SB2023042040 - Denial of service in Dnsmasq 

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Main Vulnerability Database SB2023042040

SB2023042040 - Denial of service in Dnsmasq

Published: April 20, 2023 Updated: July 26, 2024

Security Bulletin ID SB2023042040
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 secuirty vulnerabilities.


1) Resource exhaustion (CVE-ID: CVE-2023-28450)

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

The vulnerability exists due to application does not properly perform fragmentation of UDP packets. A remote attacker can trigger resource exhaustion by sending overly large DNS UDP packets.


2) Integer overflow (CVE-ID: CVE-2023-49441)

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

The vulnerability exists due to integer overflow within the sha256_transform() function in hash-questions.c when comparing hashes. A remote attacker can send specially crafted data to the server, trigger an integer overflow and perform a denial of service (DoS) attack.


Remediation

Install update from vendor's website.

References