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A resource leak in gw_backend.c in lighttpd 1.4.56 through 1.4.66 could lead to a denial of service (connection-slot exhaustion) after a large amount of anomalous TCP behavior by clients. It is related to RDHUP mishandling in certain HTTP/1.1 chunked situations. Use of mod_fastcgi is, for example, affected. This is fixed in 1.4.67.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade lighttpd | Mar 26, 2024 | Oct 6, 2022 |
| Arch Linux | — | Upgrade to the latest version of Arch Linux | Jul 11, 2025 | Oct 6, 2022 |
| Debian | — | Upgrade lighttpd | Nov 4, 2022 | Oct 6, 2022 |
| Gentoo Linux | — | Upgrade www-servers/lighttpd. | Oct 31, 2022 | Oct 6, 2022 |
| Http Lighttpd | — | Upgrade to the latest version of lighttpd | Sep 19, 2024 | Oct 6, 2022 |
| Suse | — | Upgrade lighttpd-mod_magnetUpgrade lighttpd-mod_authn_saslUpgrade lighttpdUpgrade lighttpd-mod_rrdtoolUpgrade lighttpd-mod_vhostdb_mysqlUpgrade lighttpd-mod_vhostdb_pgsqlUpgrade lighttpd-mod_vhostdb_dbiUpgrade lighttpd-mod_vhostdb_ldapUpgrade lighttpd-mod_authn_pamUpgrade lighttpd-mod_authn_gssapiUpgrade lighttpd-mod_maxminddbUpgrade lighttpd-mod_authn_ldapUpgrade lighttpd-mod_webdav | Oct 26, 2022 | Oct 6, 2022 |
| Ubuntu | — | Upgrade lighttpd | Mar 22, 2023 | Oct 6, 2022 |
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