#VU338 Privilege escalation in lighttpd

Vulnerability identifier: #VU338

Vulnerability risk: Low

CVSSv4.0: 0.4 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: N/A

CWE-ID: CWE-61

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
lighttpd
Server applications / Web servers

Vendor: lighttpd

Description

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

The vulnerability exists due to incorrect symlink handling in stat_cache, when “server.follow-symlink” is set to “disable”. A local attacker can overwrite arbitrary files on the target system with privileges of the web server.

Successful exploitation of this vulnerability may allow a local user to obtain elevated privileges.

Mitigation
Update to version 1.4.41.

Vulnerable software versions

lighttpd: 1.4.9 - 1.4.40

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External links
https://www.lighttpd.net/download/

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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.