CVE-2018-18505

high-risk
Published 2019-02-05

An earlier fix for an Inter-process Communication (IPC) vulnerability, CVE-2011-3079, added authentication to communication between IPC endpoints and server parents during IPC process creation. This authentication is insufficient for channels created after the IPC process is started, leading to the authentication not being correctly applied to later channels. This could allow for a sandbox escape through IPC channels due to lack of message validation in the listener process. This vulnerability affects Thunderbird < 60.5, Firefox ESR < 60.5, and Firefox < 65.

Do I need to act?

~
3.1% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
10
CVSS 10.0/10 Critical
NETWORK / LOW complexity

Affected Products (17)

Affected Vendors

Debian Redhat Mozilla Canonical

References (36)

http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00021.html
Third Party Advisory http://www.securityfocus.com/bid/106781
Third Party Advisory https://access.redhat.com/errata/RHSA-2019:0218
Third Party Advisory https://access.redhat.com/errata/RHSA-2019:0219
Third Party Advisory https://access.redhat.com/errata/RHSA-2019:0269
Third Party Advisory https://access.redhat.com/errata/RHSA-2019:0270
Issue Tracking https://bugzilla.mozilla.org/show_bug.cgi?id=1087565
Mailing List https://lists.debian.org/debian-lts-announce/2019/01/msg00025.html
Mailing List https://lists.debian.org/debian-lts-announce/2019/02/msg00024.html
Third Party Advisory https://security.gentoo.org/glsa/201903-04
Third Party Advisory https://security.gentoo.org/glsa/201904-07
Third Party Advisory https://usn.ubuntu.com/3874-1/
Third Party Advisory https://usn.ubuntu.com/3897-1/
Third Party Advisory https://www.debian.org/security/2019/dsa-4376
Third Party Advisory https://www.debian.org/security/2019/dsa-4392
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2019-01/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2019-02/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2019-03/
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00021.html
Third Party Advisory http://www.securityfocus.com/bid/106781
and 16 more references
58
/ 100
high-risk
Severity 33/34 · Critical
Exploitability 6/34 · Minimal
Exposure 19/34 · Moderate