This security bulletin contains one medium risk vulnerability.
CWE-617 - Reachable Assertion
Exploit availability: NoDescription
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a reachable assertion when sending large responses over UDP. If
named attempts to respond over UDP
with a response that is larger than the current effective interface
maximum transmission unit (MTU), and if response-rate limiting (RRL) is
active, an assertion failure is triggered. A remote attacker can force named to trigger the assertion failure and perform a denial of service attack.
Install updates from vendor's website.Vulnerable software versions
ISC BIND: 9.16.19 - 9.17.16
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
How the attacker can exploit this vulnerability?
The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.