Vulnerability CVE-2021-43542: Information

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.

Severity: MEDIUM (6.5) Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

URL: https://nvd.nist.gov/vuln/detail/CVE-2021-43542
Published: Dec. 9, 2021
Modified: Dec. 9, 2022
Error type identifier: CWE-209

Fixed packages

Package name
Branch
Fixed in version
Version from repository
Errata ID
Task #
State
firefoxsisyphus95.0-alt1126.0.1-alt1ALT-PU-2021-3496-1291654Fixed
firefoxp1095.0.1-alt1118.0.2-alt0.p10.1ALT-PU-2021-3576-1291719Fixed
firefoxp9105.0.1-alt0.c9.1105.0.1-alt0.c9.1ALT-PU-2023-4339-1319683Fixed
firefoxc10f195.0.1-alt1112.0.2-alt0.p10.1ALT-PU-2021-3576-1291719Fixed
firefoxc9f2105.0.1-alt0.c9.1105.0.1-alt0.c9.1ALT-PU-2023-1139-1309126Fixed
firefoxp1195.0-alt1126.0.1-alt1ALT-PU-2021-3496-1291654Fixed
firefox-esrsisyphus91.4.0-alt1115.11.0-alt1ALT-PU-2021-3493-1291513Fixed
firefox-esrp1091.4.0-alt1115.11.0-alt1ALT-PU-2021-3533-1291601Fixed
firefox-esrp991.7.0-alt0.p9.1102.11.0-alt0.c9.1ALT-PU-2022-1781-1288073Fixed
firefox-esrc10f191.4.0-alt1115.9.1-alt0.c10.1ALT-PU-2021-3533-1291601Fixed
firefox-esrc9f291.4.0-alt0.c9.1102.12.0-alt0.c9.1ALT-PU-2021-3506-1291602Fixed
firefox-esrp1191.4.0-alt1115.11.0-alt1ALT-PU-2021-3493-1291513Fixed
thunderbirdsisyphus91.4.0-alt1115.9.0-alt1ALT-PU-2021-3510-1291721Fixed
thunderbirdp1091.4.0-alt1115.9.0-alt1ALT-PU-2021-3582-1291741Fixed
thunderbirdp991.6.0-alt0.p9.1102.11.0-alt0.c9.1ALT-PU-2022-1783-1288073Fixed
thunderbirdc10f191.4.0-alt1115.9.0-alt0.c10.1ALT-PU-2021-3582-1291741Fixed
thunderbirdc9f291.4.0-alt0.c9.1102.11.0-alt0.c9.1ALT-PU-2021-3541-1291895Fixed
thunderbirdp1191.4.0-alt1115.9.0-alt1ALT-PU-2021-3510-1291721Fixed

References to Advisories, Solutions, and Tools

Hyperlink
Resource
https://www.mozilla.org/security/advisories/mfsa2021-52/
  • Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2021-54/
  • Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2021-53/
  • Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1723281
  • Issue Tracking
  • Permissions Required
  • Vendor Advisory
DSA-5026
  • Third Party Advisory
[debian-lts-announce] 20211229 [SECURITY] [DLA 2863-1] firefox-esr security update
  • Mailing List
  • Third Party Advisory
DSA-5034
  • Third Party Advisory
[debian-lts-announce] 20220104 [SECURITY] [DLA 2874-1] thunderbird security update
  • Mailing List
  • Third Party Advisory
GLSA-202202-03
  • Third Party Advisory
GLSA-202208-14
  • Third Party Advisory

    1. Configuration 1

      cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*
      End excliding
      91.4.0
      cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
      End excliding
      91.4.0
      cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
      End excliding
      95.0

      Configuration 2

      cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
      cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
      cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
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