QID 317055

Date Published: 2021-09-27

QID 317055: Cisco Internetwork Operating System (IOS) XE Software Protection Against Distributed Denial of Service (DoS) Attacks Feature Vulnerability (cisco-sa-zbfw-tguGuYq)

A vulnerability in the Protection Against Distributed Denial of Service Attacks feature of Cisco (IOS XE) Software
could allow an unauthenticated, remote attacker to conduct denial of service (DoS) attacks to or through the affected device.

Affected Products
Cisco IOS XE Software releases 17.3.1 and later (but earlier than the first fixed release) if the software was in autonomous or controller mode and had one of the following enabled:
Half-opened connections limit
TCP SYN flood limit
TCP SYN cookie feature
Note: No support for IOS XE-SDWAN software

QID Detection Logic (Authenticated):
The check matches Cisco IOS XE version retrieved via Unix Auth using "show version" command.
QID Detection Logic (Unauthenticated):
The check matches Cisco IOS XE version retrieved via SNMP or TCP/IP Fingerprint or NTP or Telnet.

A successful exploit could allow the attacker to initiate a DoS attack to or through an affected device.

CVSS V3 rated as Critical - 8.6 severity.

CVSS V2 rated as Medium - 5 severity.

Solution

Customers are advised to refer to cisco-sa-zbfw-tguGuYq for more information.

Vendor References

cisco-sa-zbfw-tguGuYq - tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-zbfw-tguGuYq

CVEs related to QID 317055

CVE-2021-34697 |

Software Advisories

Advisory ID	Software	Component	Link
cisco-sa-zbfw-tguGuYq			tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-zbfw-tguGuYq

By selecting these links, you may be leaving CVEreport webspace. We have provided these links to other websites because they may have information that would be of interest to you. No inferences should be drawn on account of other sites being referenced, or not, from this page. There may be other websites that are more appropriate for your purpose. CVEreport does not necessarily endorse the views expressed, or concur with the facts presented on these sites. Further, CVEreport does not endorse any commercial products that may be mentioned on these sites. Please address comments about any linked pages to [email protected].