Security restrictions bypass in bind (Alpine package)

Published: 2017-08-07

Risk	Low
Patch available	YES
Number of vulnerabilities	1
CVE-ID	CVE-2017-3142
CWE-ID	CWE-20
Exploitation vector	Network
Public exploit	N/A
Vulnerable software	bind (Alpine package) Operating systems & Components / Operating system package or component
Vendor	Alpine Linux Development Team

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Security restrictions bypass

EUVDB-ID: #VU7257

Risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2017-3142

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass security restrictions on the target system.

The weakness exists due to an error in TSIG authentication of AXFR and NOTIFY requests. A remote attacker who is able to send and receive messages to an authoritative DNS server and who has knowledge of a valid TSIG key name can send specially crafted request packet, bypass authentication and perform unauthorized zone transfers.

Mitigation

Install update from vendor's website.

Vulnerable software versions

bind (Alpine package): 9.6.1-r0 - 9.10.4_p8-r0

CPE2.3

External links

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.