CVE-2022-30780

Description

Lighttpd 1.4.56 through 1.4.58 allows a remote attacker to cause a denial of service (CPU consumption from stuck connections) because connection_read_header_more in connections.c has a typo that disrupts use of multiple read operations on large headers.

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

Debian

Security tracker ↗

Release	Package	Fixed in	Advisory
Debian 14	lighttpd	1.4.59-1	—
Debian 13	lighttpd	1.4.59-1	—
Debian 12	lighttpd	1.4.59-1	—

Ubuntu

Security tracker ↗

Release	Package	Fixed in	Advisory
Ubuntu Pro 16.04 LTS	lighttpd	No fix yet	—

Public exploits

Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.

Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.

GitHub 2 repositories

p0dalirius/CVE-2022-30780-lighttpd-denial-of-service ★ 17 · May 18, 2022

CVE-2022-30780 - lighttpd remote denial of service
xiw1ll/CVE-2022-30780_Checker ★ 0 · Jul 18, 2024

Lighttpd CVE-2022-30780 checker

Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.

Lighttpd 1.4.56 through 1.4.58 allows a remote attacker to cause a denial of service (CPU consumption from stuck connections) because conne…