CVE-2018-15857 — HIGH (7.8)

Q: How severe is CVE-2018-15857?

CVE-2018-15857 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.

Q: Is there a patch for CVE-2018-15857?

Check the references section above for vendor advisories and patch information. Affected products include: Xkbcommon Libxkbcommon, Xkbcommon Xkbcommon, Canonical Ubuntu Linux.

Vulnerability Description

An invalid free in ExprAppendMultiKeysymList in xkbcomp/ast-build.c in xkbcommon before 0.8.1 could be used by local attackers to crash xkbcommon keymap parsers or possibly have unspecified other impact by supplying a crafted keymap file.

CVSS Score

7.8

HIGH

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Xkbcommon	Libxkbcommon	< 0.8.1
Xkbcommon	Xkbcommon	< 0.8.1
Canonical	Ubuntu Linux	14.04

Related Weaknesses (CWE)

CWE-416

References

https://access.redhat.com/errata/RHSA-2019:2079
https://github.com/xkbcommon/libxkbcommon/commit/c1e5ac16e77a21f87bdf3bc4dea61b0PatchThird Party Advisory
https://lists.freedesktop.org/archives/wayland-devel/2018-August/039232.htmlMailing ListPatchThird Party Advisory
https://security.gentoo.org/glsa/201810-05Third Party Advisory
https://usn.ubuntu.com/3786-1/Third Party Advisory
https://usn.ubuntu.com/3786-2/Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:2079
https://github.com/xkbcommon/libxkbcommon/commit/c1e5ac16e77a21f87bdf3bc4dea61b0PatchThird Party Advisory
https://lists.freedesktop.org/archives/wayland-devel/2018-August/039232.htmlMailing ListPatchThird Party Advisory
https://security.gentoo.org/glsa/201810-05Third Party Advisory
https://usn.ubuntu.com/3786-1/Third Party Advisory
https://usn.ubuntu.com/3786-2/Third Party Advisory

FAQ

What is CVE-2018-15857?

CVE-2018-15857 is a vulnerability with a CVSS score of 7.8 (HIGH). An invalid free in ExprAppendMultiKeysymList in xkbcomp/ast-build.c in xkbcommon before 0.8.1 could be used by local attackers to crash xkbcommon keymap parsers or possibly have unspecified other impa...

How severe is CVE-2018-15857?

CVE-2018-15857 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2018-15857?

Check the references section above for vendor advisories and patch information. Affected products include: Xkbcommon Libxkbcommon, Xkbcommon Xkbcommon, Canonical Ubuntu Linux.