Denial of Service Vulnerability in Lighttpd Server
CVE-2022-30780

7.5HIGH

Key Information:

Vendor

Lighttpd

Status
Lighttpd
Vendor
CVE Published:
11 June 2022

Badges

👾 Exploit Exists🟡 Public PoC🟣 EPSS 75%

What is CVE-2022-30780?

A flaw in Lighttpd versions 1.4.56 to 1.4.58 allows remote attackers to exploit a typo in the connection_read_header_more function within connections.c. This typo can lead to excessive CPU consumption due to stuck connections, potentially causing a denial of service. This issue arises specifically when handling multiple read operations on large headers, impacting server performance and availability.

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2022-30780-lighttpd-denial-of-service
Created by p0dalirius

References

https://github.com/lighttpd/lighttpd1.4
x_refsource_MISC
https://redmine.lighttpd.net/issues/3059
x_refsource_MISC
https://podalirius.net/en/cves/2022-30780/
x_refsource_MISC

EPSS Score

75% chance of being exploited in the next 30 days.

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

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability Reserved

.