This security advisory describes one low risk vulnerability.
1) Heap-based buffer overflow
Risk: Low
CVSSv3: 7.7 [CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C] [PCI]
CVE-ID: CVE-2020-25712
CWE-ID: CWE-122 - Heap-based Buffer Overflow
Exploit availability: No
Description
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary error within XkbSetDeviceInfo functionality. A local user can pass specially crafted data to the application, trigger heap-based buffer overflow and execute arbitrary code on the target system with elevated privileges.
Mitigation
Install update from vendor's website.
Vulnerable software versions
xorg-server (Alpine package)
Alpine Linux 3.121.20.9-r1
CPE
External links
https://git.alpinelinux.org/aports/commit/?id=f64db6b75e35f3de90155c1b46c555e3e2899b43
Q & A
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.
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