Denial of Service Vulnerability in lighttpd Web Server by Lighttpd
CVE-2022-41556

7.5HIGH

Key Information:

Vendor

Lighttpd

Status
Lighttpd
Vendor
CVE Published:
6 October 2022

What is CVE-2022-41556?

A resource leak in lighttpd versions 1.4.56 to 1.4.66 arises from improper handling of RDHUP conditions during certain HTTP/1.1 chunked requests. This flaw can lead to connection-slot exhaustion when clients exhibit a significant amount of anomalous TCP behavior, potentially resulting in denial of service. The vulnerability has been addressed in version 1.4.67 of lighttpd.

References

https://git.lighttpd.net/lighttpd/lighttpd1.4/commit/b18d...
https://github.com/lighttpd/lighttpd1.4/pull/115
https://github.com/lighttpd/lighttpd1.4/compare/lighttpd-...

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.