CVE-2022-41556

High

Description

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.

SeverityHigh

CVSS7.5

Exploit probability—

Product

Lighttpd

PublishedOct 6, 2022

First seenOct 6, 2022

How to fix

Update

lighttpd lighttpd1.4.67 or later

Vendor advisories

lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OVOSBSCMLGCHH2Z74H64ZWVDFJFQTBC2/
security.gentoo.org/glsa/202210-12

Affected products

Product	Affected versions	Fixed in
lighttpd lighttpd	1.4.56 ≤ v < 1.4.67	1.4.67
fedoraproject fedora	35	—

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