{"id":"CVE-2024-20343","title":"Cisco IOS XR Software CLI Arbitrary File Read Vulnerability (CVE-2024-20343)","summary":"A vulnerability in the CLI of Cisco IOS XR Software could allow an authenticated, local attacker to read any file in the file system of the underlying Linux operating system. The attacker must have valid credentials on the affected device.…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","cvssSource":"vendor","vendor":"Cisco","product":"Cisco IOS XR Software","affected":["ios_xr_software"],"published":"2024-09-11","updated":"2024-09-11","sourceUpdated":"2024-09-11T16:00:00+00:00","source":"CSAF","sourceUrl":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-shellutil-HCb278wD","references":[{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-shellutil-HCb278wD"},{"url":"https://software.cisco.com"}],"tags":["csaf","vendor-advisory","cisco"],"epss":0.00139,"epssPercentile":0.0263,"ingestedAt":"2026-09-19T16:43:01.808Z","slug":"CVE-2024-20343","body":"## Overview\n\nA vulnerability in the CLI of Cisco IOS XR Software could allow an authenticated, local attacker to read any file in the file system of the underlying Linux operating system. The attacker must have valid credentials on the affected device.\r\n\r\nThis vulnerability is due to incorrect validation of the arguments that are passed to a specific CLI command. An attacker could exploit this vulnerability by logging in to an affected device with low-privileged credentials and using the affected command. A successful exploit could allow the attacker access files in read-only mode on the Linux file system.\r\n\r\nCisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.\r\n\r\n\r\n\r\nThis advisory is part of the September 2024 release of the Cisco IOS XR Software Security Advisory Bundled Publication. For a complete list of the advisories and links to them, see Cisco Event Response: September 2024 Semiannual Cisco IOS XR Software Security Advisory Bundled Publication [\"https://sec.cloudapps.cisco.com/security/center/viewErp.x?alertId=ERP-75416\"].\n\n## Vendor advisories\n\n- **cisco-sa-iosxr-shellutil-HCb278wD** · Cisco · affected: Cisco IOS XR Software · updated 2024-09-11 · [advisory](https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-shellutil-HCb278wD)\n\n**Cisco IOS XR Software CLI Arbitrary File Read Vulnerability**. Released 2024-09-11.\n\nAffected:\n\n- Cisco IOS XR Software\n\n## Remediation\n\nCisco has released software updates that address this vulnerability. https://software.cisco.com","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}