CVE-2023-20040: Malicious File Upload
First published: Thu Jan 19 2023(Updated: )
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.
Credit: ykramarz@cisco.com ykramarz@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco Network Services Orchestrator | >=3.3<5.4.7 | |
| Cisco Network Services Orchestrator | >=5.5<5.5.6 | |
| Cisco Network Services Orchestrator | >=5.6<5.6.7 | |
| Cisco Network Services Orchestrator | >=5.7<5.7.4 | |
| Cisco Network Services Orchestrator | =5.8 |
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Reference Links
Frequently Asked Questions
What is CVE-2023-20040?
CVE-2023-20040 is a vulnerability in the NETCONF service of Cisco Network Services Orchestrator (NSO) that could allow an authenticated, remote attacker to cause a denial of service (DoS) on an affected system.
What is the severity of CVE-2023-20040?
The severity of CVE-2023-20040 is medium with a severity value of 5.5.
How does CVE-2023-20040 impact Cisco Network Services Orchestrator?
CVE-2023-20040 could allow an attacker to cause a denial of service (DoS) on an affected Cisco Network Services Orchestrator system that is running as the root user.
How can CVE-2023-20040 be exploited?
To exploit CVE-2023-20040, the attacker must be a member of the admin group and have authenticated access to the affected system's NETCONF service.
How can I fix CVE-2023-20040?
Cisco has released software updates to address CVE-2023-20040. Please refer to the Cisco Security Advisory linked in the references for more information on specific updates.
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