Actively exploited · Published Sep 15, 2021 · Assigned by dahua
CVE-2021-33045
Critical 9.8 Exploited
In plain English
A critical-severity improper authentication in Some Dahua IP Camera, Video Intercom, NVR, XVR devices. Attackers are actively exploiting it in the wild (listed by CISA on August 21, 2024). The chance it is exploited in the next 30 days is estimated at 99.6% (higher than 99.9% of all known vulnerabilities). Ready-made attack tooling exists: Nuclei, public proof-of-concept code. Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
CISA guidance
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Federal agencies must remediate by Sep 11, 2024.
Official description
The identity authentication bypass vulnerability found in some Dahua products during the login process. Attackers can bypass device identity authentication by constructing malicious data packets.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| n/a | Some Dahua IP Camera, Video Intercom, NVR, XVR devices | Dahua IP Camera devices IPC-HX3XXX, IPC-HX5XXX, and IPC-HUM7XXX Buildtime before May, 2020, Video Intercom devices VTO75X95X, VTO65XXX, and VTH542XH, NVR devices NVR1XXX, NVR2XXX, NVR5XXX, and NVR6XX, XVR devices XVR4xxx, XVR5xxx, and XVR7xxx Buildtime before December, 2019. |
Weakness: CWE-287 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
References
- https://www.dahuasecurity.com/support/cybersecurity/details/957 x_refsource_MISC
- 20211005 [Update]: Dahua Authentication bypass (CVE-2021-33044, CVE-2021-33045) mailing-list, x_refsource_FULLDISC
- http://packetstormsecurity.com/files/164423/Dahua-Authentication-Bypass.html x_refsource_MISC
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-33045 government-resource