Denial of service in ISC BIND

1) Assertion failure

EUVDB-ID: #VU3848

Risk: Medium

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-2015-8000

CWE-ID: CWE-617 - Reachable Assertion

Exploit availability: No

Description

A remote attacker can trigger denial of service (DoS) conditions.

The vulnerability exists due to a parsing error when processing incoming responses within db.c file. A remote attacker who can cause a server to request a record with a malformed class attribute can use this bug to trigger a REQUIRE assertion, causing named to exit and denying service to clients.

Successful exploitation of this vulnerability may allow an attacker to perform a denial of service (DoS) attack.

Mitigation

Update to version 9.9.8-P2, 9.10.3-P2 or 9.9.8-S3.

Vulnerable software versions

ISC BIND: 9.0.0 - 9.10.3-P1

External links

http://kb.isc.org/article/AA-01317

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.