CVE-2021-47796 Denver CVE debrief

Who should care

Defenders responsible for the security of Denver SHO-110 IP cameras, particularly those exposed to untrusted networks, should assess the potential for unauthorized snapshot access and take measures to restrict access to the '/snapshot' endpoint. This includes verifying the existence of Denver SHO-110 IP cameras in their environment, assessing the potential impact on the confidentiality of the monitored environment, and implementing measures to prevent or  

Why it matters

CVE-2021-47796 allows remote attackers to access image snapshots from Denver SHO-110 IP cameras without authentication, potentially compromising the confidentiality of the monitored environment. Defenders should verify exposure and assess potential for unauthorized snapshot access.

• Potential unauthorized access to sensitive visual information
• Possible reconstruction of camera streams
• Compromise of monitored environment confidentiality

Technical summary

The Denver SHO-110 IP Camera exposes a secondary HTTP service on TCP port 8001 with a '/snapshot' endpoint that allows unauthenticated access to image snapshots, potentially compromising the confidentiality of the monitored environment. This vulnerability allows remote attackers to access image snapshots without authentication, which could lead to unauthorized access to sensitive visual information and possible reconstruction of camera streams. Defenders should prioritize verifying exposure of Denver SHO-110 IP cameras to untrusted networks and assessing the potential for unauthorized snapshot access.

Defensive priority

Defenders should prioritize verifying exposure of Denver SHO-110 IP cameras to untrusted networks and assessing the potential for unauthorized snapshot access.

Recommended defensive actions

• Verify exposure of Denver SHO-110 IP cameras to untrusted networks
• Assess potential for unauthorized snapshot access
• Restrict access to the '/snapshot' endpoint on TCP port 8001
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and source item provide details on the vulnerability, including the affected product, Denver SHO-110 IP Camera, and the exposed '/snapshot' endpoint on TCP port 8001. The source item provides additional context on the vulnerability, including its potential impact on the confidentiality of the monitored environment. Defenders should verify the existence of Denver SHO-110 IP cameras in their environment, particularly those exposed to untrusted networks, and assess the potential for unauthorized snapshot access.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.