lighttpd: 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...
CVE-2022-41556 is fixed in 18 products on 1 platform, first by lighttpd 1.4.63-1ubuntu3.1, released October 6, 2022. It is not reported as exploited. Patch Radar priority: High.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| lighttpd · Debian 12.15 (bookworm) | 1.4.67-1 | DEBIAN-CVE-2022-41556 | Oct 6, 2022 |
| lighttpd · Debian 13.5 (trixie) | 1.4.67-1 | DEBIAN-CVE-2022-41556 | Oct 6, 2022 |
| lighttpd · Debian 14 | 1.4.67-1 | DEBIAN-CVE-2022-41556 | Oct 6, 2022 |
| lighttpd · Ubuntu 22.04.1 LTS (jammy) | 1.4.63-1ubuntu3.1 | lighttpd 1.4.63-1ubuntu3.1 | Oct 6, 2022 |
| lighttpd-mod-authn-gssapi · Ubuntu 22.04.1 LTS (jammy) | 1.4.63-1ubuntu3.1 | lighttpd-mod-authn-gssapi 1.4.63-1ubuntu3.1 | Oct 6, 2022 |
| lighttpd-mod-authn-pam · Ubuntu 22.04.1 LTS (jammy) | 1.4.63-1ubuntu3.1 | lighttpd-mod-authn-pam 1.4.63-1ubuntu3.1 | Oct 6, 2022 |
| lighttpd-mod-authn-sasl · Ubuntu 22.04.1 LTS (jammy) | 1.4.63-1ubuntu3.1 | lighttpd-mod-authn-sasl 1.4.63-1ubuntu3.1 | Oct 6, 2022 |
| lighttpd-mod-deflate · Ubuntu 22.04.1 LTS (jammy) | 1.4.63-1ubuntu3.1 | lighttpd-mod-deflate 1.4.63-1ubuntu3.1 | Oct 6, 2022 |
| lighttpd-mod-geoip · Ubuntu 22.04.1 LTS (jammy) | 1.4.63-1ubuntu3.1 | lighttpd-mod-geoip 1.4.63-1ubuntu3.1 | Oct 6, 2022 |
| lighttpd-mod-maxminddb · Ubuntu 22.04.1 LTS (jammy) | 1.4.63-1ubuntu3.1 | lighttpd-mod-maxminddb 1.4.63-1ubuntu3.1 | Oct 6, 2022 |
| lighttpd-mod-mbedtls · Ubuntu 22.04.1 LTS (jammy) | 1.4.63-1ubuntu3.1 | lighttpd-mod-mbedtls 1.4.63-1ubuntu3.1 | Oct 6, 2022 |
| lighttpd-mod-nss · Ubuntu 22.04.1 LTS (jammy) | 1.4.63-1ubuntu3.1 | lighttpd-mod-nss 1.4.63-1ubuntu3.1 | Oct 6, 2022 |
| lighttpd-mod-openssl · Ubuntu 22.04.1 LTS (jammy) | 1.4.63-1ubuntu3.1 | lighttpd-mod-openssl 1.4.63-1ubuntu3.1 | Oct 6, 2022 |
| lighttpd-mod-trigger-b4-dl · Ubuntu 22.04.1 LTS (jammy) | 1.4.63-1ubuntu3.1 | lighttpd-mod-trigger-b4-dl 1.4.63-1ubuntu3.1 | Oct 6, 2022 |
| lighttpd-mod-vhostdb-pgsql · Ubuntu 22.04.1 LTS (jammy) | 1.4.63-1ubuntu3.1 | lighttpd-mod-vhostdb-pgsql 1.4.63-1ubuntu3.1 | Oct 6, 2022 |
| lighttpd-mod-webdav · Ubuntu 22.04.1 LTS (jammy) | 1.4.63-1ubuntu3.1 | lighttpd-mod-webdav 1.4.63-1ubuntu3.1 | Oct 6, 2022 |
| lighttpd-mod-wolfssl · Ubuntu 22.04.1 LTS (jammy) | 1.4.63-1ubuntu3.1 | lighttpd-mod-wolfssl 1.4.63-1ubuntu3.1 | Oct 6, 2022 |
| lighttpd-modules-dbi · Ubuntu 22.04.1 LTS (jammy) | 1.4.63-1ubuntu3.1 | lighttpd-modules-dbi 1.4.63-1ubuntu3.1 | Oct 6, 2022 |
| lighttpd-modules-ldap · Ubuntu 22.04.1 LTS (jammy) | 1.4.63-1ubuntu3.1 | lighttpd-modules-ldap 1.4.63-1ubuntu3.1 | Oct 6, 2022 |
| lighttpd-modules-lua · Ubuntu 22.04.1 LTS (jammy) | 1.4.63-1ubuntu3.1 | lighttpd-modules-lua 1.4.63-1ubuntu3.1 | Oct 6, 2022 |
| lighttpd-modules-mysql · Ubuntu 22.04.1 LTS (jammy) | 1.4.63-1ubuntu3.1 | lighttpd-modules-mysql 1.4.63-1ubuntu3.1 | Oct 6, 2022 |
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