{"id":"CVE-2023-20040","aliases":["EUVD-2023-24219","GHSA-v96g-9h62-76pj"],"status":"published","title":"A vulnerability in the NETCONF service of Cisco Network Services Orchestrator (NSO) could allow...","description":"A vulnerability in the NETCONF service of Cisco Network Services Orchestrator (NSO) could allow an authenticated, remote attacker to cause a denial of service (DoS) on an affected system that is running as the root user. To exploit this vulnerability, the attacker must be a member of the admin group.\r\n\r This vulnerability exists because user-supplied input is not properly validated when NETCONF is used to upload packages to an affected device. An attacker could exploit this vulnerability by uploading a specially crafted package file. A successful exploit could allow the attacker to write crafted files to arbitrary locations on the filesystem or delete arbitrary files from the filesystem of an affected device, resulting in a DoS condition. \r\n\r Note: By default, during install, Cisco NSO will be set up to run as the root user unless the --run-as-user option is used.","severity":{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:H","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.01276,"percentile":0.70152,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-23","CWE-434"],"published":"2023-01-19T01:37:34Z","modified":"2026-06-17T05:29:20Z","products":[{"vendor":"cisco","product":"cisco network services orchestrator"},{"vendor":"cisco","product":"network_services_orchestrator"}],"references":[{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nso-path-trvsl-zjBeMkZg","tags":["x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-20040"},{"url":"https://github.com/advisories/GHSA-v96g-9h62-76pj"}],"sources":{"cve":[{"id":"CVE-2023-20040","description":"A vulnerability in the NETCONF service of Cisco Network Services Orchestrator (NSO) could allow an authenticated, remote attacker to cause a denial of service (DoS) on an affected system that is running as the root user. To exploit this vulnerability, the attacker must be a member of the admin group.\r\n\r This vulnerability exists because user-supplied input is not properly validated when NETCONF is used to upload packages to an affected device. An attacker could exploit this vulnerability by uploading a specially crafted package file. A successful exploit could allow the attacker to write crafted files to arbitrary locations on the filesystem or delete arbitrary files from the filesystem of an affected device, resulting in a DoS condition. \r\n\r Note: By default, during install, Cisco NSO will be set up to run as the root user unless the --run-as-user option is used.","status":"published","published":"2023-01-19T01:37:34.592Z","modified":"2024-08-02T08:57:35.576Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:H","level":"medium","assessor":"cna"}],"cwes":["CWE-23"],"updated_at":"2026-11-02T14:35:13.368958Z"}],"euvd":[{"id":"EUVD-2023-24219","description":"A vulnerability in the NETCONF service of Cisco Network Services Orchestrator (NSO) could allow an authenticated, remote attacker to cause a denial of service (DoS) on an affected system that is running as the root user. To exploit this vulnerability, the attacker must be a member of the admin group.\r\n\r This vulnerability exists because user-supplied input is not properly validated when NETCONF is used to upload packages to an affected device. An attacker could exploit this vulnerability by uploading a specially crafted package file. A successful exploit could allow the attacker to write crafted files to arbitrary locations on the filesystem or delete arbitrary files from the filesystem of an affected device, resulting in a DoS condition. \r\n\r Note: By default, during install, Cisco NSO will be set up to run as the root user unless the --run-as-user option is used.","status":"published","published":"2023-01-19T01:37:34Z","modified":"2024-08-02T08:57:35Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:H","level":"medium"}],"updated_at":"2026-11-03T03:50:09.688494Z"}],"ghsa":[{"id":"GHSA-v96g-9h62-76pj","title":"A vulnerability in the NETCONF service of Cisco Network Services Orchestrator (NSO) could allow...","description":"A vulnerability in the NETCONF service of Cisco Network Services Orchestrator (NSO) could allow an authenticated, remote attacker to cause a denial of service (DoS) on an affected system that is running as the root user. To exploit this vulnerability, the attacker must be a member of the admin group. This vulnerability exists because user-supplied input is not properly validated when NETCONF is used to upload packages to an affected device. An attacker could exploit this vulnerability by uploading a specially crafted package file. A successful exploit could allow the attacker to write crafted files to arbitrary locations on the filesystem or delete arbitrary files from the filesystem of an affected device, resulting in a DoS condition. Note: By default, during install, Cisco NSO will be set up to run as the root user unless the --run-as-user option is used.","status":"published","published":"2023-01-20T09:30:31Z","modified":"2024-02-03T05:06:52Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:H","level":"medium"}],"cwes":["CWE-23","CWE-434"],"updated_at":"2026-11-02T14:55:33.051804Z"}],"nvd":[{"id":"CVE-2023-20040","description":"A vulnerability in the NETCONF service of Cisco Network Services Orchestrator (NSO) could allow an authenticated, remote attacker to cause a denial of service (DoS) on an affected system that is running as the root user. To exploit this vulnerability, the attacker must be a member of the admin group.\r\n\r This vulnerability exists because user-supplied input is not properly validated when NETCONF is used to upload packages to an affected device. An attacker could exploit this vulnerability by uploading a specially crafted package file. A successful exploit could allow the attacker to write crafted files to arbitrary locations on the filesystem or delete arbitrary files from the filesystem of an affected device, resulting in a DoS condition. \r\n\r Note: By default, during install, Cisco NSO will be set up to run as the root user unless the --run-as-user option is used.","status":"published","published":"2023-01-20T07:15:15.793Z","modified":"2026-06-17T05:29:20.46Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:H","level":"medium","assessor":"secondary"},{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:H","level":"medium","assessor":"primary"}],"cwes":["CWE-23","CWE-434"],"updated_at":"2026-11-02T14:07:45.305824Z"}]}}