Vulnerability Details : CVE-2018-15859
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.
Vulnerability category: Memory Corruption
Products affected by CVE-2018-15859
- cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
- cpe:2.3:a:xkbcommon:libxkbcommon:*:*:*:*:*:*:*:*
- cpe:2.3:a:xkbcommon:xkbcommon:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2018-15859
0.05%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 12 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2018-15859
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
2.1
|
LOW | AV:L/AC:L/Au:N/C:N/I:N/A:P |
3.9
|
2.9
|
NIST | |
|
5.5
|
MEDIUM | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
1.8
|
3.6
|
NIST |
CWE ids for CVE-2018-15859
-
The product dereferences a pointer that it expects to be valid but is NULL.Assigned by: nvd@nist.gov (Primary)
References for CVE-2018-15859
-
https://usn.ubuntu.com/3786-1/
USN-3786-1: libxkbcommon vulnerabilities | Ubuntu security noticesThird Party Advisory
-
https://lists.freedesktop.org/archives/wayland-devel/2018-August/039243.html
[ANNOUNCE] libxkbcommon 0.8.2Mailing List;Patch;Third Party Advisory
-
https://security.gentoo.org/glsa/201810-05
xkbcommon: Multiple vulnerabilities (GLSA 201810-05) — Gentoo securityThird Party Advisory
-
https://access.redhat.com/errata/RHSA-2019:2079
RHSA-2019:2079 - Security Advisory - Red Hat Customer Portal
-
https://github.com/xkbcommon/libxkbcommon/commit/bb4909d2d8fa6b08155e449986a478101e2b2634
Fail expression lookup on invalid atoms · xkbcommon/libxkbcommon@bb4909d · GitHubPatch;Third Party Advisory
-
https://usn.ubuntu.com/3786-2/
USN-3786-2: libxkbcommon vulnerabilities | Ubuntu security noticesThird Party Advisory
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