#VU31831 Input validation error in ISC BIND - CVE-2016-2088

Vulnerability identifier: #VU31831

Vulnerability risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2016-2088

CWE-ID: CWE-20

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 a crash the entire system.

resolver.c in named in ISC BIND 9.10.x before 9.10.3-P4, when DNS cookies are enabled, allows remote attackers to cause a denial of service (INSIST assertion failure and daemon exit) via a malformed packet with more than one cookie option.

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/2016-April/181036.html
https://lists.fedoraproject.org/pipermail/package-announce/2016-March/178831.html
https://lists.fedoraproject.org/pipermail/package-announce/2016-March/179904.html
https://www.securityfocus.com/bid/84290
https://www.securitytracker.com/id/1035238
https://kb.isc.org/article/AA-01351
https://kb.isc.org/article/AA-01380
https://security.gentoo.org/glsa/201610-07

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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.