Vulnerability Description
The WebGL `DrawElementsInstanced` method was susceptible to a heap buffer overflow when used on systems with the Mesa VM driver. This issue could allow an attacker to perform remote code execution and sandbox escape. This vulnerability affects Firefox ESR < 115.6, Thunderbird < 115.6, and Firefox < 121.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | < 121.0 |
| Mozilla | Firefox Esr | < 115.6 |
| Mozilla | Thunderbird | < 115.6 |
| Debian | Debian Linux | 10.0 |
Related Weaknesses (CWE)
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1843782Issue TrackingPermissions Required
- https://lists.debian.org/debian-lts-announce/2023/12/msg00020.htmlMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2023/12/msg00021.htmlMailing ListThird Party Advisory
- https://security.gentoo.org/glsa/202401-10Third Party Advisory
- https://www.debian.org/security/2023/dsa-5581Third Party Advisory
- https://www.debian.org/security/2023/dsa-5582Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2023-54/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2023-55/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2023-56/Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1843782Issue TrackingPermissions Required
- https://lists.debian.org/debian-lts-announce/2023/12/msg00020.htmlMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2023/12/msg00021.htmlMailing ListThird Party Advisory
- https://security.gentoo.org/glsa/202401-10Third Party Advisory
- https://www.debian.org/security/2023/dsa-5581Third Party Advisory
- https://www.debian.org/security/2023/dsa-5582Third Party Advisory
FAQ
What is CVE-2023-6856?
CVE-2023-6856 is a vulnerability with a CVSS score of 8.8 (HIGH). The WebGL `DrawElementsInstanced` method was susceptible to a heap buffer overflow when used on systems with the Mesa VM driver. This issue could allow an attacker to perform remote code execution an...
How severe is CVE-2023-6856?
CVE-2023-6856 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2023-6856?
Check the references section above for vendor advisories and patch information. Affected products include: Mozilla Firefox, Mozilla Firefox Esr, Mozilla Thunderbird, Debian Debian Linux.