#VU10030 Use-after-free error in ISC BIND - CVE-2017-3145

Vulnerability identifier: #VU10030

Vulnerability risk: Low

CVSSv4.0: 6.6 [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:U/U:Clear]

CVE-ID: CVE-2017-3145

CWE-ID: CWE-416

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
ISC BIND
Server applications / DNS servers

Vendor: ISC

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

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External links
https://kb.isc.org/article/AA-01542

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Q & A

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.