Information disclosure in Mozilla Firefox
CVE-2018-5131
Under certain circumstances the "fetch()" API can return transient local copies of resources that were sent with a "no-store" or "no-cache" cache header instead of downloading a copy from the network as it should. This can result in previously stored, locally cached data of a website being accessible to users if they share a common profile while browsing. This vulnerability affects Firefox ESR < 52.7 and Firefox < 59.
Vulnerability class: Information Disclosure
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.023 (82.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 83rd percentile — 82.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.023 · newest: 0.023 · change: 0.000
Affected products
- Mozilla Firefox — versions unspecified
- Mozilla Firefox Esr — versions unspecified
- Canonical Ubuntu Linux — versions 14.04, 16.04, 17.10
- Debian Linux — versions 7.0, 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 7.4
- Red Hat Enterprise Linux Server Eus — versions 7.4, 7.5
- Red Hat Enterprise Linux Workstation — versions 6.0, 7.0
Weakness classification (CWE)
References
- www.debian.org/security/2018/dsa-4139 (vendor-advisory, Third Party Advisory)
- security.gentoo.org/glsa/201810-01 (vendor-advisory, Third Party Advisory)
- www.securityfocus.com/bid/103388 (VDB Entry, Third Party Advisory, vdb-entry)
- access.redhat.com/errata/RHSA-2018:0527 (vendor-advisory, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2018/03/msg00010.html (mailing-list, Third Party Advisory)
- www.mozilla.org/security/advisories/mfsa2018-07/ (Vendor Advisory)
- access.redhat.com/errata/RHSA-2018:0526 (vendor-advisory, Third Party Advisory)
- bugzilla.mozilla.org/show_bug.cgi (Permissions Required, Third Party Advisory, Issue Tracking)
- www.securitytracker.com/id/1040514 (VDB Entry, Third Party Advisory, vdb-entry)
- usn.ubuntu.com/3596-1/ (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2018-5131?
- CVE-2018-5131 is a medium-severity vulnerability in Mozilla Firefox, classified under Information Disclosure. CVSS score: 5.9/10. Published 2018-06-11.
- How severe is CVE-2018-5131?
- Medium severity. CVSS v3 base score is 5.9 out of 10.