CVE-2021-33045: Dahua IP Camera Authentication Bypass Vulnerability

CVE-2021-33045 · Severity: critical · CVSS 9.8 · Exploited in the wild · Published 2024-08-21

An authentication bypass vulnerability exists in several Dahua IP cameras and NVR products during the login process. Attackers can bypass identity authentication by constructing malicious data packets, specifically when a loopback device is specified by the client during authentication.

Vendors: Dahua.

Quick answers

Is CVE-2021-33045 exploited in the wild?
Yes. CVE-2021-33045 is known to be exploited in the wild, first recorded on 21 August 2024. Treat it as urgent.
How severe is CVE-2021-33045?
Critical severity, with a CVSS score of 9.8, published 21 August 2024.
Which products and versions are affected?
Dahua IPC-HUM7XXX Firmware before 2.820.0000000.5.r.210705; Dahua IPC-HX3XXX Firmware before 2.800.0000000.29.r.210630; Dahua IPC-HX5XXX Firmware before 2.820.0000000.5.r.210705; Dahua NVR-1XXX Firmware before 4.001.0000005.1.r.210709; and 3 more.
Is there a fix for CVE-2021-33045?
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-2021-33045 attacked?
It is attacked over the network, in a network appliance.
Am I affected by CVE-2021-33045?
Check whether you run Dahua IP Camera Firmware. 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

  • Dahua IPC-HUM7XXX Firmware before 2.820.0000000.5.r.210705
  • Dahua IPC-HX3XXX Firmware before 2.800.0000000.29.r.210630
  • Dahua IPC-HX5XXX Firmware before 2.820.0000000.5.r.210705
  • Dahua NVR-1XXX Firmware before 4.001.0000005.1.r.210709
  • Dahua NVR-2XXX Firmware before 4.001.0000000.1.r.210710
  • Dahua NVR-4XXX Firmware before 4.001.0000005.1.r.210713
  • Dahua NVR-5XXX Firmware before 4.001.0000000.0.r.210710

Timeline

  • 2021-09-30: disclosed: Initial NVD analysis and vendor advisory published
  • 2024-08-21: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
  • 2024-08-21: exploited: Confirmed exploited in the wild per CISA KEV catalog

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