CVE-2021-29945

medium

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.

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1700690

https://www.mozilla.org/security/advisories/mfsa2021-15/

https://www.mozilla.org/security/advisories/mfsa2021-16/

https://www.mozilla.org/security/advisories/mfsa2021-14/

Details

Source: MITRE

Published: 2021-06-24

Updated: 2021-06-30

Type: CWE-682

Risk Information

CVSS v2

Base Score: 4.3

Vector: AV:N/AC:M/Au:N/C:N/I:N/A:P

Impact Score: 2.9

Exploitability Score: 8.6

Severity: MEDIUM

CVSS v3

Base Score: 6.5

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Impact Score: 3.6

Exploitability Score: 2.8

Severity: MEDIUM