Double Free in libx11 (Alpine package)



Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2020-14363
CWE-ID CWE-415
Exploitation vector Local
Public exploit N/A
Vulnerable software
 libx11 (Alpine package)
Operating systems & Components / Operating system package or component

Vendor Alpine Linux Development Team

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Double Free

EUVDB-ID: #VU46027

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-14363

CWE-ID: CWE-415 - Double Free

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a boundary error when handling locales in LibX11. A local user can run a specially crafted program to trigger integer overflow and double free and execute arbitrary code on the system with elevated privileges.

Mitigation

Install update from vendor's website.

Vulnerable software versions

libx11 (Alpine package): 1.6.2-r0 - 1.6.12-r0

CPE2.3 External links

https://git.alpinelinux.org/aports/commit/?id=20bb499dea3a44f37f1fe80fd02eae7aed38d451


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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