VulnerabilityModified
CVE-2018-14600
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.
CRITICAL 9.8EPSS 9.34%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (9.34%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.0
- 9.8 CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 9.34% probability · 95th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-787
- Affected
- x.org/libx11 · canonical/ubuntu linux · debian/debian linux
- Source
- cve@mitre.org
References
- http://www.openwall.com/lists/oss-security/2018/08/21/6Mailing List, Third Party Advisory
- http://www.securityfocus.com/bid/105177Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1041543Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2019:2079
- https://bugzilla.suse.com/show_bug.cgi?id=1102068Issue Tracking, Patch, Third Party Advisory
- https://cgit.freedesktop.org/xorg/lib/libX11/commit/?id=dbf72805fd9d7b1846fe9a11b46f3994bfc27feaPatch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/08/msg00030.htmlMailing List, Third Party Advisory
- https://lists.x.org/archives/xorg-announce/2018-August/002916.htmlThird Party Advisory
- https://security.gentoo.org/glsa/201811-01Third Party Advisory
- https://usn.ubuntu.com/3758-1/Third Party Advisory
- https://usn.ubuntu.com/3758-2/Third Party Advisory
- http://www.openwall.com/lists/oss-security/2018/08/21/6Mailing List, Third Party Advisory
- http://www.securityfocus.com/bid/105177Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1041543Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2019:2079
- https://bugzilla.suse.com/show_bug.cgi?id=1102068Issue Tracking, Patch, Third Party Advisory
- https://cgit.freedesktop.org/xorg/lib/libX11/commit/?id=dbf72805fd9d7b1846fe9a11b46f3994bfc27feaPatch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/08/msg00030.htmlMailing List, Third Party Advisory
- https://lists.x.org/archives/xorg-announce/2018-August/002916.htmlThird Party Advisory
- https://security.gentoo.org/glsa/201811-01Third Party Advisory
- https://usn.ubuntu.com/3758-1/Third Party Advisory
- https://usn.ubuntu.com/3758-2/Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.