CVE-2023-20197 Denial of service in Cisco Secure Endpoint
An unauthenticated remote attacker can cause a denial of service in ClamAV by submitting a crafted HFS+ filesystem image that triggers an infinite loop during decompression.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-20197?
CVE-2023-20197 is a high-severity denial of service vulnerability in Fedoraproject Fedora, published on 16 Aug 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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. For a description of this vulnerability, see the ClamAV blog .
Weakness: CWE-835
Which versions are affected by CVE-2023-20197?
It affects 3 products.
Linux distribution packages (21)
clamav SUSE:Enterprise Storage 7 | All versions | 0.103.9-150000.3.47.1 |
clamav SUSE:Enterprise Storage 7.1 | All versions | 0.103.9-150000.3.47.1 |
clamav SUSE:Linux Enterprise High Performance Computing 15 SP1-LTSS | All versions | 0.103.9-150000.3.47.1 |
clamav SUSE:Linux Enterprise High Performance Computing 15 SP2-LTSS | All versions | 0.103.9-150000.3.47.1 |
clamav SUSE:Linux Enterprise High Performance Computing 15 SP3-ESPOS | All versions | 0.103.9-150000.3.47.1 |
clamav SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSS | All versions | 0.103.9-150000.3.47.1 |
clamav SUSE:Linux Enterprise Module for Basesystem 15 SP4 | All versions | 0.103.9-150000.3.47.1 |
clamav SUSE:Linux Enterprise Module for Basesystem 15 SP5 | All versions | 0.103.9-150000.3.47.1 |
clamav SUSE:Linux Enterprise Server 12 SP5 | All versions | 0.103.9-3.27.1 |
clamav SUSE:Linux Enterprise Server 15 SP1-LTSS | All versions | 0.103.9-150000.3.47.1 |
clamav SUSE:Linux Enterprise Server 15 SP2-LTSS | All versions | 0.103.9-150000.3.47.1 |
clamav SUSE:Linux Enterprise Server 15 SP3-LTSS | All versions | 0.103.9-150000.3.47.1 |
clamav SUSE:Linux Enterprise Server for SAP Applications 12 SP5 | All versions | 0.103.9-3.27.1 |
clamav SUSE:Linux Enterprise Server for SAP Applications 15 SP1 | All versions | 0.103.9-150000.3.47.1 |
clamav SUSE:Linux Enterprise Server for SAP Applications 15 SP2 | All versions | 0.103.9-150000.3.47.1 |
clamav SUSE:Linux Enterprise Server for SAP Applications 15 SP3 | All versions | 0.103.9-150000.3.47.1 |
clamav SUSE:Manager Proxy 4.2 | All versions | 0.103.9-150000.3.47.1 |
clamav SUSE:Manager Server 4.2 | All versions | 0.103.9-150000.3.47.1 |
clamav openSUSE:Leap 15.4 | All versions | 0.103.9-150000.3.47.1 |
clamav openSUSE:Leap 15.5 | All versions | 0.103.9-150000.3.47.1 |
clamav openSUSE:Tumbleweed | All versions | 0.103.9-1.1 |
Products include Cisco Secure Endpoint, Cisco Secure Endpoint Private Cloud, Fedoraproject Fedora.
How do I fix CVE-2023-20197?
Upgrade to a fixed version.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2023-20197 being exploited?
There is no known exploitation of CVE-2023-20197 in the wild and no public exploit code.
Other vulnerabilities in Fedoraproject Fedora
- CVE-2023-20032 Memory corruption in Cisco Secure Endpoint
- CVE-2022-20770 ClamAV CHM File Parsing Denial of Service Vulnerability Affecting Cisco Products: April 2022
- CVE-2026-20348 ClamAV XAR File Format Processing Memory Corruption Vulnerability
- CVE-2026-20213 ClamAV PE File Format Processing Out-of-Bounds Memory Corruption Vulnerability
- CVE-2026-20214 ClamAV FSG File Format Processing Out-of-Bounds Memory Corruption Vulnerability
Sources
Also known as CLEANSTART-2026-MF37680, DEBIAN-CVE-2023-20197, DLA-3544-1, GHSA-r7mw-p665-4533, OESA-2023-1540, OESA-2023-1557 and 9 more.