QID 317304

Date Published: 2023-03-28

QID 317304: Cisco Internetwork Operating System (IOS) XE Software Fragmented Tunnel Protocol Packet Denial of Service (DoS) Vulnerability (cisco-sa-ios-gre-crash-p6nE5Sq5)

A vulnerability in the fragmentation handling code of tunnel protocol packets in Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an affected system to reload, resulting in a denial of service (DoS) condition.

Affected Releases

Cisco IOS XE Software releases 17.9.1, 17.9.1a, or 17.9.1w and have a tunnel interface configured.

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 cause the affected system to reload, resulting in a DoS condition.

  • CVSS V3 rated as Critical - 8.6 severity.
  • CVSS V2 rated as High - 7.8 severity.
    • Solution

    Customers are advised to refer to cisco-sa-ios-gre-crash-p6nE5Sq5 for more information.

    Vendor References

    CVEs related to QID 317304

    CVE-2023-20072 |
    Software Advisories
    Advisory ID Software Component Link
    cisco-sa-ios-gre-crash-p6nE5Sq5 URL Logo sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ios-gre-crash-p6nE5Sq5
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