Remote DoS in bind implementation in Red Hat Enterprise Linux 6

1) Assertion failure

EUVDB-ID: #VU6436

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-2017-3139

CWE-ID: CWE-617 - Reachable Assertion

Exploit availability: No

Description

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

The vulnerability exists due to input validation error when processing DNSSEC validation within the bind package in Red Hat Enterprise Linux 6. A remote unauthenticated attacker can send a specially crafted DNS response and trigger assertion failure.

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

Mitigation

Install update from vendor's website.

Vulnerable software versions

Red Hat Enterprise Linux for x86_64: 6

CPE2.3

• cpe:2.3:o:red_hat:red_hat_enterprise_linux:6:*:*:*:*:*:*:*

External links

https://access.redhat.com/errata/RHSA-2017:1202

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.