#VU32618 Input validation error in lighttpd - CVE-2012-5533
Vulnerability identifier: #VU32618
Vulnerability risk: Medium
CVSSv4.0: 5.5 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/U:Green]
CVE-ID: CVE-2012-5533
CWE-ID:
CWE-20
Exploitation vector: Network
Exploit availability: Yes
Vulnerable software:
lighttpd
Server applications /
Web servers
Vendor: lighttpd
Description
The vulnerability allows remote attackers to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can cause a denial of service (infinite loop) via a request with a header containing an empty token, as demonstrated using the "Connection: TE,,Keep-Alive" header.
Mitigation
The vendor has issued the following versions to address this vulnerability: 1.4.31, 1.4.32.
Vulnerable software versions
lighttpd: 1.4.1 - 1.4.30
External links
https://download.lighttpd.net/lighttpd/security/lighttpd_sa_2012_01.txt
https://download.lighttpd.net/lighttpd/security/lighttpd-1.4.31_fix_connection_header_dos.patch
https://lists.opensuse.org/opensuse-updates/2012-11/msg00044.html
https://lists.opensuse.org/opensuse-updates/2014-01/msg00051.html
https://marc.info/?l=bugtraq&m=141576815022399&w=2
https://osvdb.org/87623
https://packetstormsecurity.org/files/118282/Simple-Lighttpd-1.4.31-Denial-Of-Service.html
https://secunia.com/advisories/51268
https://secunia.com/advisories/51298
https://www.exploit-db.com/exploits/22902
https://www.mandriva.com/security/advisories?name=MDVSA-2013:100
https://www.openwall.com/lists/oss-security/2012/11/21/1
https://www.securityfocus.com/bid/56619
https://www.securitytracker.com/id?1027802
https://exchange.xforce.ibmcloud.com/vulnerabilities/80213
https://wiki.mageia.org/en/Support/Advisories/MGASA-2012-0345
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. However, proof of concept for this vulnerability is available.
