CVE-2012-5533

Severity: medium (CVSS 5.0 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 12.0% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2012-11-24 · updated 2026-06-16
Weakness: CWE-399

Description

The http_request_split_value function in request.c in lighttpd before 1.4.32 allows remote attackers to 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.

Affected products

lighttpd: 1.4.31, 1.4.32

References

http://download.lighttpd.net/lighttpd/security/lighttpd-1.4.31_fix_connection_header_dos.patch
http://download.lighttpd.net/lighttpd/security/lighttpd_sa_2012_01.txt
http://lists.opensuse.org/opensuse-updates/2012-11/msg00044.html
http://lists.opensuse.org/opensuse-updates/2014-01/msg00051.html
http://marc.info/?l=bugtraq&m=141576815022399&w=2
http://osvdb.org/87623
http://packetstormsecurity.org/files/118282/Simple-Lighttpd-1.4.31-Denial-Of-Service.html
http://secunia.com/advisories/51268
http://secunia.com/advisories/51298
http://www.exploit-db.com/exploits/22902
http://www.mandriva.com/security/advisories?name=MDVSA-2013:100
http://www.openwall.com/lists/oss-security/2012/11/21/1

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