SB2017072703 - Security restrictions bypass in Cisco IOS
Published: August 1, 2017
Security Bulletin ID
SB2017072703
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Security restrictions bypass (CVE-ID: CVE-2017-6770)
CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a remote attacker to bypass security restrictions.
The weakness exists in the Open Shortest Path First (OSPF) Routing Protocol Link State Advertisement (LSA) database due to improper input validation. A remote attacker can send specially crafted unicast or multicast OSPF LSA type 1 packets and take full control of the OSPF Autonomous System (AS) domain routing table, allowing the attacker to intercept or black-hole traffic.
Remediation
Install update from vendor's website.