CyberSecBulletin
CVE-2024-11621NVD status: Analyzed

Remote Desktop Manager: Improper Certificate Validation

Published Updated By the CyberSecBulletin desk

CVE-2024-11621 is a high-severity improper certificate validation vulnerability in Remote Desktop Manager from Devolutions, with a CVSS 3.1 base score of 8.8 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, but only if a user takes part, for example by opening a link or file. Affected Remote Desktop Manager versions: 2024.3.9.0 and earlier; 2024.3.2.5 and earlier; 2024.3.3.7 and earlier, and others listed below. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.23% chance of exploitation within 30 days, which is low compared with other CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Update Remote Desktop Manager Powershell to 2024.3.7 or a later version.
  2. Read the advisory on devolutions.net 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.
  4. Because the attack needs a user to take part, warn users about unexpected links and files related to this product until it is patched.

Affected products and versions

VendorProductAffected versionsFixed in
DevolutionsRemote Desktop Manager2024.3.9.0 and earlier; 2024.3.2.5 and earlier; 2024.3.3.7 and earlier; 2024.3.3.0 and earlier; 2024.3.6.0 and earlierNot stated
DevolutionsRemote Desktop Manager Powershellbefore 2024.3.72024.3.7

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
RequiredA user must take an action such as opening a file or link.
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:R/S:U/C:H/I:H/A:H. Scored by CISA (ADP).

Official description

Missing certificate validation in Devolutions Remote Desktop Manager on macOS, iOS, Android, Linux allows an attacker to intercept and modify encrypted communications via a man-in-the-middle attack. Versions affected are : Remote Desktop Manager macOS 2024.3.9.0 and earlier Remote Desktop Manager Linux 2024.3.2.5 and earlier Remote Desktop Manager Android 2024.3.3.7 and earlier Remote Desktop Manager iOS 2024.3.3.0 and earlier Remote Desktop Manager Powershell 2024.3.6.0 and earlier

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

The underlying weakness: Improper Certificate Validation

The product does not validate, or incorrectly validates, a certificate.

How developers prevent this class of flaw

  • Certificates should be carefully managed and checked to assure that data are encrypted with the intended owner's public key.
  • If certificate pinning is being used, ensure that all relevant properties of the certificate are fully validated before the certificate is pinned, including the hostname.

More Improper Certificate Validation vulnerabilities (CWE-295)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
  3. Record last changed materially (score, affected products, status or references).

References

Other vulnerabilities in Remote Desktop Manager

All Remote Desktop Manager vulnerabilities

Recent Improper Certificate Validation vulnerabilities

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