CVE-2012-5533
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:…
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 12.0%, higher than 96% of all known CVEs. Patch or mitigate before the next change window.
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.
- CVSS 2.0
- 5.0 MEDIUMAV:N/AC:L/Au:N/C:N/I:N/A:P
- EPSS
- 12.04% probability · 96th percentile
- Public exploits
- 1 in Exploit-DB · first 22 November 2012
- CISA KEV
- Not listed
- Weakness
- CWE-399
- Affected
- lighttpd/lighttpd
- Source
- secalert@redhat.com
EPSS 12.0% since 4 November 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
Public exploits (1)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
References
- http://download.lighttpd.net/lighttpd/security/lighttpd-1.4.31_fix_connection_header_dos.patchPatch
- http://download.lighttpd.net/lighttpd/security/lighttpd_sa_2012_01.txtVendor Advisory
- 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/51268Vendor Advisory
- http://secunia.com/advisories/51298Vendor Advisory
- http://www.exploit-db.com/exploits/22902Exploit
- http://www.mandriva.com/security/advisories?name=MDVSA-2013:100
- http://www.openwall.com/lists/oss-security/2012/11/21/1
- http://www.securityfocus.com/bid/56619Exploit
- http://www.securitytracker.com/id?1027802
- https://exchange.xforce.ibmcloud.com/vulnerabilities/80213
- https://wiki.mageia.org/en/Support/Advisories/MGASA-2012-0345
- http://download.lighttpd.net/lighttpd/security/lighttpd-1.4.31_fix_connection_header_dos.patchPatch
- http://download.lighttpd.net/lighttpd/security/lighttpd_sa_2012_01.txtVendor Advisory
- 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/51268Vendor Advisory
- http://secunia.com/advisories/51298Vendor Advisory
- http://www.exploit-db.com/exploits/22902Exploit
- http://www.mandriva.com/security/advisories?name=MDVSA-2013:100
- http://www.openwall.com/lists/oss-security/2012/11/21/1
- http://www.securityfocus.com/bid/56619Exploit
- http://www.securitytracker.com/id?1027802
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.