Description
request.c in lighttpd 1.4.15 allows remote attackers to cause a denial of service (daemon crash) by sending an HTTP request with duplicate headers, as demonstrated by a request containing two Location header lines, which results in a segmentation fault.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | lighttpd | 1.4.16-1 | — |
| Debian 13 | lighttpd | 1.4.16-1 | — |
| Debian 12 | lighttpd | 1.4.16-1 | — |
| Debian 4.0 | lighttpd | 1.4.13-4etch4 | DSA-1362-1 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
Exploit-DB 1
- Lighttpd 1.4.15 - Multiple Code Execution / Denial of Service / Information Disclosure Vulnerabilities EDB-30322 · remote · Apr 16, 2007 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 1
- DSA-1362-1 lighttpd - several vulnerabilities Debian Security (DSA / DLA) · Mar 9, 2026
References
- 26158 third-party-advisory
- http://trac.lighttpd.net/trac/changeset/1869
- 38313 vdb-entry
- ADV-2007-2585 vdb-entry
- 26130 third-party-advisory
- 20070719 rPSA-2007-0145-1 lighttpd mailing-list
- 24967 vdb-entry
- 26593 third-party-advisory
- http://trac.lighttpd.net/trac/ticket/1232
- DSA-1362 vendor-advisory
- GLSA-200708-11 vendor-advisory
- SUSE-SR:2007:015 vendor-advisory
- 26505 third-party-advisory