CVE-2020-6831: canonical ubuntu_linux Out-of-bounds Write
CVSS: 9.8v3.1CriticalModified
AliasesUBUNTU-CVE-2020-6831DEBIAN-CVE-2020-6831
Published 26-05-2020Last modified 04-08-2024
Vulnerability summary
CVE-2020-6831 is a critical (CVSS 9.8) Out-of-bounds Write vulnerability in canonical ubuntu_linux. EPSS estimates a 5.80% chance of exploitation in the next 30 days, higher than 93% of scored vulnerabilities.
CVSS score
9.8/10
010
Critical · v3.1 (NVD)EPSS score
5.80%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 36 · Related 17DLA-2205-1DLA-2206-1DSA-4678-1DSA-4683-1DSA-4714-1MGASA-2020-0208MGASA-2020-0209MGASA-2020-0210OPENSUSE-SU-2020:0620-1OPENSUSE-SU-2020:0621-1OPENSUSE-SU-2020:0643-1OPENSUSE-SU-2020:0648-1OPENSUSE-SU-2020:0709-1OPENSUSE-SU-2020:0917-1OPENSUSE-SU-2024:10600-1OPENSUSE-SU-2024:10601-1OPENSUSE-SU-2024:10681-1OPENSUSE-SU-2024:12948-1OPENSUSE-SU-2024:14572-1RHSA-2020:2031RHSA-2020:2032RHSA-2020:2033RHSA-2020:2036RHSA-2020:2037RHSA-2020:2046RHSA-2020:2047RHSA-2020:2048RHSA-2020:2049RHSA-2020:2050RHSA-2020:2064SUSE-SU-2020:1209-1SUSE-SU-2020:1218-1SUSE-SU-2020:1225-1SUSE-SU-2020:14359-1USN-4353-1USN-4373-1
Timeline
- 26-05-2020PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
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.
CVSS metrics
4 scores · 3 sources · 2 versionsCritical 9.8Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HSourcesAll 3 agree
- OSV · UbuntuEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
High 7.5Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:P/I:P/A:PSourcesSingle source
EPSS trend
Probability
5.80%
Chance of exploitation in the next 30 days
Percentile
93%
Versus all other CVEs
30-day change
0.00 pp
From 5.80% on 19-09-2026
19-09-202619-10-2026
EPSS score5.80%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Ubuntu6 products
- chromium-browser< 81.0.4044.138-0ubuntu0.16.04.1 | < 81.0.4044.138-0ubuntu0.18.04.1
- firefox< 76.0+build2-0ubuntu0.16.04.1 | < 76.0+build2-0ubuntu0.18.04.1 | < 76.0+build2-0ubuntu0.20.04.1
- mozjs38All versions (No fix recorded)
- mozjs52All versions (No fix recorded)
- mozjs68All versions (No fix recorded)
Debian4 products
- chromium< 83.0.4103.83-1
- firefox-esr< 68.8.0esr-1
- thunderbird< 1:68.8.0-1
- debian_linuxEOL9.0 | 10.0
Mozilla3 products
- firefox≥ unspecified, < 76 | < 76.0
- firefox_esr≥ unspecified, < 68.8 | < 68.8.0
- thunderbird≥ unspecified, < 68.8.0 | < 68.8.0
Canonical1 product
- ubuntu_linuxEOL16.04 | 18.04 | 19.10 | 20.04
Opensuse1 product
- leapEOL15.2
5 vendors · 15 products
References
18 links
- lists.opensuse.org/opensuse-security-announce/2020-07/msg00000.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
- packetstormsecurity.com/files/158480/usrsctp-Stack-Buffer-Overflow.htmlX Refsource MISCThird Party AdvisoryVDB Entry