CVE-2018-5129
A lack of parameter validation on IPC messages results in a potential out-of-bounds write through malformed IPC messages.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (3.04%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.0
- 8.6 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N
- EPSS
- 3.04% probability · 87th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-787
- Affected
- debian/debian linux · mozilla/firefox · redhat/enterprise linux desktop · redhat/enterprise linux server · redhat/enterprise linux server aus · redhat/enterprise linux server eus · redhat/enterprise linux workstation · canonical/ubuntu linux · mozilla/thunderbird
- Source
- security@mozilla.org
EPSS 3.0% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://www.securityfocus.com/bid/103388Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1040514Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2018:0526Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:0527Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:0647Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:0648Third Party Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1428947Issue Tracking, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/03/msg00010.htmlThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/03/msg00029.htmlThird Party Advisory
- https://security.gentoo.org/glsa/201810-01Third Party Advisory
- https://security.gentoo.org/glsa/201811-13Third Party Advisory
- https://usn.ubuntu.com/3545-1/Third Party Advisory
- https://usn.ubuntu.com/3596-1/Third Party Advisory
- https://www.debian.org/security/2018/dsa-4139Third Party Advisory
- https://www.debian.org/security/2018/dsa-4155Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2018-06/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2018-07/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2018-09/Vendor Advisory
- http://www.securityfocus.com/bid/103388Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1040514Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2018:0526Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:0527Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:0647Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:0648Third Party Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1428947Issue Tracking, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/03/msg00010.htmlThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/03/msg00029.htmlThird Party Advisory
- https://security.gentoo.org/glsa/201810-01Third Party Advisory
- https://security.gentoo.org/glsa/201811-13Third Party Advisory
- https://usn.ubuntu.com/3545-1/Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.