Memory leak in Dnsmasq - CVE-2017-14494
Published: October 3, 2017
Vulnerability identifier: #VU8663
CSH Severity: Low
CVSS v4.0: 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
CVE-ID: CVE-2017-14494
CWE-ID: CWE-401
Exploitation vector: Adjecent network
Exploit availability:
Public exploit is available
Vendor: GNU
Affected software:
Dnsmasq
Dnsmasq
Detailed vulnerability description
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.
How to mitigate CVE-2017-14494
Update to version 2.78.