CVE-2018-12383: canonical ubuntu_linux Insufficiently Protected Credentials
Vulnerability summary
CVE-2018-12383 is a medium (CVSS 5.5) Insufficiently Protected Credentials vulnerability in canonical ubuntu_linux. EPSS estimates a 0.46% chance of exploitation in the next 30 days, higher than 39.9% of scored vulnerabilities. 1 public exploit is recorded.
Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 18 · Related 10Timeline
- 18-10-2018PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
If a user saved passwords before Firefox 58 and then later set a master password, an unencrypted copy of these passwords is still accessible. This is because the older stored password file was not deleted when the data was copied to a new format starting in Firefox 58. The new master password is added only on the new file. This could allow the exposure of stored password data outside of user expectations. This vulnerability affects Firefox < 62, Firefox ESR < 60.2.1, and Thunderbird < 60.2.1.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated5.5MediumCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- OSV · DebianEcosystem advisory · calculated5.5MediumCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
EPSS trend
Probability
0.46%
Chance of exploitation in the next 30 days
Percentile
40%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.46% 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
1 foundExploit Reference (bugzilla.mozilla.org)
Maturity: unknown
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< 60.2.1esr-1
- thunderbird< 1:60.2.1-1
- debian_linuxEOL8.0 | 9.0
Mozilla3 products
- firefox≥ unspecified, < 62 | < 62.0
- firefox esr≥ unspecified, < 60.2.1 | < 60.2.1
- thunderbird≥ unspecified, < 60.2.1 | < 60.2.1
Ubuntu2 products
- firefox< 62.0+build2-0ubuntu0.14.04.3 | < 62.0+build2-0ubuntu0.16.04.3 | < 62.0+build2-0ubuntu0.18.04.3
- thunderbird< 1:60.2.1+build1-0ubuntu0.14.04.2 | < 1:60.2.1+build1-0ubuntu0.16.04.4 | < 1:60.2.1+build1-0ubuntu0.18.04.2
Canonical1 product
- ubuntu_linuxEOL14.04 | 16.04 | 18.04
5 vendors · 15 products
References
25 links
lists.debian.org/debian-lts-announce/2018/11/msg00011.htmlMailing ListX Refsource MLISTThird Party Advisory