QID 150534

Date Published: 2022-06-24

QID 150534: Lighttpd server Denial of service (DoS) Vulnerability (CVE-2022-30780)

Lighttpd is a secure, fast, compliant, and very flexible web-server that has been optimized for high-performance environment.

Affected versions of lighttpd server suffer from a Denial of service (DoS) vulnerability which increases CPU consumption from stuck connections. The vulnerability occurs due to connection_read_header_more in connections.c file which has a typo that disrupts use of multiple read operations on large headers.

Affected versions:
lighttpd version from 1.4.56 to 1.4.58

QID Detection Logic (Unauthenticated):
This QID sends a HTTP GET request and checks the HTTP response headers to confirm if the host is running vulnerable version of lighttpd server.

Successful exploitation of the vulnerability could allows a remote attacker to cause a Denial of service (DoS) attack.

  • CVSS V3 rated as High - 7.5 severity.
  • CVSS V2 rated as Medium - 5 severity.
    • Solution
    Customers are advised to upgrade lighttpd server to latest version to remediate the vulnerability.
    Vendor References

    CVEs related to QID 150534

    CVE-2022-30780 |
    Software Advisories
    Advisory ID Software Component Link
    Lighttpd downloads URL Logo www.lighttpd.net/download/
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