CVE-2022-41556
Published: 6 October 2022
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.
Priority
Status
| Package | Release | Status |
|---|---|---|
|
lighttpd Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(code not present)
|
| focal |
Not vulnerable
(code not present)
|
|
| jammy |
Released
(1.4.63-1ubuntu3.1)
|
|
| kinetic |
Released
(1.4.65-2ubuntu1.1)
|
|
| lunar |
Ignored
(end of life, was needed)
|
|
| mantic |
Not vulnerable
(1.4.67-1ubuntu2)
|
|
| trusty |
Needs triage
|
|
| upstream |
Released
(1.4.67)
|
|
| xenial |
Not vulnerable
(code not present)
|
|
|
Patches: upstream: https://github.com/lighttpd/lighttpd1.4/commit/b18de6f9264f914f7bf493abd3b6059343548e50 |
||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 7.5 |
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | None |
| Availability impact | High |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |