CVE-2020-6831
CRITICALCVSS 9.8/10EPSS 5.80%
Last modified
CVE-2020-6831 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. A buffer overflow could occur when parsing and validating SCTP chunks in WebRTC. This could have led to memory corruption and a potentially exploitable crash. EPSS estimates a 5.80% chance of exploitation in the next 30 days.
Description
A buffer overflow could occur when parsing and validating SCTP chunks in WebRTC. This could have led to memory corruption and a potentially exploitable crash. This vulnerability affects Firefox ESR < 68.8, Firefox < 76, and Thunderbird < 68.8.0.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | < 76.0 |
| Mozilla | Firefox Esr | < 68.8.0 |
| Mozilla | Thunderbird | < 68.8.0 |
| Canonical | Ubuntu Linux | 16.04 |
| Canonical | Ubuntu Linux | 18.04 |
| Canonical | Ubuntu Linux | 19.10 |
| Canonical | Ubuntu Linux | 20.04 |
| Debian | Debian Linux | 9.0 |
| Debian | Debian Linux | 10.0 |
| Opensuse | Leap | 15.2 |
References
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00000.htmlMailing List, Third Party Advisory
- http://packetstormsecurity.com/files/158480/usrsctp-Stack-Buffer-Overflow.htmlThird Party Advisory, VDB Entry
- https://bugzilla.mozilla.org/show_bug.cgi?id=1632241Permissions Required
- https://security.gentoo.org/glsa/202005-03Patch, Third Party Advisory
- https://security.gentoo.org/glsa/202005-04Third Party Advisory
- https://usn.ubuntu.com/4373-1/Third Party Advisory
- https://www.debian.org/security/2020/dsa-4714Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2020-16/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2020-17/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2020-18/Vendor Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00000.htmlMailing List, Third Party Advisory
- http://packetstormsecurity.com/files/158480/usrsctp-Stack-Buffer-Overflow.htmlThird Party Advisory, VDB Entry
- https://bugzilla.mozilla.org/show_bug.cgi?id=1632241Permissions Required
- https://security.gentoo.org/glsa/202005-03Patch, Third Party Advisory
- https://security.gentoo.org/glsa/202005-04Third Party Advisory
- https://usn.ubuntu.com/4373-1/Third Party Advisory
- https://www.debian.org/security/2020/dsa-4714Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2020-16/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2020-17/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2020-18/Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2020-6831?
A buffer overflow could occur when parsing and validating SCTP chunks in WebRTC. This could have led to memory corruption and a potentially exploitable crash. This vulnerability affects Firefox ESR < 68.8, Firefox < 76, and Thunderbird < 68.8.0.
How severe is CVE-2020-6831?
CVE-2020-6831 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 5.80% probability of exploitation in the next 30 days.
How do I fix CVE-2020-6831?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
Are you affected by CVE-2020-6831?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST