SB2022092908 - Debian update for lighttpd

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Main Vulnerability Database SB2022092908

SB2022092908 - Debian update for lighttpd

Published: September 29, 2022

Security Bulletin ID SB2022092908
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 vulnerabilities.


1) NULL pointer dereference (CVE-ID: CVE-2022-37797)

CWE-ID: CWE-476 - NULL Pointer Dereference

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error within the mod_wstunnel module when handling invalid HTTP requests. A remote attacker can send specially crafted HTTP requests to the affected web server and perform a denial of service (DoS) attack.


2) Memory leak (CVE-ID: CVE-2022-41556)

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows a remote attacker to perform DoS attack on the target system.

The vulnerability exists due memory leak within the mod_fastcgi and mod_scgi modules when handling a large number of incorrect HTTP requests. A remote attacker can send multiple incorrect HTTP requests to the web server and perform denial of service attack.


Remediation

Install update from vendor's website.

References