Denial of Service Vulnerability in lighttpd Web Server by Lighttpd
CVE-2022-37797

7.5HIGH

Key Information:

Vendor

Lighttpd

Status
Vendor
CVE Published:
12 September 2022

What is CVE-2022-37797?

In lighttpd version 1.4.65, a flaw has been identified within the mod_wstunnel module that does not properly initialize a handler function pointer when an invalid HTTP request (specifically during the websocket handshake) is encountered. This oversight can lead to a null pointer dereference, resulting in a crash of the server. An external attacker could potentially exploit this vulnerability to induce a denial of service condition, disrupting service availability for legitimate users.

References

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

.