CVE-2021-23973: debian debian_linux
CVSS: 6.5v3.1MediumModified
AliasesUBUNTU-CVE-2021-23973DEBIAN-CVE-2021-23973
Published 26-02-2021Last modified 03-08-2024
Vulnerability summary
CVE-2021-23973 is a medium (CVSS 6.5) vulnerability in debian debian_linux. EPSS estimates a 1.37% chance of exploitation in the next 30 days, higher than 71.4% of scored vulnerabilities.
CVSS score
6.5/10
010
Medium · v3.1 (NVD)EPSS score
1.37%
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 26 · Related 12DLA-2575-1DLA-2578-1DSA-4862-1DSA-4866-1MGASA-2021-0096MGASA-2021-0097OPENSUSE-SU-2021:0373-1OPENSUSE-SU-2021:0387-1OPENSUSE-SU-2024:10600-1OPENSUSE-SU-2024:10601-1OPENSUSE-SU-2024:14572-1RHSA-2021:0655RHSA-2021:0656RHSA-2021:0657RHSA-2021:0658RHSA-2021:0659RHSA-2021:0660RHSA-2021:0661RHSA-2021:0662SUSE-SU-2021:0659-1SUSE-SU-2021:0661-1SUSE-SU-2021:0667-1SUSE-SU-2021:0676-1SUSE-SU-2021:14657-1USN-4756-1USN-4936-1
Timeline
- 26-02-2021PublishedVulnerability first disclosed.
- 03-08-2024Last modifiedVulnerability information updated.
Description
When trying to load a cross-origin resource in an audio/video context a decoding error may have resulted, and the content of that error may have revealed information about the resource. This vulnerability affects Firefox < 86, Thunderbird < 78.8, and Firefox ESR < 78.8.
CVSS metrics
4 scores · 3 sources · 2 versionsMedium 6.5Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:NSourcesAll 3 agree
- OSV · UbuntuEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
- OSV · DebianEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Medium 4.3Preferred score · NVD (NIST)
AV:N/AC:M/Au:N/C:P/I:N/A:NSourcesSingle source
EPSS trend
Probability
1.37%
Chance of exploitation in the next 30 days
Percentile
71%
Versus all other CVEs
30-day change
0.00 pp
From 1.37% on 19-09-2026
19-09-202619-10-2026
EPSS score1.37%
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
- firefox< 86.0+build3-0ubuntu0.16.04.1 | < 86.0+build3-0ubuntu0.18.04.1 | < 86.0+build3-0ubuntu0.20.04.1
- mozjs38All versions (No fix recorded)
- mozjs52All versions (No fix recorded)
- mozjs68All versions (No fix recorded)
- mozjs78All versions (No fix recorded)
Debian3 products
- firefox-esr< 78.8.0esr-1
- thunderbird< 1:78.8.0-1
- debian_linuxEOL9.0 | 10.0
Mozilla3 products
- firefox< 86 | < 86.0
- firefox_esr< 78.8
- thunderbird< 78.8
3 vendors · 12 products
References
16 links- bugzilla.mozilla.org/show_bug.cgi?id=1690976X Refsource MISCREPORTIssue TrackingPermissions RequiredVendor Advisory
lists.debian.org/debian-lts-announce/2021/03/msg00000.htmlMailing ListX Refsource MLISTThird Party Advisory