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Vulnerability Intelligence

CVE-2021-38495 | Mondoo Vulnerability Intelligence

Vulnerability IntelligenceCVE-2021-38495

CVE-2021-38495

HIGH8.8

Mozilla developers reported memory safety bugs present in Thunderbird 78

Published Nov 3, 2021

Modified 1 years ago

Fix available

Details

Mozilla developers reported memory safety bugs present in Thunderbird 78.13.0. 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 < 91.1 and Firefox ESR < 91.1.

Affected Packages

Mozilla Firefox ESR

Windows 10 (1507)Windows 10 (1607) / Server 2016Windows 10 (1809) / Server 2019Windows 10 (1903)Windows 10 (1909)

Fixed in:

91.1

Firefox ESR

macOS 14macOS 15macOS 26

Fixed in:

91.1

References

https://bugzilla.mozilla.org/buglist.cgi?bug_id=1723391%2C1723920%2C1724101%2C1724107

https://security.gentoo.org/glsa/202202-03

https://security.gentoo.org/glsa/202208-14

https://www.cve.org/CVERecord?id=CVE-2021-38495

https://www.mozilla.org/security/advisories/mfsa2021-40/

https://www.mozilla.org/security/advisories/mfsa2021-41/

CVSS Analysis

CVSS v3.1

8.8

Exploitability

Attack Vector

NetworkAV:N

Attack Complexity

LowAC:L

Privileges Required

NonePR:N

User Interaction

RequiredUI:R

Scope

Scope

UnchangedS:U

Impact

Confidentiality

HighC:H

Integrity

HighI:H

Availability

HighA:H

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

Ecosystems(20)

Windows 10 (1507)Windows 10 (1607) / Server 2016 Windows 10 (1809) / Server 2019 Windows 10 (1903)Windows 10 (1909)

Timeline

PublishedNov 3, 2021

ModifiedAug 4, 2024