SB2009092001 - Gentoo update for Dnsmasq

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Main Vulnerability Database SB2009092001

SB2009092001 - Gentoo update for Dnsmasq

Published: September 20, 2009 Updated: June 28, 2025

Security Bulletin ID SB2009092001
Severity
High
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Adjecent network
Highest impact Code execution

Breakdown by Severity

High 50% Medium 50%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 secuirty vulnerabilities.


1) Heap-based buffer overflow (CVE-ID: CVE-2009-2957)

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error within the tftp_request() function in tftp.c. A remote attacker can send a long filename in a TFTP packet, trigger a heap-based buffer overflow and execute arbitrary code on the system.


2) NULL pointer dereference (CVE-ID: CVE-2009-2958)

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 tftp_request() function in tftp.c. A remote attacker can trigger denial of service conditions via a TFTP read (aka RRQ) request with a malformed blksize option.


Remediation

Install update from vendor's website.

References