CVE-2021-43536: Infoleak
First published: Tue Dec 07 2021(Updated: )
Under certain circumstances, asynchronous functions could have caused a navigation to fail but expose the target URL.
Credit: security@mozilla.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/firefox | 118.0.2-1 | |
| debian/firefox-esr | 91.12.0esr-1~deb10u1 115.3.1esr-1~deb10u1 102.15.0esr-1~deb11u1 115.3.1esr-1~deb11u1 102.15.1esr-1~deb12u1 115.3.0esr-1~deb12u1 115.3.0esr-1 115.4.0esr-1 | |
| debian/thunderbird | 1:91.12.0-1~deb10u1 1:115.3.1-1~deb10u1 1:102.13.1-1~deb11u1 1:115.3.1-1~deb11u1 1:102.15.1-1~deb12u1 1:115.3.1-1~deb12u1 1:115.3.1-1 | |
| Thunderbird | <91.4 | 91.4 |
| Firefox | <95.0 | |
| Firefox ESR | <91.4.0 | |
| Thunderbird | <91.4.0 | |
| Debian | =9.0 | |
| Debian | =10.0 | |
| Debian | =11.0 | |
| Firefox | <95 | 95 |
| Firefox ESR | <91.4 | 91.4 |
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Reference Links
- https://bugzilla.mozilla.org/show_bug.cgi?id=1730120
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-54/
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-52/
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-53/
- https://lists.debian.org/debian-lts-announce/2021/12/msg00030.html
- https://lists.debian.org/debian-lts-announce/2022/01/msg00001.html
- https://security.gentoo.org/glsa/202202-03
- https://security.gentoo.org/glsa/202208-14
- https://www.debian.org/security/2021/dsa-5026
- https://www.debian.org/security/2022/dsa-5034
- https://www.mozilla.org/security/advisories/mfsa2021-52/
- https://www.mozilla.org/security/advisories/mfsa2021-53/
- https://www.mozilla.org/security/advisories/mfsa2021-54/
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-52/#CVE-2021-43536
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-53/#CVE-2021-43536
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-54/#CVE-2021-43536
- https://security-tracker.debian.org/tracker/CVE-2021-43536
Peer vulnerabilities
(Found alongside the following vulnerabilities)
Frequently Asked Questions
What is the severity of CVE-2021-43536?
CVE-2021-43536 has a moderate severity rating and can potentially expose sensitive URL information.
How do I fix CVE-2021-43536?
To fix CVE-2021-43536, update Thunderbird to version 91.4.0 or later, and Firefox ESR to version 91.4.0 or later.
Which software versions are affected by CVE-2021-43536?
CVE-2021-43536 affects Thunderbird versions prior to 91.4.0 and Firefox ESR versions prior to 91.4.0.
Can CVE-2021-43536 be exploited remotely?
Yes, CVE-2021-43536 can be exploited remotely under certain conditions due to the exposure of target URLs.
What platforms are impacted by CVE-2021-43536?
CVE-2021-43536 impacts platforms running affected versions of Thunderbird and Firefox, including Debian Linux distributions.
- collector/security-tracker-debian
- agent/first-publish-date
- agent/type
- agent/severity
- agent/references
- agent/weakness
- agent/description
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- agent/event
- agent/trending
- agent/source
- agent/author
- collector/mozilla-advisory
- agent/software-canonical-lookup-request
- source/Mozilla
- agent/software-canonical-lookup
- collector/nvd-api
- source/NVD
- collector/nvd-index
- agent/softwarecombine
- agent/tags
- package-manager/debian
- vendor/mozilla
- canonical/thunderbird
- canonical/firefox
- canonical/firefox esr
- vendor/debian
- canonical/debian
- version/debian/9.0
- version/debian/10.0
- version/debian/11.0