Cisco Advanced Malware Protection/Immunet on Windows DLL Loader uncontrolled search path

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CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.2$5k-$25k0.85

A vulnerability was found in Cisco Advanced Malware Protection and Immunet on Windows (Anti-Malware Software) (affected version unknown). It has been declared as critical. Affected by this vulnerability is an unknown function of the component DLL Loader. The manipulation with an unknown input leads to a privilege escalation vulnerability. The CWE definition for the vulnerability is CWE-427. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

A vulnerability in the dynamic link library (DLL) loading mechanism in Cisco Advanced Malware Protection (AMP) for Endpoints Windows Connector, ClamAV for Windows, and Immunet could allow an authenticated, local attacker to perform a DLL hijacking attack on an affected Windows system. To exploit this vulnerability, the attacker would need valid credentials on the system. The vulnerability is due to insufficient validation of directory search paths at run time. An attacker could exploit this vulnerability by placing a malicious DLL file on an affected system. A successful exploit could allow the attacker to execute arbitrary code with SYSTEM privileges.

The weakness was disclosed 04/08/2021 as cisco-sa-amp-imm-dll-tu79hvkO. It is possible to read the advisory at tools.cisco.com. This vulnerability is known as CVE-2021-1386 since 11/13/2020. The exploitation appears to be difficult. The attack can be launched remotely. The successful exploitation requires a single authentication. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 04/11/2021).

Upgrading eliminates this vulnerability.

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VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.2

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfoedit

Class: Privilege escalation
CWE: CWE-427
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

Price Prediction: 🔍
Current Price Estimation: 🔒

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Countermeasuresinfoedit

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Timelineinfoedit

11/13/2020 CVE assigned
04/08/2021 +145 days Advisory disclosed
04/08/2021 +0 days VulDB entry created
04/11/2021 +3 days VulDB last update

Sourcesinfoedit

Vendor: https://www.cisco.com/

Advisory: cisco-sa-amp-imm-dll-tu79hvkO
Status: Confirmed

CVE: CVE-2021-1386 (🔒)

Entryinfoedit

Created: 04/08/2021 10:34 AM
Updated: 04/11/2021 06:57 PM
Changes: (1) source_cve_cna
Complete: 🔍

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