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Vulnerability Details : CVE-2021-43539

Failure to correctly record the location of live pointers across wasm instance calls resulted in a GC occurring within the call not tracing those live pointers. This could have led to a use-after-free causing a potentially exploitable crash. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and Firefox < 95.
Publish Date : 2021-12-08 Last Update Date : 2022-03-16
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- CVSS Scores & Vulnerability Types

CVSS Score
6.8
Confidentiality Impact Partial (There is considerable informational disclosure.)
Integrity Impact Partial (Modification of some system files or information is possible, but the attacker does not have control over what can be modified, or the scope of what the attacker can affect is limited.)
Availability Impact Partial (There is reduced performance or interruptions in resource availability.)
Access Complexity Medium (The access conditions are somewhat specialized. Some preconditions must be satistified to exploit)
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s)
CWE ID 416

- Related OVAL Definitions

Title Definition Id Class Family
RHSA-2021:5013: firefox security update (Important) oval:com.redhat.rhsa:def:20215013 unix
RHSA-2021:5014: firefox security update (Important) oval:com.redhat.rhsa:def:20215014 unix
RHSA-2021:5045: thunderbird security update (Important) oval:com.redhat.rhsa:def:20215045 unix
RHSA-2021:5046: thunderbird security update (Important) oval:com.redhat.rhsa:def:20215046 unix
OVAL (Open Vulnerability and Assessment Language) definitions define exactly what should be done to verify a vulnerability or a missing patch. Check out the OVAL definitions if you want to learn what you should do to verify a vulnerability.

- Products Affected By CVE-2021-43539

# Product Type Vendor Product Version Update Edition Language
1 OS Debian Debian Linux 9.0 * * * Version Details Vulnerabilities
2 OS Debian Debian Linux 10.0 * * * Version Details Vulnerabilities
3 OS Debian Debian Linux 11.0 * * * Version Details Vulnerabilities
4 Application Mozilla Firefox * * * * Version Details Vulnerabilities
5 Application Mozilla Firefox Esr * * * * Version Details Vulnerabilities
6 Application Mozilla Thunderbird * * * * Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Debian Debian Linux 3
Mozilla Firefox 1
Mozilla Firefox Esr 1
Mozilla Thunderbird 1

- References For CVE-2021-43539

https://lists.debian.org/debian-lts-announce/2021/12/msg00030.html
MLIST [debian-lts-announce] 20211229 [SECURITY] [DLA 2863-1] firefox-esr security update
https://www.mozilla.org/security/advisories/mfsa2021-53/
https://security.gentoo.org/glsa/202202-03
GENTOO GLSA-202202-03
https://lists.debian.org/debian-lts-announce/2022/01/msg00001.html
MLIST [debian-lts-announce] 20220104 [SECURITY] [DLA 2874-1] thunderbird security update
https://www.debian.org/security/2022/dsa-5034
DEBIAN DSA-5034
https://www.debian.org/security/2021/dsa-5026
DEBIAN DSA-5026
https://www.mozilla.org/security/advisories/mfsa2021-54/
https://bugzilla.mozilla.org/show_bug.cgi?id=1739683
https://www.mozilla.org/security/advisories/mfsa2021-52/

- Metasploit Modules Related To CVE-2021-43539

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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