Vulnerability identifier: #VU33827

Vulnerability risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2007-1869

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
lighttpd
Server applications / Web servers

Vendor: lighttpd

Description

The vulnerability allows a remote non-authenticated attacker to perform service disruption.

lighttpd 1.4.12 and 1.4.13 allows remote attackers to cause a denial of service (cpu and resource consumption) by disconnecting while lighttpd is parsing CRLF sequences, which triggers an infinite loop and file descriptor consumption.

Mitigation
Install update from vendor's website.

Vulnerable software versions

lighttpd: 1.4.12

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External links
http://secunia.com/advisories/24886
http://secunia.com/advisories/24947
http://secunia.com/advisories/24995
http://secunia.com/advisories/25166
http://secunia.com/advisories/25613
http://security.gentoo.org/glsa/glsa-200705-07.xml
http://www.debian.org/security/2007/dsa-1303
http://www.lighttpd.net/assets/2007/4/13/lighttpd_sa2007_01.txt
http://www.novell.com/linux/security/advisories/2007_007_suse.html
http://www.securityfocus.com/archive/1/466464/30/6900/threaded
http://www.securityfocus.com/bid/23515
http://www.vupen.com/english/advisories/2007/1399
http://exchange.xforce.ibmcloud.com/vulnerabilities/33671
http://issues.rpath.com/browse/RPL-1218

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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.