CVE-2022-22747: mozilla firefox Improper Certificate Validation
CVSS: 6.5v3.1MediumModified
AliasesUBUNTU-CVE-2022-22747DEBIAN-CVE-2022-22747DLA-2898-1DSA-5062-1
Published 22-12-2022Last modified 16-04-2025
Vulnerability summary
CVE-2022-22747 is a medium (CVSS 6.5) Improper Certificate Validation vulnerability in mozilla firefox. EPSS estimates a 0.65% chance of exploitation in the next 30 days, higher than 50% of scored vulnerabilities.
CVSS score
6.5/10
010
Medium · v3.1 (CVE.org)EPSS score
0.65%
0%100%
Low · +0.02 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 30 · Related 14DLA-2880-1DLA-2881-1DSA-5044-1DSA-5045-1MGASA-2022-0013MGASA-2022-0019OPENSUSE-SU-2022:0136-1OPENSUSE-SU-2022:0199-1OPENSUSE-SU-2024:11732-1OPENSUSE-SU-2024:11733-1OPENSUSE-SU-2024:14572-1RHSA-2022:0123RHSA-2022:0124RHSA-2022:0125RHSA-2022:0126RHSA-2022:0127RHSA-2022:0128RHSA-2022:0129RHSA-2022:0130RHSA-2022:0131RHSA-2022:0132SUSE-SU-2022:0115-1SUSE-SU-2022:0136-1SUSE-SU-2022:0137-1SUSE-SU-2022:0199-1SUSE-SU-2022:14880-1USN-5229-1USN-5248-1USN-5506-1USN-5872-1
Timeline
- 22-12-2022PublishedVulnerability first disclosed.
- 16-04-2025Last modifiedVulnerability information updated.
Description
After accepting an untrusted certificate, handling an empty pkcs7 sequence as part of the certificate data could have lead to a crash. This crash is believed to be unexploitable. This vulnerability affects Firefox ESR < 91.5, Firefox < 96, and Thunderbird < 91.5.
CVSS metrics
4 scores · 4 sources · 1 versionMedium 6.5Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:HSourcesAll 4 agree
- OSV · UbuntuEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- NVDNIST6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.65%
Chance of exploitation in the next 30 days
Percentile
50%
Versus all other CVEs
30-day change
+0.02 pp
From 0.63% on 19-09-2026
19-09-202619-10-2026
EPSS score0.65%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Ubuntu7 products
- firefox< 96.0+build2-0ubuntu0.18.04.1 | < 96.0+build2-0ubuntu0.20.04.1 | < 96.0+build2-0ubuntu1
- mozjs38All versions (No fix recorded)
- mozjs52All versions (No fix recorded)
- mozjs68All versions (No fix recorded)
- mozjs78All versions (No fix recorded)
Debian3 products
- firefox-esr< 91.5.0esr-1
- nss< 2:3.42.1-1+deb10u5 | < 2:3.61-1+deb11u2 | < 2:3.26.2-1.1+deb9u5 | < 2:3.73-1
- thunderbird< 1:91.5.0-1
Mozilla3 products
- firefox≥ unspecified, < 96 | < 96.0
- firefox_esr≥ unspecified, < 91.5 | < 91.5
- thunderbird≥ unspecified, < 91.5 | < 91.5
3 vendors · 13 products
References
13 links- www.mozilla.org/security/advisories/mfsa2022-01/Vendor Advisory
- www.mozilla.org/security/advisories/mfsa2022-02/Vendor Advisory
- www.mozilla.org/security/advisories/mfsa2022-03/Vendor Advisory
