Buffer overflow in Mozilla Firefox
CVE-2018-5129
A lack of parameter validation on IPC messages results in a potential out-of-bounds write through malformed IPC messages. This can potentially allow for sandbox escape through memory corruption in the parent process. This vulnerability affects Thunderbird < 52.7, Firefox ESR < 52.7, and Firefox < 59.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.6 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.030 (86.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 87th percentile — 86.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.030 · newest: 0.030 · change: 0.000
Affected products
- Mozilla Firefox — versions unspecified
- Mozilla Firefox Esr — versions unspecified
- Mozilla Thunderbird — 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)
Public proof-of-concept exploits
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)
- security.gentoo.org/glsa/201811-13 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2018:0527 (vendor-advisory, Third Party Advisory)
- usn.ubuntu.com/3545-1/ (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/mfsa2018-09/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2018-07/ (Vendor Advisory)
- access.redhat.com/errata/RHSA-2018:0526 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2018-5129?
- CVE-2018-5129 is a high-severity vulnerability in Mozilla Firefox, classified under Out-of-bounds Write. CVSS score: 8.6/10. Published 2018-06-11.
- How severe is CVE-2018-5129?
- High severity. CVSS v3 base score is 8.6 out of 10.
- Is CVE-2018-5129 known to be exploited?
- 6 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.