ClamAV HFS+ File Scanning Infinite Loop Denial of Service Vulnerability [CVE-2023-20197]
CVE number = CVE-2023-20197
A vulnerability in the filesystem image parser for Hierarchical File System Plus (HFS+) of ClamAV could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.
This vulnerability is due to an incorrect check for completion when a file is decompressed, which may result in a loop condition that could cause the affected software to stop responding. An attacker could exploit this vulnerability by submitting a crafted HFS+ filesystem image to be scanned by ClamAV on an affected device.
A successful exploit could allow the attacker to cause the ClamAV scanning process to stop responding, resulting in a DoS condition on the affected software and consuming available system resources.
The following table lists Cisco products that are affected by the vulnerability that is described in this advisory. Customers should refer to the associated Cisco bug IDs for further details.
| Affected Cisco Software Platform | CVSS Base Score | Security Impact Rating | Cisco Bug ID | First Fixed Release |
|---|---|---|---|---|
| Secure Endpoint Connector for Linux | 5.3 | Medium | CSCwf39307 | 1.20.5.955 1.22.0 |
| Secure Endpoint Connector for MacOS | 5.3 | Medium | CSCwf39308 | 1.22.0 |
| Secure Endpoint Connector for Windows | 7.5 | High | CSCwf39309 | 7.5.13.21586 8.1.7.21585 |
| Secure Endpoint Private Cloud | 7.5 | High | CSCwf39310 | 3.8.0 or later with updated connectors |
Cisco products may be impacted differently depending on implementation and usage of ClamAV.
For a full description of this vulnerability, please visit the ClamAV blog.
Kerry is a Content Creator at www.systemtek.co.uk she has spent many years working in IT support, her main interests are computing, networking and AI.