CVE-2018-12379: debian debian_linux Out-of-bounds Write
Vulnerability summary
CVE-2018-12379 is a high (CVSS 7.8) Out-of-bounds Write vulnerability in debian debian_linux. EPSS estimates a 0.39% chance of exploitation in the next 30 days, higher than 33.5% of scored vulnerabilities.
Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 12 · Related 5Timeline
- 18-10-2018PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
When the Mozilla Updater opens a MAR format file which contains a very long item filename, an out-of-bounds write can be triggered, leading to a potentially exploitable crash. This requires running the Mozilla Updater manually on the local system with the malicious MAR file in order to occur. This vulnerability affects Firefox < 62, Firefox ESR < 60.2, and Thunderbird < 60.2.1.
CVSS metrics
3 scores · 2 sources · 2 versions- OSV · DebianEcosystem advisory · calculated7.8HighCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
0.39%
Chance of exploitation in the next 30 days
Percentile
34%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.39% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Redhat6 products
- enterprise_linux_desktop6.0 | 7.0
- enterprise_linux_server6.0 | 7.0
- enterprise_linux_server_aus7.6
- enterprise_linux_server_eus7.5 | 7.6
- enterprise_linux_server_tus7.6
Debian3 products
- firefox-esr< 60.2.0esr-1
- thunderbird< 1:60.2.1-1
- debian_linuxEOL8.0 | 9.0
Mozilla3 products
- firefox≥ unspecified, < 62 | < 60.2.0 | < 62.0
- firefox esr≥ unspecified, < 60.2
- thunderbird≥ unspecified, < 60.2.1 | < 60.2.1
3 vendors · 12 products
References
15 links
lists.debian.org/debian-lts-announce/2018/11/msg00011.htmlMailing ListX Refsource MLISTThird Party Advisory
Show all 15 references
- bugzilla.mozilla.org/show_bug.cgi?id=1473113X Refsource CONFIRMIssue TrackingPermissions RequiredVendor Advisory