Description
The connection_state_machine function (connections.c) in lighttpd 1.4.19 and earlier, and 1.5.x before 1.5.0, allows remote attackers to cause a denial of service (active SSL connection loss) by triggering an SSL error, such as disconnecting before a download has finished, which causes all active SSL connections to be lost.
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 | 1.4.19-2 | — |
| Debian 13 | lighttpd | 1.4.19-2 | — |
| Debian 12 | lighttpd | 1.4.19-2 | — |
| Debian 4.0 | lighttpd | 1.4.13-4etch7 | DSA-1540-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | lighttpd | 1.4.59-2.1 | openSUSE-SU-2024:10585-1 |
Advisories 2
- DSA-1540-1 lighttpd Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:10585-1 lighttpd-1.4.59-2.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
References
- http://trac.lighttpd.net/trac/ticket/285#comment:21
- https://issues.rpath.com/browse/RPL-2407
- https://bugs.gentoo.org/show_bug.cgi?id=214892
- DSA-1540 vendor-advisory
- SUSE-SR:2008:011 vendor-advisory
- 43788 vdb-entry
- http://trac.lighttpd.net/trac/changeset/2136
- FEDORA-2008-3343 vendor-advisory
- GLSA-200804-08 vendor-advisory
- http://trac.lighttpd.net/trac/ticket/285#comment:18
- 30023 third-party-advisory
- 29505 third-party-advisory
- 20080331 rPSA-2008-0132-1 lighttpd mailing-list
- http://wiki.rpath.com/wiki/Advisories:rPSA-2008-0132
- 28489 vdb-entry
- 29636 third-party-advisory
- ADV-2008-1063 vdb-entry
- 29544 third-party-advisory
- lighttpd-sslerror-dos(41545) vdb-entry
- 29649 third-party-advisory
- http://trac.lighttpd.net/trac/changeset/2140
- http://trac.lighttpd.net/trac/changeset/2139
- FEDORA-2008-3376 vendor-advisory