SB2017042707 - Amazon Linux AMI update for bind
Published: April 27, 2017
Security Bulletin ID
SB2017042707
Severity
Medium
Patch available
YES
Number of vulnerabilities
2
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 2 secuirty vulnerabilities.
1) Assertion failure (CVE-ID: CVE-2017-3136)
The vulnerability allows a remote authenticated attacker to perform a denial of service (DoS) attack.The vulnerability exists due to the servers are configured to use DNS64 and if the option "break-dnssec yes;" is in use. A remote attacker can supply specially crafted queries, if it was configured to use the DNS64 feature and other preconditions were met, trigger a server using DNS64 assertion failure and cause the service to crash.
2) Assertion failure (CVE-ID: CVE-2017-3137)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.The vulnerability exists due to improper input validation when processing query response containing CNAME or DNAME resource records in an unusual order in BIND. A remote attacker can trigger assertion failure and crash BIND application.
Remediation
Install update from vendor's website.