#VU32621 Use-after-free in lighttpd - CVE-2013-4560

Vulnerability identifier: #VU32621

Vulnerability risk: Low

CVSSv4.0: 1.7 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2013-4560

CWE-ID: CWE-416

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
lighttpd
Server applications / Web servers

Vendor: lighttpd

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error when processing unspecified vectors that trigger FAMMonitorDirectory failures. A remote attackers can cause a denial of service (segmentation fault and crash).

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Mitigation
Update to version 1.4.33.

Vulnerable software versions

lighttpd: 1.4.1 - 1.4.32

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External links
https://download.lighttpd.net/lighttpd/security/lighttpd_sa_2013_03.txt
https://lists.opensuse.org/opensuse-updates/2014-01/msg00049.html
https://marc.info/?l=bugtraq&m=141576815022399&w=2
https://secunia.com/advisories/55682
https://www.openwall.com/lists/oss-security/2013/11/12/4
https://www.debian.org/security/2013/dsa-2795

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.