CVE-2018-15858
Published: 25 August 2018
Unchecked NULL pointer usage when handling invalid aliases in CopyKeyAliasesToKeymap in xkbcomp/keycodes.c in xkbcommon before 0.8.1 could be used by local attackers to crash (NULL pointer dereference) the xkbcommon parser by supplying a crafted keymap file.
Notes
| Author | Note |
|---|---|
| leosilva | code in trusty is quite different. portions of the code affected are not present so changing to not-affected. |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
libxkbcommon Launchpad, Ubuntu, Debian |
upstream |
Released
(0.8.2-1)
|
| trusty |
Does not exist
(trusty was not-affected)
|
|
| xenial |
Released
(0.5.0-1ubuntu2.1)
|
|
| bionic |
Released
(0.8.0-1ubuntu0.1)
|
|
| cosmic |
Not vulnerable
(0.8.2-1)
|
|
|
Patches: vendor: https://github.com/xkbcommon/libxkbcommon/commit/badb428e63387140720f22486b3acbd3d738859f |
||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 5.5 |
| Attack vector | Local |
| Attack complexity | Low |
| Privileges required | Low |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | None |
| Availability impact | High |
| Vector | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |