CVE-2025-20128

A vulnerability in the Object Linking and Embedding 2 (OLE2) decryption routine 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 integer underflow in a bounds check that allows for a heap buffer overflow read. An attacker could exploit this vulnerability by submitting a crafted file containing OLE2 content to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to terminate the ClamAV scanning process, resulting in a DoS condition on the affected software. For a description of this vulnerability, see the . Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

Database specific

{
    "unresolved_ranges": [
        {
            "extracted_events": [
                {
                    "fixed": "1.24.4"
                },
                {
                    "fixed": "1.25.1"
                },
                {
                    "fixed": "7.5.20"
                },
                {
                    "introduced": "8.0.1.21160"
                },
                {
                    "fixed": "8.4.3"
                }
            ],
            "source": "CPE_RANGE",
            "cpes": [
                "cpe:2.3:a:cisco:secure_endpoint:*:*:*:*:*:linux:*:*",
                "cpe:2.3:a:cisco:secure_endpoint:*:*:*:*:*:macos:*:*",
                "cpe:2.3:a:cisco:secure_endpoint:*:*:*:*:*:windows:*:*"
            ],
            "vendor_product": "cisco:secure_endpoint"
        },
        {
            "extracted_events": [
                {
                    "fixed": "4.2.0"
                }
            ],
            "source": "CPE_RANGE",
            "cpes": [
                "cpe:2.3:a:cisco:secure_endpoint_private_cloud:*:*:*:*:*:*:*:*"
            ],
            "vendor_product": "cisco:secure_endpoint_private_cloud"
        }
    ]
}

References

Affected packages

Git / github.com/cisco-talos/clamav

Affected ranges

Type

GIT

Repo

https://github.com/cisco-talos/clamav

Events

Introduced

09f373f82ad0978e267cc9b795aa93d7f8e8b7d2

Fixed

9a2c6425ad4c5a2a38bf641c8e4631243805dcd1

Introduced

2a21451e1f3585ac99cd15c3c06371fa478dfad1

Fixed

98882f5f019ded3b96bacc17a9d1d65fb96dd686

Database specific

{
    "cpe": "cpe:2.3:a:clamav:clamav:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "1.0.0"
        },
        {
            "fixed": "1.0.8"
        },
        {
            "introduced": "1.1.0"
        },
        {
            "fixed": "1.4.2"
        }
    ],
    "source": "CPE_RANGE"
}

Affected versions

clamav-1.*

clamav-1.0.0

clamav-1.0.1

clamav-1.0.2

clamav-1.0.3

clamav-1.0.4

clamav-1.0.5

clamav-1.0.6

clamav-1.0.7

clamav-1.1.0

clamav-1.2.0

clamav-1.2.0-rc

clamav-1.3.0

clamav-1.3.0-rc

clamav-1.3.0-rc2

clamav-1.4.0

clamav-1.4.0-rc

clamav-1.4.1

Database specific

source

"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-20128.json"