Input validation error in bind (Alpine package)

1) Input validation error

EUVDB-ID: #VU32321

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-2016-1285

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to a crash the entire system.

named in ISC BIND 9.x before 9.9.8-P4 and 9.10.x before 9.10.3-P4 does not properly handle DNAME records when parsing fetch reply messages, which allows remote attackers to cause a denial of service (assertion failure and daemon exit) via a malformed packet to the rndc (aka control channel) interface, related to alist.c and sexpr.c.

Mitigation

Install update from vendor's website.

Vulnerable software versions

bind (Alpine package): 9.6.1-r0 - 9.10.3_p3-r1

CPE2.3

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

External links

https://git.alpinelinux.org/aports/commit/?id=cc2653729b75ff9137c3a4f50e2984a8d807cf41
https://git.alpinelinux.org/aports/commit/?id=8b571b68d5ba963a333609d0bf9fb345afa09238
https://git.alpinelinux.org/aports/commit/?id=f9aa3b90d2882bdc25d0159936a40252bef28990
https://git.alpinelinux.org/aports/commit/?id=042135a07668e262a438da14a580aa147d7fb7d3

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.