CVE-2021-25294

published 2021-01-18

CVE-2021-25294: OpenCATS through 0.9.5-3 unsafely deserializes index.php?m=activity requests, leading to remote code execution. This occurs because lib/DataGrid.php calls…

Priority P2 65 critical 9.8 CVSS 3.1

AV N AC L PR N UI N S U C H I H A H

OpenCATS through 0.9.5-3 unsafely deserializes index.php?m=activity requests, leading to remote code execution. This occurs because lib/DataGrid.php calls unserialize for the parametersactivity:ActivityDataGrid parameter. The PHP object injection exploit chain can leverage an __destruct magic method in guzzlehttp.

Affected

1 ranges

Vendor	Product	Version range	Fixed in
opencats	opencats	<= 0.9.5-3	—

Detection & IOCs extracted from sources · hover to see the quote

url index.php?m=activity↗

path lib/DataGrid.php↗

• → Detect deserialization abuse via the 'activity:ActivityDataGrid' POST parameter in requests to index.php?m=activity on OpenCATS installations. ↗
• → The PHP object injection exploit chain leverages the __destruct magic method in the guzzlehttp library; monitor for guzzlehttp gadget chain artifacts in deserialized payloads. ↗

• · Vulnerability affects OpenCATS through version 0.9.5-3 only; patched versions are not affected. ↗
• · Exploitation requires the guzzlehttp library to be present in the OpenCATS installation for the gadget chain to work. ↗

CVSS provenance

nvd v3.1 9.8 CRITICAL CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

nvd v2.0 10.0 CRITICAL AV:N/AC:L/Au:N/C:C/I:C/A:C

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