CVE-2020-3433: Cisco AnyConnect Secure Mobility Client for Windows DLL Hijacking Vulnerability

CVE-2020-3433 · Severity: critical · CVSS 7.8 · Exploited in the wild · Published 2022-10-24

A DLL hijacking vulnerability in the interprocess communication (IPC) channel of Cisco AnyConnect Secure Mobility Client for Windows allows an authenticated local attacker to execute arbitrary code with SYSTEM privileges. The flaw exists due to insufficient validation of resources loaded at runtime, which can be triggered by sending a crafted IPC message.

Vendors: Cisco.

Quick answers

Is CVE-2020-3433 exploited in the wild?
Yes. CVE-2020-3433 is known to be exploited in the wild, first recorded on 24 October 2022. Treat it as urgent.
How severe is CVE-2020-3433?
Critical severity, with a CVSS score of 7.8, published 24 October 2022.
Which products and versions are affected?
Cisco AnyConnect Secure Mobility Client < 4.9.00086.
Is there a fix for CVE-2020-3433?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2020-3433 attacked?
It is attacked with local access, in a network appliance.
Am I affected by CVE-2020-3433?
Check whether you run Cisco AnyConnect Secure. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Affected products

  • Cisco AnyConnect Secure Mobility Client < 4.9.00086

Timeline

  • 2020-08-17: disclosed: Initial disclosure by Cisco
  • 2022-10-24: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
  • 2022-10-24: other: NVD publication date

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