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 81%

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.

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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

81% 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

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