Back
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…
Critical9.8EPSS 5.8%
- Published
- Updated
- Reserved
- Assigned by
- mozilla
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.
Timeline
ID reserved
By mozilla
- 5 months later
· 5 months later
Published
- 4 years later
· 4 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 5.8% · top 6.8% of all CVEs (7 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.
Weakness
- Buffer overflow in SCTP chunk input validation
- CWE-787 (opens in a new tab)All about CWE-787 and its CVEs
Affected products
- affected unspecified – < 68.8
- affected unspecified – < 76
- affected unspecified – < 68.8.0
References (10)
- https://www.mozilla.org/security/advisories/mfsa2020-18/ (opens in a new tab)x_refsource_MISCx_transferred
- https://www.mozilla.org/security/advisories/mfsa2020-16/ (opens in a new tab)x_refsource_MISCx_transferred
- https://www.mozilla.org/security/advisories/mfsa2020-17/ (opens in a new tab)x_refsource_MISCx_transferred
- https://bugzilla.mozilla.org/show_bug.cgi?id=1632241 (opens in a new tab)x_refsource_MISCx_transferred
- USN-4373-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- https://security.gentoo.org/glsa/202005-03 (opens in a new tab)x_refsource_MISCx_transferred
- https://security.gentoo.org/glsa/202005-04 (opens in a new tab)x_refsource_MISCx_transferred
- DSA-4714 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- openSUSE-SU-2020:0917 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- http://packetstormsecurity.com/files/158480/usrsctp-Stack-Buffer-Overflow.html (opens in a new tab)x_refsource_MISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2020-6831)Record last updated .