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Known exploited vulnerability

CVE-2020-3433

highCVSS 3.1 7.8In CISA KEVRansomwareEPSS 10%Published · Cisco

The short answer

CVE-2020-3433 affects Cisco Cisco AnyConnect Secure Mobility Client and is rated high (CVSS 7.8). CISA added it to the Known Exploited Vulnerabilities catalog on 2022-10-24: attackers are using it, so patch it first.

What it is

A vulnerability in the interprocess communication (IPC) channel of Cisco AnyConnect Secure Mobility Client for Windows could allow an authenticated, local attacker to perform a DLL hijacking attack. To exploit this vulnerability, the attacker would need to have valid credentials on the Windows system. The vulnerability is due to insufficient validation of resources that are loaded by the application at run time. An attacker could exploit this vulnerability by sending a crafted IPC message to the AnyConnect process. A successful exploit could allow the attacker to execute arbitrary code on the affected machine with SYSTEM privileges. To exploit this vulnerability, the attacker would need to have valid credentials on the Windows system.

Weakness: CWE-427.

Severity

7.8 high

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

Exploited (CISA KEV)

Yes, since Oct 24, 2022

Federal due date Nov 14, 2022

EPSS, next 30 days

10%

Higher than 96% of scored CVEs

How it can be exploited

Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

What CISA says to do

Apply updates per vendor instructions.

Affected products

Cisco AnyConnect Secure Mobility Client. NVD's record lists the exact affected versions.

References

Questions

Is CVE-2020-3433 being exploited?

Yes. CISA added CVE-2020-3433 to its Known Exploited Vulnerabilities catalog on 2022-10-24, with a federal remediation due date of 2022-11-14. CISA lists it as used in ransomware campaigns.

How do I fix CVE-2020-3433?

CISA's required action: Apply updates per vendor instructions.

From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.

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