SB2017070608 - Two vulnerabilities in Cisco IOS XR
Published: July 6, 2017
Security Bulletin ID
SB2017070608
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
2
Exploitation vector
Remote access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 2 vulnerabilities.
1) Denial of service (CVE-ID: CVE-2017-6731)
CWE-ID: CWE-20 - Improper input validation
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a remote unauthenticated attacker to cause DoS condition.
The weakness exists in Multicast Source Discovery Protocol (MSDP) ingress packet processing for Cisco IOS XR Software due to incorrect error handling of an MSDP packet that contains an error in the packet header. A remote attacker can send a malformed MSDP packet for an established MSDP session and cause the MSDP session to restart.
Successful exploitation of the vulnerability results in denial of service.
2) Privilege escalation (CVE-ID: CVE-2017-6728)
CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local attacker to execute arbitrary code on the target system.
The weakness exists in in the CLI of Cisco IOS XR Software due to incorrect permissions. A local attacker can execute arbitrary code with root privileges.
Successful exploitation of the vulnerability may result in system compromise.
Remediation
Install update from vendor's website.