SB2017100229 - Memory exhaustion in dnsmasq (Alpine package)

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Main Vulnerability Database SB2017100229

SB2017100229 - Memory exhaustion in dnsmasq (Alpine package)

Published: October 2, 2017

Security Bulletin ID SB2017100229
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
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 1 vulnerability.


1) Memory exhaustion (CVE-ID: CVE-2017-14495)

CWE-ID: CWE-400 - Resource exhaustion

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:P/U:Green


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

The vulnerability exists due to incorrect memory allocation (memory is never freed) in  add_pseudoheader() function when processing DNS queries. A remote unauthenticated attacker can send a specially crafted DNS request to the affected service and cause dnsmasq to consume all available memory.

Successful exploitation of this vulnerability may allow an attacker to perform a denial of service (DoS) attack, but requires that dnsmasq is compiled with --add-mac, --add-cpe-id or --add-subnet option.


Remediation

Install update from vendor's website.

References