#VU31832 Race condition in ISC BIND - CVE-2015-8461

Vulnerability identifier: #VU31832

Vulnerability risk: Medium

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:Green]

CVE-ID: CVE-2015-8461

CWE-ID: CWE-362

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
ISC BIND
Server applications / DNS servers

Vendor: ISC

Description

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

Race condition in resolver.c in named in ISC BIND 9.9.8 before 9.9.8-P2 and 9.10.3 before 9.10.3-P2 allows remote attackers to cause a denial of service (INSIST assertion failure and daemon exit) via unspecified vectors.

Mitigation
Install update from vendor's website.

Vulnerable software versions

ISC BIND: 9.9.8-P3

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External links
https://lists.fedoraproject.org/pipermail/package-announce/2015-December/174145.html
https://lists.fedoraproject.org/pipermail/package-announce/2015-December/174252.html
https://www.securityfocus.com/bid/79347
https://www.securitytracker.com/id/1034419
https://www.slackware.com/security/viewer.php?l=slackware-security&y=2015&m=slackware-security.539966
https://kb.isc.org/article/AA-01319
https://kb.isc.org/article/AA-01380
https://kb.isc.org/article/AA-01438

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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.