Denial of service in Cisco Wide Area Application Services - CVE-2017-6721
Published: June 23, 2017
Vulnerability identifier: #VU7183
CSH Severity: Low
CVSS v4.0: 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
CVE-ID: CVE-2017-6721
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Cisco Systems, Inc
Affected software:
Cisco Wide Area Application Services
Cisco Wide Area Application Services
Detailed vulnerability description
The vulnerability allows a remote unauthenticated attacker to cause DoS condition on the target system.
The weakness exists in the Cisco Wide Area Application Services (WAAS) due to incomplete input validation of TCP packets when a packet chain is fragmented. A remote attacker can send specially crafted set of TCP fragments, trigger the WAAS to drop traffic ad cause the WAASNET process to restart.
Successful exploitation of the vulnerability results in denial of service.
The weakness exists in the Cisco Wide Area Application Services (WAAS) due to incomplete input validation of TCP packets when a packet chain is fragmented. A remote attacker can send specially crafted set of TCP fragments, trigger the WAAS to drop traffic ad cause the WAASNET process to restart.
Successful exploitation of the vulnerability results in denial of service.
How to mitigate CVE-2017-6721
Install update from vendor's website.