CyberSecBulletin
CVE-2022-35733NVD status: Modified

UNIMO Technology digital video recorders…: Missing Authentication for Critical Functionality

Published Updated By the CyberSecBulletin desk

CVE-2022-35733 is a critical-severity missing authentication for critical functionality vulnerability in UNIMO Technology digital video recorders UDR-JA1004/JA1008/JA1016 and UDR-JA1016 from UNIMO Technology, with a CVSS 3.1 base score of 9.8 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. There is no confirmed exploitation so far. EPSS estimates a 1.79% chance of exploitation within 30 days, higher than 79% of scored CVEs.

Patch this week

Critical severity: a successful attack would have severe impact.

What to do

  1. Check which version of UNIMO Technology digital video recorders UDR-JA1004/JA1008/JA1016 and UDR-JA1016 you run against the affected versions below, and install the vendor's latest release.
  2. Read the advisory on unimo.co.jp for workarounds and exact fixed builds.
  3. Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.

Affected products and versions

VendorProductAffected versionsFixed in
UNIMO TechnologyUNIMO Technology digital video recorders UDR-JA1004/JA1008/JA1016 and UDR-JA1016Not specified in the recordNot stated
UnimoUdr-ja1004 Firmware1.0.20.13 and earlierNot stated
UnimoUdr-ja1008 Firmware1.0.20.13 and earlierNot stated
UnimoUdr-ja1016 Firmware2.0.20.13 and earlierNot stated

Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.

How the severity score breaks down

Attack vector
NetworkCan be exploited remotely over a network, including the internet.
Attack complexity
LowNo special conditions are needed; the attack works reliably.
Privileges required
NoneNo account or login is needed.
User interaction
NoneNo action by a victim is required.
Scope
UnchangedImpact stays within the vulnerable component.
Confidentiality
HighAll data handled by the component can be read.
Integrity
HighData or code can be modified at will.
Availability
HighThe component can be taken down completely.

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. Scored by NVD.

Official description

Missing authentication for critical function vulnerability in UNIMO Technology digital video recorders (UDR-JA1004/JA1008/JA1016 firmware versions v1.0.20.13 and earlier, and UDR-JA1016 firmware versions v2.0.20.13 and earlier) allows a remote unauthenticated attacker to execute an arbitrary OS command by sending a specially crafted request to the affected device web interface.

Source: the CVE record as published by its numbering authority, via NVD and CVE.org.

The underlying weakness: Missing Authentication for Critical Functionality

The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.

How developers prevent this class of flaw

  • For any security checks that are performed on the client side, ensure that these checks are duplicated on the server side, in order to avoid CWE-602. Attackers can bypass the client-side checks by modifying values after the checks have been performed, or by changing the client to remove the client-side checks entirely. Then, these modified values would be submitted to the server.
  • Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid. For example, consider using libraries with authentication capabilities such as OpenSSL or the ESAPI Authenticator.
  • When storing data in the cloud (e.g., S3 buckets, Azure blobs, Google Cloud Storage, etc.), use the provider's controls to require strong authentication for users who should be allowed to access the data.

More Missing Authentication for Critical Functionality vulnerabilities (CWE-306)

Timeline

  1. CVE record published.
  2. Record last changed materially (score, affected products, status or references).

References

Third-party and government advisories

Recent Missing Authentication for Critical Functionality vulnerabilities

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