CVE-2021-29946: Integer Overflow
First published: Mon Apr 19 2021(Updated: )
Ports that were written as an integer overflow above the bounds of a 16-bit integer could have bypassed port blocking restrictions when used in the Alt-Svc header.
Credit: security@mozilla.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Mozilla Thunderbird | <78.10 | 78.10 |
| <78.10 | 78.10 | |
| <78.10 | 78.10 | |
| <88 | 88 | |
| Mozilla Firefox | <88.0 | |
| Mozilla Firefox ESR | <78.10 | |
| Mozilla Thunderbird | <78.10 | |
| 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 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
- https://bugzilla.mozilla.org/show_bug.cgi?id=1698503
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-14/
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-15/
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-16/
- https://www.mozilla.org/security/advisories/mfsa2021-14/
- https://www.mozilla.org/security/advisories/mfsa2021-15/
- https://www.mozilla.org/security/advisories/mfsa2021-16/
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-14/#CVE-2021-29946
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-15/#CVE-2021-29946
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-16/#CVE-2021-29946
- https://security-tracker.debian.org/tracker/CVE-2021-29946
Peer vulnerabilities
(Found alongside the following vulnerabilities)
Frequently Asked Questions
What is the vulnerability ID for this issue?
The vulnerability ID for this issue is CVE-2021-29946.
What is the severity of CVE-2021-29946?
The severity of CVE-2021-29946 is low.
Which software products are affected by CVE-2021-29946?
Mozilla Thunderbird 78.10, Mozilla Firefox ESR 78.10, and Mozilla Firefox up to version 88 are affected by CVE-2021-29946.
What could happen due to CVE-2021-29946?
CVE-2021-29946 could result in the bypassing of port blocking restrictions when certain ports are used in the Alt-Svc header.
Where can I find more information about CVE-2021-29946?
More information about CVE-2021-29946 can be found at the following references: [1](https://bugzilla.mozilla.org/show_bug.cgi?id=1698503), [2](https://www.mozilla.org/en-US/security/advisories/mfsa2021-14/), [3](https://www.mozilla.org/en-US/security/advisories/mfsa2021-16/).
- collector/security-tracker-debian
- agent/type
- agent/first-publish-date
- agent/softwarecombine
- collector/mozilla-advisory
- source/Mozilla
- agent/software-canonical-lookup
- agent/references
- agent/severity
- agent/weakness
- agent/author
- agent/description
- agent/software-canonical-lookup-request
- collector/nvd-index
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- agent/tags
- agent/event
- agent/trending
- package-manager/debian
- vendor/mozilla
- canonical/mozilla thunderbird
- canonical/mozilla firefox esr
- canonical/mozilla firefox