SB2017100228 - Memory leak in dnsmasq (Alpine package)

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Main Vulnerability Database SB2017100228

SB2017100228 - Memory leak in dnsmasq (Alpine package)

Published: October 2, 2017

Security Bulletin ID SB2017100228
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Adjecent network
Highest impact Information disclosure

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Memory leak (CVE-ID: CVE-2017-14494)

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

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


The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to memory leak when processing DHCPv6 requests. A remote unauthenticated attacker on local network can send specially crafted DHCPv6 request to the affected service and cause dnsmasq to forward memory from outside the packet buffer to a DHCPv6 server when acting as a relay.

Successful exploitation of this vulnerability may allow an attacker to read parts of memory from the affected system and bypass ASLR.


Remediation

Install update from vendor's website.

References