CVE-2020-12422: mozilla firefox Out-of-bounds Write
CVSS: 8.8v3.1HighModified
AliasesUBUNTU-CVE-2020-12422
Published 09-07-2020Last modified 04-08-2024
Vulnerability summary
CVE-2020-12422 is a high (CVSS 8.8) Out-of-bounds Write vulnerability in mozilla firefox. EPSS estimates a 1.94% chance of exploitation in the next 30 days, higher than 79.7% of scored vulnerabilities.
CVSS score
8.8/10
010
High · v3.1 (NVD)EPSS score
1.94%
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 13 · Related 8Timeline
- 09-07-2020PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
In non-standard configurations, a JPEG image created by JavaScript could have caused an internal variable to overflow, resulting in an out of bounds write, memory corruption, and a potentially exploitable crash. This vulnerability affects Firefox < 78.
CVSS metrics
3 scores · 2 sources · 2 versionsHigh 8.8Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HSourcesAll 2 agree
- OSV · UbuntuEcosystem advisory · calculated8.8HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
High 7.6Preferred score · NVD (NIST)
AV:N/AC:H/Au:N/C:C/I:C/A:CSourcesSingle source
EPSS trend
Probability
1.94%
Chance of exploitation in the next 30 days
Percentile
80%
Versus all other CVEs
30-day change
0.00 pp
From 1.94% on 18-09-2026
18-09-202618-10-2026
EPSS score1.94%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Ubuntu5 products
- firefox< 78.0.1+build1-0ubuntu0.16.04.1 | < 78.0.1+build1-0ubuntu0.18.04.1 | < 78.0.1+build1-0ubuntu0.20.04.1
- mozjs38All versions (No fix recorded)
- mozjs52All versions (No fix recorded)
- mozjs68All versions (No fix recorded)
- thunderbird< 1:78.8.1+build1-0ubuntu0.18.04.1 | < 1:78.7.1+build1-0ubuntu0.20.04.1
Mozilla1 product
- firefox≥ unspecified, < 78 | < 78.0
Opensuse1 product
- leapEOL15.1 | 15.2
3 vendors · 7 products
References
10 links- lists.opensuse.org/opensuse-security-announce/2020-07/msg00027.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2020-07/msg00049.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory