Vulnerability Description
Unchecked NULL pointer usage when parsing invalid atoms in ExprResolveLhs in xkbcomp/expr.c in xkbcommon before 0.8.2 could be used by local attackers to crash (NULL pointer dereference) the xkbcommon parser by supplying a crafted keymap file, because lookup failures are mishandled.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Xkbcommon | Libxkbcommon | <= 0.8.1 |
| Xkbcommon | Xkbcommon | <= 0.8.1 |
| Canonical | Ubuntu Linux | 14.04 |
Related Weaknesses (CWE)
References
- https://access.redhat.com/errata/RHSA-2019:2079
- https://github.com/xkbcommon/libxkbcommon/commit/bb4909d2d8fa6b08155e449986a4781PatchThird Party Advisory
- https://lists.freedesktop.org/archives/wayland-devel/2018-August/039243.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/bb4909d2d8fa6b08155e449986a4781PatchThird Party Advisory
- https://lists.freedesktop.org/archives/wayland-devel/2018-August/039243.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-2018-15859?
CVE-2018-15859 is a vulnerability with a CVSS score of 5.5 (MEDIUM). Unchecked NULL pointer usage when parsing invalid atoms in ExprResolveLhs in xkbcomp/expr.c in xkbcommon before 0.8.2 could be used by local attackers to crash (NULL pointer dereference) the xkbcommon...
How severe is CVE-2018-15859?
CVE-2018-15859 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2018-15859?
Check the references section above for vendor advisories and patch information. Affected products include: Xkbcommon Libxkbcommon, Xkbcommon Xkbcommon, Canonical Ubuntu Linux.