Vulnerability Monitor

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CVE-2021-29976

Mozilla developers reported memory safety bugs present in code shared between Firefox and Thunderbird. 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 Thunderbird < 78.12, Firefox ESR < 78.12, and Firefox < 90.

Published

2021-08-05T20:15:08.773

Last Modified

2024-11-21T06:02:05.887

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 8.8 (HIGH)

CVSSv2 Vector

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

Access Vector: NETWORK
Access Complexity: MEDIUM
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: PARTIAL
Availability Impact: PARTIAL

Exploitability Score

8.6

Impact Score

6.4

Weaknesses

Type: Primary
CWE-787

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	mozilla	firefox	< 90.0	Yes
Application	mozilla	firefox_esr	< 78.12	Yes
Application	mozilla	thunderbird	< 78.12	Yes

References

https://bugzilla.mozilla.org/buglist.cgi?bug_id=1700895%2C1703334%2C1706910%2C1711576%2C1714391 Vendor Advisory ([email protected])
https://security.gentoo.org/glsa/202202-03 Third Party Advisory ([email protected])
https://security.gentoo.org/glsa/202208-14 Third Party Advisory ([email protected])
https://www.mozilla.org/security/advisories/mfsa2021-28/ Vendor Advisory ([email protected])
https://www.mozilla.org/security/advisories/mfsa2021-29/ Vendor Advisory ([email protected])
https://www.mozilla.org/security/advisories/mfsa2021-30/ Vendor Advisory ([email protected])
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1700895%2C1703334%2C1706910%2C1711576%2C1714391 Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://security.gentoo.org/glsa/202202-03 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://security.gentoo.org/glsa/202208-14 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.mozilla.org/security/advisories/mfsa2021-28/ Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.mozilla.org/security/advisories/mfsa2021-29/ Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.mozilla.org/security/advisories/mfsa2021-30/ Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)