CVE-2021-23964
First published: Tue Jan 26 2021(Updated: )
Mozilla developers Alexis Beingessner, Christian Holler, Andrew McCreight, Tyson Smith, Jon Coppeard, André Bargull, Jason Kratzer, Jesse Schwartzentruber, Steve Fink, Byron Campen reported memory safety bugs present in Firefox 84 and Firefox ESR 78.6. 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.
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 | |
| 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 | <78.7 | 78.7 |
| Firefox | <85.0 | |
| Firefox ESR | <78.7 | |
| Thunderbird | <78.7 | |
| Firefox | <85 | 85 |
| Firefox ESR | <78.7 | 78.7 |
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Reference Links
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=1662507%2C1666285%2C1673526%2C1674278%2C1674835%2C1675097%2C1675844%2C1675868%2C1677590%2C1677888%2C1680410%2C1681268%2C1682068%2C1682938%2C1683736%2C1685260%2C1685925
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-05/
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-03/
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-04/
- https://www.mozilla.org/security/advisories/mfsa2021-03/
- https://www.mozilla.org/security/advisories/mfsa2021-04/
- https://www.mozilla.org/security/advisories/mfsa2021-05/
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-04/#CVE-2021-23964
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-03/#CVE-2021-23964
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-05/#CVE-2021-23964
- https://security-tracker.debian.org/tracker/CVE-2021-23964
Peer vulnerabilities
(Found alongside the following vulnerabilities)
Frequently Asked Questions
What is the severity of CVE-2021-23964?
CVE-2021-23964 is a memory safety vulnerability that can potentially be exploited, requiring immediate attention.
How do I fix CVE-2021-23964?
To fix CVE-2021-23964, update your Mozilla Firefox to version 85 or Mozilla Thunderbird to version 78.7.
Which versions are affected by CVE-2021-23964?
CVE-2021-23964 affects Firefox versions prior to 85 and Thunderbird versions prior to 78.7.
Is there a workaround for CVE-2021-23964?
There are no known workarounds for CVE-2021-23964; updating to the latest versions is the recommended action.
Can CVE-2021-23964 cause data loss?
CVE-2021-23964 has the potential to lead to data corruption or loss if exploited.
- collector/security-tracker-debian
- agent/type
- agent/first-publish-date
- agent/references
- agent/weakness
- agent/author
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- collector/mitre-cve
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- source/Mozilla
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- collector/nvd-index
- agent/tags
- agent/softwarecombine
- package-manager/debian
- vendor/mozilla
- canonical/thunderbird
- canonical/firefox
- canonical/firefox esr