CVE-2023-20032 Memory corruption in Cisco Secure Endpoint
Remote attackers can execute arbitrary code or cause denial of service via crafted HFS+ files due to a heap buffer overflow in ClamAV.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-20032?
CVE-2023-20032 is a critical memory corruption vulnerability in Cisco Web Security Appliance, published on 16 Feb 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
On Feb 15, 2023, the following vulnerability in the ClamAV scanning library was disclosed: A vulnerability in the HFS+ partition file parser of ClamAV versions 1.0.0 and earlier, 0.105.1 and earlier, and 0.103.7 and earlier could allow an unauthenticated, remote attacker to execute arbitrary code. This vulnerability is due to a missing buffer size check that may result in a heap buffer overflow write. An attacker could exploit this vulnerability by submitting a crafted HFS+ partition file to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to execute arbitrary code with the privileges of the ClamAV scanning process, or else crash the process, resulting in a denial of service (DoS) condition. For a description of this vulnerability, see the ClamAV blog ["https://blog.clamav.net/"].
Which versions are affected by CVE-2023-20032?
It affects 5 products.
Products include Cisco Secure Endpoint, Cisco Secure Endpoint Private Cloud, Cisco Web Security Appliance, Clamav Clamav, Stormshield Stormshield Network Security.
How do I fix CVE-2023-20032?
Upgrade to a fixed version.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2023-20032 being exploited?
There is no known exploitation of CVE-2023-20032 in the wild and no public exploit code.
Other vulnerabilities in Cisco Web Security Appliance
- 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
- CVE-2026-20215 ClamAV 7Zip File Format Processing Out-of-Bounds Memory Corruption Vulnerability
Sources
Also known as AZL-13724, CLEANSTART-2026-RA22735, DEBIAN-CVE-2023-20032, UBUNTU-CVE-2023-20032.