SB2017103113 - Ubuntu update for Quagga
Published: October 31, 2017
Security Bulletin ID
SB2017103113
Severity
Low
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) Denial of service (CVE-ID: CVE-2017-16227)
The vulnerability allows a remote attacker to cause DoS condition on the target system.The weakness exists in the Quagga BGP daemon due to AS_PATH size calculation for long paths counts certain bytes twice and consequently constructs an invalid message. A remote attacker can іsupply specially crafted BGP UPDATE messages and cause session drop.
2) Memory corruption (CVE-ID: CVE-2017-5495)
The vulnerability allows a remote attacker to cause DoS condition on the target system.The weakness exists due to unbounded memory allocation in the telnet 'vty' CLI. A remote attacker able to connect to the TCP ports can send very long strings without a newline, cause the Quagga daemon to allocate unbounded memory and system crash.
Remediation
Install update from vendor's website.