#VU8664 Memory exhaustion in Dnsmasq - CVE-2017-14495
Published: October 3, 2017
Vulnerability identifier: #VU8664
Vulnerability risk: Medium
CVSSv4.0: 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
CVE-ID: CVE-2017-14495
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability:
Public exploit is available
Vulnerable software:
Dnsmasq
Dnsmasq
Software vendor:
GNU
GNU
Description
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
Update to version 2.78.