CVE-2020-6831

high-risk

Published 2020-05-26

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.

Do I need to act?

6.3% chance of exploitation in next 30 days

EPSS score — moderate exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 9.8/10 Critical

NETWORK / LOW complexity

Affected Products (10)

Firefox

Firefox Esr

Thunderbird

Ubuntu Linux

Debian Linux

Leap

Affected Vendors

Debian Mozilla Canonical Opensuse

References (20)

Mailing List http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00000.html

Third Party Advisory http://packetstormsecurity.com/files/158480/usrsctp-Stack-Buffer-Overflow.html

Permissions Required https://bugzilla.mozilla.org/show_bug.cgi?id=1632241

Patch https://security.gentoo.org/glsa/202005-03

Third Party Advisory https://security.gentoo.org/glsa/202005-04

Third Party Advisory https://usn.ubuntu.com/4373-1/

Third Party Advisory https://www.debian.org/security/2020/dsa-4714

Vendor 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/