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Description
An issue in Hikvision DS-2CD1321-I V5.7.21 build 230819 allows attackers to cause a Denial of Service (DoS) via sending a crafted POST request to the endpoint /ISAPI/Security/challenge. The vendor has stated that upgrading to V5.7.23_SP2 fixes the issue.
References
crashpark.weebly.com/...nauthenticated-denial-of-service-dos
assets.hikvision.com/...mera-V5.7.23_SP2_Release_Note-E8.pdf
www.hikvision.com/en/support/download/firmware/