Vulnerability · Published May 26, 2020 · Assigned by mozilla
CVE-2020-6831
Critical 9.8
In plain English
A critical-severity security flaw in Firefox from Mozilla. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 5.8% (higher than 93% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)9.8Critical
Exploit odds (30 days)5.8%top 6.8% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | firefox | 76.0-r0 | ALPINE-CVE-2020-6831 |
| Alpine:v3.21 | firefox | 76.0-r0 | ALPINE-CVE-2020-6831 |
| Alpine:v3.22 | firefox | 76.0-r0 | ALPINE-CVE-2020-6831 |
| Alpine:v3.23 | firefox | 76.0-r0 | ALPINE-CVE-2020-6831 |
| Alpine:v3.20 | firefox-esr | 68.8.0-r0 | ALPINE-CVE-2020-6831 |
| Alpine:v3.21 | firefox-esr | 68.8.0-r0 | ALPINE-CVE-2020-6831 |
| Alpine:v3.22 | firefox-esr | 68.8.0-r0 | ALPINE-CVE-2020-6831 |
| Alpine:v3.23 | firefox-esr | 68.8.0-r0 | ALPINE-CVE-2020-6831 |
| Alpine:v3.21 | librewolf | 76.0-r0 | ALPINE-CVE-2020-6831 |
| Alpine:v3.22 | librewolf | 76.0-r0 | ALPINE-CVE-2020-6831 |
| Alpine:v3.23 | librewolf | 76.0-r0 | ALPINE-CVE-2020-6831 |
| Alpine:v3.24 | librewolf | 76.0-r0 | ALPINE-CVE-2020-6831 |
| Alpine:v3.20 | thunderbird | 68.8.0-r0 | ALPINE-CVE-2020-6831 |
| Alpine:v3.21 | thunderbird | 68.8.0-r0 | ALPINE-CVE-2020-6831 |
| Alpine:v3.22 | thunderbird | 68.8.0-r0 | ALPINE-CVE-2020-6831 |
| Alpine:v3.23 | thunderbird | 68.8.0-r0 | ALPINE-CVE-2020-6831 |
| Debian:12 | chromium | 83.0.4103.83-1 | DEBIAN-CVE-2020-6831 |
| Debian:13 | chromium | 83.0.4103.83-1 | DEBIAN-CVE-2020-6831 |
| Debian:14 | chromium | 83.0.4103.83-1 | DEBIAN-CVE-2020-6831 |
| Debian:12 | firefox-esr | 68.8.0esr-1 | DEBIAN-CVE-2020-6831 |
| Debian:13 | firefox-esr | 68.8.0esr-1 | DEBIAN-CVE-2020-6831 |
| Debian:14 | firefox-esr | 68.8.0esr-1 | DEBIAN-CVE-2020-6831 |
| Debian:12 | thunderbird | 1:68.8.0-1 | DEBIAN-CVE-2020-6831 |
| Debian:13 | thunderbird | 1:68.8.0-1 | DEBIAN-CVE-2020-6831 |
| Debian:14 | thunderbird | 1:68.8.0-1 | DEBIAN-CVE-2020-6831 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox ESR | unspecified – before 68.8 |
| Mozilla | Firefox | unspecified – before 76 |
| Mozilla | Thunderbird | unspecified – before 68.8.0 |
References
- https://www.mozilla.org/security/advisories/mfsa2020-18/ x_refsource_MISC
- https://www.mozilla.org/security/advisories/mfsa2020-16/ x_refsource_MISC
- https://www.mozilla.org/security/advisories/mfsa2020-17/ x_refsource_MISC
- https://bugzilla.mozilla.org/show_bug.cgi?id=1632241 x_refsource_MISC
- USN-4373-1 vendor-advisory, x_refsource_UBUNTU
- https://security.gentoo.org/glsa/202005-03 x_refsource_MISC
- https://security.gentoo.org/glsa/202005-04 x_refsource_MISC
- DSA-4714 vendor-advisory, x_refsource_DEBIAN
- openSUSE-SU-2020:0917 vendor-advisory, x_refsource_SUSE
- http://packetstormsecurity.com/files/158480/usrsctp-Stack-Buffer-Overflow.html x_refsource_MISC