SB2017072003 - Amazon Linux AMI update for bind
Published: July 20, 2017
Security Bulletin ID
SB2017072003
Severity
Medium
Patch available
YES
Number of vulnerabilities
2
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 2 secuirty vulnerabilities.
1) Security restrictions bypass (CVE-ID: CVE-2017-3143)
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 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, manipulate the malicious zone content and accept unauthorized dynamic updates.
2) Security restrictions bypass (CVE-ID: CVE-2017-3142)
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.