SB2018021616 - SUSE Linux update for quagga
Published: February 16, 2018 Updated: February 19, 2018
Security Bulletin ID
SB2018021616
Severity
High
Patch available
YES
Number of vulnerabilities
6
Exploitation vector
Remote access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 6 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.
3) Memory corruption (CVE-ID: CVE-2018-5378)
The vulnerability allows a remote attacker to cause DoS condition on the target system.The weakness exists in the Quagga BGP daemon due to failure to properly bounds check data sent with a NOTIFY to a peer by the Quagga BGP daemon, bgpd. A remote attacker can send specially crafted input and cause the bgpd process or the daemon to crash.
4) 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.
5) 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.
6) 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.