Vulnerability identifier: #VU15817
Vulnerability risk: Low
CVSSv4.0: 1.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID: CVE-2018-15857
CWE-ID:
CWE-20
Exploitation vector: Local
Exploit availability: No
Vulnerable software:
libxkbcommon
Universal components / Libraries /
Libraries used by multiple products
Vendor: xkbcommon
Description
The vulnerability allows a local attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to an invalid-free error in the ExprAppendMultiKeysymList function, as defined in the xkbcomp/ast-build.c source code file. A local attacker can submit a specially crafted keymap file that submits malicious input and cause the application to crash.
Mitigation
Update to version 0.8.1.
Vulnerable software versions
libxkbcommon: 0.2 - 0.8
External links
https://github.com/xkbcommon/libxkbcommon/commit/c1e5ac16e77a21f87bdf3bc4dea61b037a17dddb
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.