Insecure DLL loading in clamav (Alpine package)

1) Insecure DLL loading

EUVDB-ID: #VU51964

Risk: Low

CVSSv3.1: 7.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-1386

CWE-ID: CWE-427 - Uncontrolled Search Path Element

Exploit availability: No

Description

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

The vulnerability exists due to the application loads DLL libraries in an insecure manner. A local user can place a malicious .dll file in certain location on the system and execute arbitrary code with SYSTEM privileges.

Note, the vulnerability affects Windows installations only.

Mitigation

Install update from vendor's website.

Vulnerable software versions

clamav (Alpine package): 0.100.1-r0 - 0.103.1-r0

External links

http://git.alpinelinux.org/aports/commit/?id=1b7d917fe030bf3a2a5dc76b74c6efab9ab8d08d
http://git.alpinelinux.org/aports/commit/?id=dfedf2e4dc1a591ae6b0801827c0ea03e8386983

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.