SB2018021608 - Ubuntu update for Quagga
Published: February 16, 2018
Security Bulletin ID
SB2018021608
Severity
High
Patch available
YES
Number of vulnerabilities
4
Exploitation vector
Remote access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 4 secuirty vulnerabilities.
1) Double free memory error (CVE-ID: CVE-2018-5379)
The vulnerability allows a remote attacker to cause DoS condition on the target system.The weakness exists in the Quagga BGP daemon due to double-free memory when processing certain forms of UPDATE message, containing cluster-list and/or unknown attributes. A remote attacker can supply specially crafted input, trigger bqpd to crash and execute arbitrary code.
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.
3) Out-of-bounds read (CVE-ID: CVE-2018-5380)
The vulnerability allows a remote attacker to obtain potentially sensitive information or cause DoS condition on the target system.The weakness exists in the Quagga BGP daemon due to out-of-bounds read. A remote attacker send a specially crafted input, overrun internal BGP code-to-string conversion tables used for debug by 1 pointer value and read arbitrary data or cause a denial of service.
4) Infinite loop (CVE-ID: CVE-2018-5381)
The vulnerability allows a remote attacker to cause DoS condition on the target system.The weakness exists in the Quagga BGP daemon due to improper handling of invalid OPEN messages. A remote attacker can trigger infinite loop and cause the service to crash.
Successful exploitation of the vulnerability results in denial of service.
Remediation
Install update from vendor's website.