Denial of service in ISC BIND

1) Use-after-free error

EUVDB-ID: #VU10030

Risk: Low

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-3145

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The weakness exists due to improper sequencing cleanup operations on upstream recursion fetch contexts. A remote attacker can trigger use-after-free error that may lead to assertion failure and cause the BIND name server (named) process to crash.

Successful exploitation of the vulnerability results in denial of service.

Mitigation

Update to version 9.9.11-P1, 9.10.6-P1, 9.11.2-P1 or 9.12.0rc2.

Vulnerable software versions

ISC BIND: 9.9.9 rc1 - 9.12.0a1

External links

http://kb.isc.org/article/AA-01542

Q & A

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.