CVE-2023-20032 [Critical] | Denial of Service in Secure Endpoint

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/"].

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-04-10	7.31%	7.12%	-0.18%
2	2026-03-27	7.12%	7.31%	+0.18%
3	2026-03-23	—	7.12%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-04-10

7.31%

7.12%

-0.18%

2026-03-27

7.12%

7.31%

+0.18%

2026-03-23

—

7.12%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
9.8	3.1	CRITICAL	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H` Click to expand Attack vector (AV:N) Could be attacked over the internet or any normal routed network—not just someone sitting at the machine. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:N) No account or special rights needed—anonymous or random user is enough. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:H) Serious risk that confidential data gets exposed in a big way. Integrity (I:H) They could widely tamper with or forge data—trust in the data is badly hurt. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	3.9	5.9	[email protected]
9.8	3.1	CRITICAL	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H` Click to expand Attack vector (AV:N) Could be attacked over the internet or any normal routed network—not just someone sitting at the machine. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:N) No account or special rights needed—anonymous or random user is enough. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:H) Serious risk that confidential data gets exposed in a big way. Integrity (I:H) They could widely tamper with or forge data—trust in the data is badly hurt. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	3.9	5.9	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

9.8

3.1

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand

Attack vector (AV:N): Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L): Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N): No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N): Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U): Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H): Serious risk that confidential data gets exposed in a big way.
Integrity (I:H): They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H): Could take the service down hard or make it unusable for people who depend on it.

3.9

5.9

[email protected]

9.8

3.1

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand

Attack vector (AV:N): Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L): Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N): No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N): Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U): Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H): Serious risk that confidential data gets exposed in a big way.
Integrity (I:H): They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H): Could take the service down hard or make it unusable for people who depend on it.

3.9

5.9

[email protected]

OS Trackers for CVE-2023-20032

vendor	priority	summary	link
`alpine`	—	CVE-2023-20032: 1 source package rows (clamav); 7 state rows across 7 repos (3.17-community, 3.18-community, 3.19-community, 3.20-community, 3.21-community, 3.22-community, edge-community); fixed 7, open 0.	https://security.alpinelinux.org/vuln/CVE-2023-20032
`debian`	not yet assigned	CVE-2023-20032 not yet assigned priority: Debian including 1 source packages (clamav), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5.	https://security-tracker.debian.org/tracker/CVE-2023-20032
`gentoo`	normal	CVE-2023-20032: 1 GLSA(s) (202310-01), 1 atom(s) (app-antivirus/clamav); latest impact normal.	https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2023-20032
`suse`	critical	CVE-2023-20032 severity critical: SUSE including 32 source package names (clamav-0.103.11-150600.16.7, clamav-0.103.8-0.20.53.1, …), 122 product×package rows across 38 product lines (Image SLES12-SP5-SAP-Azure-LI-BYOS-Production, Image SLES12-SP5-SAP-Azure-VLI-BYOS-Production, … (38 product lines)): Fixed 122.	https://www.suse.com/security/cve/CVE-2023-20032/
`ubuntu`	medium	CVE-2023-20032 medium priority: Ubuntu including 1 source packages (clamav), 8 status rows across 8 suites (bionic, focal, jammy, kinetic, lunar, trusty, upstream, xenial): released 7, needs-triage 1.	https://ubuntu.com/security/CVE-2023-20032

Affected software / configurations for CVE-2023-20032

Vendor	Product	Version	Raw CPE
cisco	secure_endpoint	< 1.20.2	cpe:2.3:a:cisco:secure_endpoint::::::linux::*
cisco	secure_endpoint	< 1.21.1	cpe:2.3:a:cisco:secure_endpoint::::::macos::*
cisco	secure_endpoint	< 7.5.9	cpe:2.3:a:cisco:secure_endpoint::::::windows::*
cisco	secure_endpoint	>= 8.0.1.21160, < 8.1.5	cpe:2.3:a:cisco:secure_endpoint::::::windows::*
cisco	secure_endpoint_private_cloud	< 3.6.0	cpe:2.3:a:cisco:secure_endpoint_private_cloud::::::::
cisco	web_security_appliance	< 12.5.6	cpe:2.3:a:cisco:web_security_appliance::::::::
cisco	web_security_appliance	>= 14.0.0, < 14.0.4-005	cpe:2.3:a:cisco:web_security_appliance::::::::
cisco	web_security_appliance	>= 14.5.0, < 14.5.1-013	cpe:2.3:a:cisco:web_security_appliance::::::::
cisco	web_security_appliance	>= 15.0.0, < 15.0.0-254	cpe:2.3:a:cisco:web_security_appliance::::::::
clamav	clamav	<= 0.103.7	cpe:2.3:a:clamav:clamav::::::::
clamav	clamav	>= 0.104.0, <= 0.105.1	cpe:2.3:a:clamav:clamav::::::::
clamav	clamav	1.0.0	cpe:2.3:a:clamav:clamav:1.0.0:-::::::
clamav	clamav	1.0.0	cpe:2.3:a:clamav:clamav:1.0.0:rc::::::
clamav	clamav	1.0.0	cpe:2.3:a:clamav:clamav:1.0.0:rc2::::::
stormshield	stormshield_network_security	>= 3.0.0, < 3.7.35	cpe:2.3:a:stormshield:stormshield_network_security::::::::
stormshield	stormshield_network_security	>= 3.8.0, < 3.11.23	cpe:2.3:a:stormshield:stormshield_network_security::::::::
stormshield	stormshield_network_security	>= 4.3.0, < 4.3.17	cpe:2.3:a:stormshield:stormshield_network_security::::::::
stormshield	stormshield_network_security	>= 4.4.0, < 4.6.4	cpe:2.3:a:stormshield:stormshield_network_security::::::::

References for CVE-2023-20032

URL	Tags
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-clamav-q8DThCy	Vendor Advisory

URL

CVE-2023-20032

Exploit prediction scoring system (EPSS) score for CVE-2023-20032

Common vulnerability scoring system (CVSS) metrics for CVE-2023-20032

Weakness enumeration for CVE-2023-20032

OS Trackers for CVE-2023-20032

Affected software / configurations for CVE-2023-20032

References for CVE-2023-20032