Vulnerability Monitor

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CVE-2021-29984

Instruction reordering resulted in a sequence of instructions that would cause an object to be incorrectly considered during garbage collection. This led to memory corruption and a potentially exploitable crash. This vulnerability affects Thunderbird < 78.13, Thunderbird < 91, Firefox ESR < 78.13, and Firefox < 91.

Published

2021-08-17T20:15:07.850

Last Modified

2024-11-21T06:02:06.840

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	< 91.0	Yes
Application	mozilla	firefox_esr	< 78.13.0	Yes
Application	mozilla	thunderbird	< 78.13.0	Yes

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1720031 Exploit, Issue Tracking, 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/mfsa2021-33/ Vendor Advisory ([email protected])
https://www.mozilla.org/security/advisories/mfsa2021-34/ Vendor Advisory ([email protected])
https://www.mozilla.org/security/advisories/mfsa2021-35/ Vendor Advisory ([email protected])
https://www.mozilla.org/security/advisories/mfsa2021-36/ Vendor Advisory ([email protected])
https://bugzilla.mozilla.org/show_bug.cgi?id=1720031 Exploit, Issue Tracking, 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/mfsa2021-33/ Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.mozilla.org/security/advisories/mfsa2021-34/ Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.mozilla.org/security/advisories/mfsa2021-35/ Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.mozilla.org/security/advisories/mfsa2021-36/ Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)