SB20170807105 - Security restrictions bypass in bind (Alpine package)
Published: August 7, 2017
Security Bulletin ID
SB20170807105
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Security restrictions bypass (CVE-ID: CVE-2017-3142)
CWE-ID: CWE-20 - Improper input validation
CVSSv4: 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
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.
Remediation
Install update from vendor's website.
References
- https://git.alpinelinux.org/aports/commit/?id=29b8d297dd717c6b2d21833badc8e5fc3d596b37
- https://git.alpinelinux.org/aports/commit/?id=071ec64d669cacbc578f4768912be8c27488ddb8
- https://git.alpinelinux.org/aports/commit/?id=1bc9533e929b3ad0f241338871b7c7dd64e2d940
- https://git.alpinelinux.org/aports/commit/?id=3bb085e3385115c783951d713392f492751cd08b
- https://git.alpinelinux.org/aports/commit/?id=278a530682c0799cf3e11c862c4f1bce93c287e9
- https://git.alpinelinux.org/aports/commit/?id=4105cc0c96fb20b95bd9f54160b62af7ca88cd72
- https://git.alpinelinux.org/aports/commit/?id=678f234c682be06018570ae854e6749b50a56528
- https://git.alpinelinux.org/aports/commit/?id=e049b1d35bb80fed35d73f2ddbdf64484041442d