Vulnerability identifier: #VU52065
Vulnerability risk: Medium
CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-345
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
Dnsmasq
Server applications /
DNS servers
Vendor: GNU
Description
The vulnerability allows a remote attacker to perform a DNS Cache Poisoning attack.
The vulnerability exists due to dnsmasq relies only on transmission ID when processing DNS queries and uses the same port for outgoing requests, when configured to given network interface. A remote attacker can guess the random transmission ID to forge a reply and get it accepted by dnsmasq.As a result, an attacker can perform a DNS Cache Poisoning attack.
Mitigation
Install updates from vendor's website.
Vulnerable software versions
Dnsmasq: 2.0 - 2.84
External links
http://bugzilla.redhat.com/show_bug.cgi?id=1939368
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.