CVE-2023-6204
First published: Tue Nov 21 2023(Updated: )
On some systems—depending on the graphics settings and drivers—it was possible to force an out-of-bounds read and leak memory data into the images created on the canvas element. This vulnerability affects Firefox < 120, Firefox ESR < 115.5.0, and Thunderbird < 115.5.
Credit: security@mozilla.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/firefox | <115.5 | 115.5 |
| redhat/thunderbird | <115.5 | 115.5 |
| ubuntu/firefox | <120.0+ | 120.0+ |
| ubuntu/thunderbird | <1:115.5.0+ | 1:115.5.0+ |
| ubuntu/thunderbird | <1:115.5.0+ | 1:115.5.0+ |
| ubuntu/thunderbird | <1:115.5.0+ | 1:115.5.0+ |
| ubuntu/thunderbird | <1:115.5.0+ | 1:115.5.0+ |
| debian/firefox | 123.0-1 | |
| debian/firefox-esr | <=91.12.0esr-1~deb10u1 | 115.8.0esr-1~deb10u1 115.7.0esr-1~deb11u1 115.8.0esr-1~deb11u1 115.7.0esr-1~deb12u1 115.8.0esr-1~deb12u1 115.8.0esr-1 |
| debian/thunderbird | <=1:91.12.0-1~deb10u1 | 1:115.8.0-1~deb10u1 1:115.7.0-1~deb11u1 1:115.8.0-1~deb11u1 1:115.7.0-1~deb12u1 1:115.8.0-1~deb12u1 1:115.7.0-1 1:115.8.1-1 |
| Thunderbird | <115.5 | 115.5 |
| Firefox ESR | <115.5 | 115.5 |
| Firefox | <120 | 120 |
| Firefox | <120.0 | |
| Firefox ESR | <115.5.0 | |
| Thunderbird | <115.5 | |
| Debian Linux | =10.0 | |
| Debian Linux | =11.0 | |
| Debian Linux | =12.0 |
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Reference Links
- https://bugzilla.mozilla.org/show_bug.cgi?id=1841050
- https://www.mozilla.org/security/advisories/mfsa2023-49/
- https://www.mozilla.org/security/advisories/mfsa2023-50/
- https://www.mozilla.org/security/advisories/mfsa2023-52/
- https://www.debian.org/security/2023/dsa-5561
- https://lists.debian.org/debian-lts-announce/2023/11/msg00017.html
- https://lists.debian.org/debian-lts-announce/2023/11/msg00030.html
- https://launchpad.net/bugs/cve/CVE-2023-6204
- https://www.mozilla.org/en-US/security/advisories/mfsa2023-49/
- https://www.mozilla.org/en-US/security/advisories/mfsa2023-50/
- https://www.mozilla.org/en-US/security/advisories/mfsa2023-52/
- https://www.mozilla.org/en-US/security/advisories/mfsa2023-50/#CVE-2023-6204
- https://access.redhat.com/errata/RHSA-2023:7499
- https://access.redhat.com/errata/RHSA-2023:7502
- https://access.redhat.com/errata/RHSA-2023:7500
- https://access.redhat.com/errata/RHSA-2023:7501
- https://access.redhat.com/errata/RHSA-2023:7504
- https://access.redhat.com/errata/RHSA-2023:7503
- https://access.redhat.com/errata/RHSA-2023:7506
- https://access.redhat.com/errata/RHSA-2023:7510
- https://access.redhat.com/errata/RHSA-2023:7507
- https://access.redhat.com/errata/RHSA-2023:7511
- https://access.redhat.com/errata/RHSA-2023:7508
- https://access.redhat.com/errata/RHSA-2023:7505
- https://access.redhat.com/errata/RHSA-2023:7509
- https://access.redhat.com/errata/RHSA-2023:7512
- https://access.redhat.com/errata/RHSA-2023:7547
- https://access.redhat.com/errata/RHSA-2023:7569
- https://access.redhat.com/errata/RHSA-2023:7570
- https://access.redhat.com/errata/RHSA-2023:7573
- https://access.redhat.com/errata/RHSA-2023:7574
- https://access.redhat.com/errata/RHSA-2023:7577
- https://bugzilla.redhat.com/show_bug.cgi?id=2250896
- https://www.mozilla.org/en-US/security/advisories/mfsa2023-49/#CVE-2023-6204
- https://www.mozilla.org/en-US/security/advisories/mfsa2023-52/#CVE-2023-6204
- https://security-tracker.debian.org/tracker/CVE-2023-6204
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-6204
- https://ubuntu.com/security/notices/USN-6509-1
- https://ubuntu.com/security/notices/USN-6515-1
- https://nvd.nist.gov/vuln/detail/CVE-2023-6204
- https://ubuntu.com/security/CVE-2023-6204
Parent vulnerabilities
(Appears in the following advisories)
Peer vulnerabilities
(Found alongside the following vulnerabilities)
Frequently Asked Questions
What is the severity of CVE-2023-6204?
The severity of CVE-2023-6204 is high.
Which systems are affected by CVE-2023-6204?
CVE-2023-6204 affects systems with Firefox versions < 120, Firefox versions < 115.5, and Thunderbird versions < 115.5.0.
How can CVE-2023-6204 be exploited?
CVE-2023-6204 can be exploited by forcing an out-of-bounds read and leaking memory data into canvas element images.
What is the remedy for CVE-2023-6204?
The remedy for CVE-2023-6204 is to update Firefox to version 120 or higher, Firefox to version 115.5 or higher, or Thunderbird to version 115.5.0 or higher.
Where can I find more information about CVE-2023-6204?
You can find more information about CVE-2023-6204 in the Mozilla bugzilla and security advisories: [Mozilla Bugzilla](https://bugzilla.mozilla.org/show_bug.cgi?id=1841050), [Mozilla Security Advisory 2023-49](https://www.mozilla.org/security/advisories/mfsa2023-49/), [Mozilla Security Advisory 2023-50](https://www.mozilla.org/security/advisories/mfsa2023-50/).
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