Input validation error in bind (Alpine package)

1) Input validation error

EUVDB-ID: #VU32395

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-2015-5722

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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

buffer.c in named in ISC BIND 9.x before 9.9.7-P3 and 9.10.x before 9.10.2-P4 allows remote attackers to cause a denial of service (assertion failure and daemon exit) by creating a zone containing a malformed DNSSEC key and issuing a query for a name in that zone.

Mitigation

Install update from vendor's website.

Vulnerable software versions

bind (Alpine package): 9.6.1-r0 - 9.9.7_p2-r0

CPE2.3

• cpe:2.3:a:alpine:bind_alpine_package:9.6.1-r0:*:*:*:*:alpine_linux:*:1.10
• cpe:2.3:a:alpine:bind_alpine_package:9.7.1-r0:*:*:*:*:alpine_linux:*:2.0
• cpe:2.3:a:alpine:bind_alpine_package:9.7.3-r0:*:*:*:*:alpine_linux:*:2.1

External links

https://git.alpinelinux.org/aports/commit/?id=aee6c4042fbea34641049c32be4257b5184119a3
https://git.alpinelinux.org/aports/commit/?id=5ddb436670c7d282df28ecd0ec466df347bc1ca5
https://git.alpinelinux.org/aports/commit/?id=dab328e1329ab09008efdb1b5365984a6c0aa2f6

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.