QID 317039

Date Published: 2021-09-16

QID 317039: Cisco Internetwork Operating System (IOS) XR Software Border Gateway Protocol Resource Public Key Infrastructure Denial of Service (DoS) Vulnerability (cisco-sa-xrbgp-rpki-dos-gvmjqxbk)

A vulnerability in the implementation of the Resource Public Key Infrastructure (RPKI) feature of Cisco IOS XR Software
could allow an unauthenticated, remote attacker to cause the Border Gateway Protocol (BGP)
process to crash, resulting in a denial of service (DoS) condition.

Affected Products
Cisco devices if they were running Cisco IOS XR Software releases 4.3.0 through 7.3.0 and had RPKI configured and in use.

QID Detection Logic (Authenticated):
The check matches Cisco IOS XR version retrieved via Unix Auth using "show version" command.

A successful exploit could allow the attacker to cause a DoS condition because the BGP process could constantly restart and BGP routing could become unstable.

  • CVSS V2 rated as High - 7.5 severity.
    • Solution

    Customers are advised to refer to cisco-sa-xrbgp-rpki-dos-gvmjqxbk for more information.

    Vendor References

    CVEs related to QID 317039

    CVE-2021-1440 |
    Software Advisories
    Advisory ID Software Component Link
    cisco-sa-xrbgp-rpki-dos-gvmjqxbk URL Logo tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-xrbgp-rpki-dos-gvmjqxbk
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