CVE-2021-38500
First published: Tue Oct 05 2021(Updated: )
Mozilla developers and community members Andreas Pehrson and Christian Holler reported memory safety bugs present in Firefox 92 and Firefox ESR 91.1. 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 security@mozilla.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Mozilla Thunderbird | <91.2 | 91.2 |
| 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 | |
| Mozilla Firefox ESR | <91.2 | 91.2 |
| Mozilla Firefox ESR | <78.15 | 78.15 |
| Mozilla Firefox | <93 | 93 |
| Mozilla Firefox | <93.0 | |
| Mozilla Firefox ESR | <78.15 | |
| Mozilla Firefox ESR | >=91.0<91.2 | |
| Mozilla Thunderbird | <78.15 | |
| Mozilla Thunderbird | >=91.0<91.2 | |
| Debian Debian Linux | =9.0 | |
| Debian Debian Linux | =10.0 | |
| Debian Debian Linux | =11.0 | |
| Mozilla Firefox | >=91.0<91.2 |
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Reference Links
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=1725854%2C1728321
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-47/
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-43/
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-44/
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-45/
- https://lists.debian.org/debian-lts-announce/2022/01/msg00001.html
- https://www.debian.org/security/2022/dsa-5034
- https://www.mozilla.org/security/advisories/mfsa2021-43/
- https://www.mozilla.org/security/advisories/mfsa2021-44/
- https://www.mozilla.org/security/advisories/mfsa2021-45/
- https://www.mozilla.org/security/advisories/mfsa2021-46/
- https://www.mozilla.org/security/advisories/mfsa2021-47/
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-43/#CVE-2021-38500
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-44/#CVE-2021-38500
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-45/#CVE-2021-38500
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-46/#CVE-2021-38500
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-47/#CVE-2021-38500
- https://security-tracker.debian.org/tracker/CVE-2021-38500
Parent vulnerabilities
(Appears in the following advisories)
Peer vulnerabilities
(Found alongside the following vulnerabilities)
Frequently Asked Questions
What is the vulnerability ID of this vulnerability?
The vulnerability ID is CVE-2021-38500.
What is the severity of CVE-2021-38500?
The severity of CVE-2021-38500 is high with a severity score of 8.8.
Which software is affected by CVE-2021-38500?
Firefox versions up to and excluding 93, Firefox ESR versions up to and excluding 78.15, and Thunderbird versions up to and excluding 78.15 are affected by CVE-2021-38500.
How can I fix CVE-2021-38500?
Updating to Firefox version 93, Firefox ESR version 78.15, or Thunderbird version 78.15 will fix CVE-2021-38500.
Where can I find more information about CVE-2021-38500?
You can find more information about CVE-2021-38500 at the following references: [Mozilla Bugzilla](https://bugzilla.mozilla.org/buglist.cgi?bug_id=1725854%2C1728321), [Mozilla Security Advisories](https://www.mozilla.org/en-US/security/advisories/mfsa2021-47/), [Debian LTS Announcement](https://lists.debian.org/debian-lts-announce/2022/01/msg00001.html).
- collector/mozilla-advisory
- collector/security-tracker-debian
- agent/type
- agent/first-publish-date
- source/Mozilla
- agent/software-canonical-lookup
- agent/severity
- agent/references
- agent/description
- agent/software-canonical-lookup-request
- collector/nvd-index
- collector/mitre-cve
- source/MITRE
- collector/nvd-api
- source/NVD
- agent/author
- agent/last-modified-date
- agent/softwarecombine
- agent/tags
- agent/event
- vendor/mozilla
- canonical/mozilla thunderbird
- package-manager/debian
- canonical/mozilla firefox esr
- canonical/mozilla firefox
- version/mozilla firefox esr/91.0
- version/mozilla thunderbird/91.0
- vendor/debian
- canonical/debian debian linux
- version/debian debian linux/9.0
- version/debian debian linux/10.0
- version/debian debian linux/11.0
- version/mozilla firefox/91.0