QID 317124

Date Published: 2022-01-17

QID 317124: Cisco Internetwork Operating System (IOS) XE SD-WAN Software Buffer Overflow Vulnerability (cisco-sa-iosxesdwan-rbuffover-vE2OB6tp)

A vulnerability in the vDaemon process in Cisco IOS XE SD-WAN Software could allow an unauthenticated,
remote attacker to cause a buffer overflow on an affected device.

Affected Products:
Following Cisco products if they are running a vulnerable release of Cisco IOS XE SD-WAN Software and have the SD-WAN feature enabled:
1000 Series Integrated Services Routers (ISRs)
4000 Series ISRs
ASR 1000 Series Aggregation Services Routers
Cloud Services Router 1000V Series
Note: The SD-WAN feature is not enabled by default.

QID Detection Logic (Authenticated):
The check matches Cisco IOS XE SDWAN 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 a buffer overflow and possibly execute arbitrary commands with root-level privileges,
or cause the device to reload, which could result in a denial of service condition.

  • CVSS V3 rated as Critical - 9.8 severity.
  • CVSS V2 rated as Critical - 10 severity.
    • Solution

    Customers are advised to refer to cisco-sa-iosxesdwan-rbuffover-vE2OB6tp for more information.

    Vendor References

    CVEs related to QID 317124

    CVE-2021-34727 |
    Software Advisories
    Advisory ID Software Component Link
    cisco-sa-iosxesdwan-rbuffover-vE2OB6tp URL Logo tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxesdwan-rbuffover-vE2OB6tp
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