Summary

• Cisco released its semiannual Cisco IOS XR Software Security Advisory Bundled Publication on September 13, 2023. In direct response to customer feedback, Cisco releases bundles of Cisco IOS XR Software Security Advisories on the second Wednesday of the month in March and September of each calendar year.

  The September 13, 2023, release of the Cisco IOS XR Software Security Advisory Bundled Publication includes six Cisco Security Advisories that describe eight vulnerabilities in Cisco IOS XR Software. Cisco has released software updates that address these vulnerabilities.

Details

• The following table identifies Cisco Security content that is associated with this bundled publication:

  Cisco Security Advisory	CVE ID	Security Impact Rating	CVSS Base Score
  Cisco IOS XR Software iPXE Boot Signature Bypass Vulnerability	CVE-2023-20236	Medium	6.7
  Cisco IOS XR Software Access Control List Bypass Vulnerability	CVE-2023-20191	Medium	5.8
  Cisco IOS XR Software Compression ACL Bypass Vulnerability	CVE-2023-20190	Medium	5.8
  Cisco IOS XR Software Image Verification Vulnerability	CVE-2023-20135	Medium	5.7
  Cisco IOS XR Software Connectivity Fault Management Denial of Service Vulnerability	CVE-2023-20233	Medium	4.3
  Cisco IOS XR Software Model-Driven Programmability Behavior with AAA Authorization	—	Informational	—

   

  Related Resources

  Cisco Security Vulnerability Policy
  MITRE Common Vulnerabilities and Exposures
  Common Vulnerability Scoring System and the Security Impact Rating
  Common Vulnerability Scoring System Q & A