Buffer overflow in X.org Libx11
CVE-2018-14600
An issue was discovered in libX11 through 1.6.5. The function XListExtensions in ListExt.c interprets a variable as signed instead of unsigned, resulting in an out-of-bounds write (of up to 128 bytes), leading to DoS or remote code execution.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.092 (95.3th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 95th percentile — 95.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.093 · newest: 0.092 · change: -0.001
Affected products
- X.org Libx11
- Canonical Ubuntu Linux — versions 12.04, 14.04, 16.04
- Debian Linux — versions 8.0
Weakness classification (CWE)
References
- usn.ubuntu.com/3758-2/ (vendor-advisory, Third Party Advisory)
- security.gentoo.org/glsa/201811-01 (vendor-advisory, Third Party Advisory)
- www.securityfocus.com/bid/105177 (VDB Entry, Third Party Advisory, vdb-entry)
- bugzilla.suse.com/show_bug.cgi (Patch, Third Party Advisory, Issue Tracking)
- www.openwall.com/lists/oss-security/2018/08/21/6 (mailing-list, Mailing List, Third Party Advisory)
- www.securitytracker.com/id/1041543 (VDB Entry, Third Party Advisory, vdb-entry)
- cgit.freedesktop.org/xorg/lib/libX11/commit/ (Patch, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2018/08/msg00030.html (mailing-list, Mailing List, Third Party Advisory)
- lists.x.org/archives/xorg-announce/2018-August/002916.html (mailing-list, Third Party Advisory)
- usn.ubuntu.com/3758-1/ (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2018-14600?
- CVE-2018-14600 is a critical-severity vulnerability in X.org Libx11, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2018-08-24.
- How severe is CVE-2018-14600?
- Critical severity. CVSS v3 base score is 9.8 out of 10.