Vulnerability in Mozilla Firefox
CVE-2018-12383
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.005 (37.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 37.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Mozilla Firefox — versions unspecified
- Mozilla Firefox Esr — versions unspecified
- Mozilla Firefox Esr
- Mozilla Thunderbird — versions unspecified
- Canonical Ubuntu Linux — versions 14.04, 16.04, 18.04
- Debian Linux — versions 8.0, 9.0
- Red Hat Enterprise Linux Desktop — versions 6.0, 7.0
- Red Hat Enterprise Linux Server — versions 6.0, 7.0
- Red Hat Enterprise Linux Server Aus — versions 7.6
- Red Hat Enterprise Linux Server Eus — versions 7.5, 7.6
Weakness classification (CWE)
References
- security.gentoo.org/glsa/201810-01 (vendor-advisory, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2018/11/msg00011.html (mailing-list, Mailing List, Third Party Advisory)
- security.gentoo.org/glsa/201811-13 (vendor-advisory, Third Party Advisory)
- bugzilla.mozilla.org/show_bug.cgi (Exploit, Issue Tracking, Vendor Advisory)
- www.debian.org/security/2018/dsa-4327 (vendor-advisory, Third Party Advisory)
- www.mozilla.org/security/advisories/mfsa2018-23/ (Vendor Advisory)
- access.redhat.com/errata/RHSA-2018:2835 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2018:3403 (vendor-advisory, Third Party Advisory)
- www.mozilla.org/security/advisories/mfsa2018-20/ (Vendor Advisory)
- www.securitytracker.com/id/1041610 (VDB Entry, Third Party Advisory, vdb-entry)
Frequently asked questions
- What is CVE-2018-12383?
- CVE-2018-12383 is a medium-severity vulnerability in Mozilla Firefox, classified under Insufficiently Protected Credentials. CVSS score: 5.5/10. Published 2018-10-18.
- How severe is CVE-2018-12383?
- Medium severity. CVSS v3 base score is 5.5 out of 10.