Input validation error in bind (Alpine package)

1) Input validation error

EUVDB-ID: #VU4350

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-2016-9444

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause denial of service conditions.

The vulnerability exists due to assertion failure when processing input data. A remote attacker can send a specially crafted DS resource record in an answer, trigger assertion failure and cause denial of service.

Successful exploitation of the vulnerability will result in DoS attack against vulnerable application.

Mitigation

Install update from vendor's website.

Vulnerable software versions

bind (Alpine package): 9.8.5-r0 - 9.10.4_p4-r0

CPE2.3

• cpe:2.3:o:alpine:bind_alpine_package:9.8.5-r0:*:*:*:*:alpine_linux:*:2.3
• cpe:2.3:o:alpine:bind_alpine_package:9.8.5_p1-r0:*:*:*:*:alpine_linux:*:2.3
• cpe:2.3:o:alpine:bind_alpine_package:9.8.5_p2-r0:*:*:*:*:alpine_linux:*:2.3

External links

https://git.alpinelinux.org/aports/commit/?id=786e56cd1d9c5dbf95e539a900e486b25673fade
https://git.alpinelinux.org/aports/commit/?id=c38ff6c4c17ad578319bf6efda6b7f8ccd21640b
https://git.alpinelinux.org/aports/commit/?id=95378b844fdafeac63ebaaa24ca8f0b0da3f3978
https://git.alpinelinux.org/aports/commit/?id=50ad495539ff98e25828fd2aee3bf1a67a6c3195
https://git.alpinelinux.org/aports/commit/?id=db19c120bc6d032b9f6fa773b7875be828dcfd62
https://git.alpinelinux.org/aports/commit/?id=859db39dd1ffc64c813d886d9fa7a4eb04e08024

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.