Buffer overflow in Mozilla Firefox
CVE-2018-5178
A buffer overflow was found during UTF8 to Unicode string conversion within JavaScript with extremely large amounts of data. This vulnerability requires the use of a malicious or vulnerable legacy extension in order to occur. This vulnerability affects Thunderbird ESR < 52.8, Thunderbird < 52.8, and Firefox ESR < 52.8.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.050 (91.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 92nd percentile — 91.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.050 · newest: 0.050 · change: 0.000
Affected products
- Mozilla Firefox
- Mozilla Firefox Esr — versions unspecified
- Mozilla Thunderbird — versions unspecified
- Mozilla Thunderbird Esr — versions unspecified
- Mozilla Thunderbird Esr
- 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 7.6
Weakness classification (CWE)
Public proof-of-concept exploits
References
- access.redhat.com/errata/RHSA-2018:1415 (vendor-advisory, Third Party Advisory)
- security.gentoo.org/glsa/201810-01 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2018:1726 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2018:1414 (vendor-advisory, Third Party Advisory)
- security.gentoo.org/glsa/201811-13 (vendor-advisory, Third Party Advisory)
- www.mozilla.org/security/advisories/mfsa2018-13/ (Vendor Advisory)
- usn.ubuntu.com/3660-1/ (vendor-advisory, Third Party Advisory)
- www.securitytracker.com/id/1040898 (VDB Entry, Third Party Advisory, vdb-entry)
- www.debian.org/security/2018/dsa-4199 (vendor-advisory, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2018/05/msg00013.html (mailing-list, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2018-5178?
- CVE-2018-5178 is a high-severity vulnerability in Mozilla Firefox, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.1/10. Published 2018-06-11.
- How severe is CVE-2018-5178?
- High severity. CVSS v3 base score is 8.1 out of 10.
- Is CVE-2018-5178 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.