability: 2.8 | Impact: 3.6

Affected Packages9 packages

▶CVEListV5mozilla/firefoxunspecified — 88
▶NVDmozilla/firefox< 88.0
▶CVEListV5mozilla/firefox_esrunspecified — 78.10
▶NVDmozilla/firefox_esr< 78.10
▶Ubuntumozilla/firefox< 88.0+build2-0ubuntu0.16.04.1+2

🔴Vulnerability Details

6
GHSA
GHSA-79cg-jg39-89hq: The WebAssembly JIT could miscalculate the size of a return type, which could lead to a null read and result in a crash↗2022-05-24
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OSV
thunderbird vulnerabilities↗2021-06-25
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CVEList
CVE-2021-29945: The WebAssembly JIT could miscalculate the size of a return type, which could lead to a null read and result in a crash↗2021-06-24
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OSV
CVE-2021-29945: The WebAssembly JIT could miscalculate the size of a return type, which could lead to a null read and result in a crash↗2021-06-24
▶
OSV
thunderbird vulnerabilities↗2021-06-22
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📋Vendor Advisories

8
Ubuntu
Thunderbird vulnerabilities↗2021-06-25
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Ubuntu
Thunderbird vulnerabilities↗2021-06-22
▶
Ubuntu
Firefox vulnerabilities↗2021-04-26
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Red Hat
Mozilla: Incorrect size computation in WebAssembly JIT could lead to null-reads↗2021-04-19
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Debian
CVE-2021-29945: firefox - The WebAssembly JIT could miscalculate the size of a return type, which could le...↗2021
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CVE-2021-29945 — Incorrect Calculation in Mozilla | cvebase