QID 317263

Date Published: 2022-11-14

QID 317263: Cisco Internetwork Operating System (IOS) XE Switches Bypass Configured First-hop Security (FHS) Vulnerability (cisco-sa-VU855201-J3z8CKTX)

Exploitation of these vulnerabilities could allow an adjacent attacker to bypass configured first-hop security (FHS) features on the affected Cisco products.

Affected Releases

17.6.2

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.

Exploitation of these vulnerabilities could allow an adjacent attacker to bypass configured first-hop security (FHS) features on the affected Cisco products.

  • CVSS V3 rated as Medium - 4.7 severity.
  • CVSS V2 rated as High - 7.5 severity.
    • Solution

    Customers are advised to refer to cisco-sa-VU855201-J3z8CKTX for more information.

    Vendor References

    CVEs related to QID 317263

    CVE-2021-27853 |
    Software Advisories
    Advisory ID Software Component Link
    cisco-sa-VU855201-J3z8CKTX URL Logo www.cisco.com/c/en/us/support/docs/csa/cisco-sa-VU855201-J3z8CKTX.html#vp
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