CVE-2021-43542

medium

Description

Using XMLHttpRequest, an attacker could have identified installed applications by probing error messages for loading external protocols. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and Firefox < 95.

References

https://www.mozilla.org/security/advisories/mfsa2021-54/

https://www.mozilla.org/security/advisories/mfsa2021-53/

https://www.mozilla.org/security/advisories/mfsa2021-52/

https://www.debian.org/security/2022/dsa-5034

https://www.debian.org/security/2021/dsa-5026

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

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

https://lists.debian.org/debian-lts-announce/2022/01/msg00001.html

https://lists.debian.org/debian-lts-announce/2021/12/msg00030.html

https://bugzilla.mozilla.org/show_bug.cgi?id=1723281

Details

Source: Mitre, NVD

Published: 2021-12-08

Updated: 2024-11-21

Risk Information

CVSS v2

Base Score: 4.3

Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:N/A:N

Severity: Medium

CVSS v3

Base Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N