QID 316898

Date Published: 2021-03-26

QID 316898: Cisco IOS XE Software DECnet Phase IV/OSI Denial of Service Vulnerability(cisco-sa-iosxe-decnet-dos-cuPWDkyL)

A vulnerability in the DECnet Phase IV and DECnet/OSI protocol processing
of Cisco IOS XE Software could allow an unauthenticated,
adjacent attacker to cause a denial of service (DoS) condition on an affected device.

Affected Products
Cisco devices if they are running a vulnerable release of Cisco IOS XE Software
and have either the DECnet Phase IV or DECnet/OSI protocol enabled.
DECnet is not enabled by default. Note: Potential detection as cannot confirm if DECnet is configured on all interfaces.

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 device to reload, resulting in a DoS condition.

  • CVSS V3 rated as High - 6.5 severity.
  • CVSS V2 rated as Low - 2.9 severity.
    • Solution

    Customers are advised to refer to cisco-sa-iosxe-decnet-dos-cuPWDkyL for more information.

    Vendor References

    CVEs related to QID 316898

    CVE-2021-1352 |
    Software Advisories
    Advisory ID Software Component Link
    cisco-sa-iosxe-decnet-dos-cuPWDkyL URL Logo tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-decnet-dos-cuPWDkyL
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