dbcve.org
Improper Certificate ValidationWeakness · CWE-295

CVE-2025-0500

HIGH · 7.5 CVSS v3.1 Published 2025-01-15
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
82/100
Remediation priority · High
Remotely reachable No privileges

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
An issue in the native clients for Amazon WorkSpaces (when running Amazon DCV protocol), Amazon AppStream 2.0, and Amazon DCV Clients may allow an attacker to access remote sessions via man-in-the-middle.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · moderate confidence

A man-in-the-middle vulnerability in Amazon WorkSpaces (DCV protocol), Amazon AppStream 2.0, and Amazon DCV native clients allows attackers to intercept and gain unauthorized access to remote desktop sessions by exploiting insufficient authentication or session validation in the DCV protocol implementation.

MitigationUpdate all affected Amazon DCV clients to the latest patched version. Additionally, enforce TLS encryption and use trusted networks or VPNs to reduce man-in-the-middle attack surface until updates are applied.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
High
Privileges
None
User interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify installed Amazon DCV-based clients
    Check installed programs for Amazon WorkSpaces client, Amazon AppStream 2.0 client, or Amazon DCV client. On Windows, review installed applications in Control Panel or check %ProgramFiles% for Amazon DCV folders. On Linux, run 'rpm -qa | grep -i amazon' or 'dpkg -l | grep -i amazon'. On macOS, check /Applications for Amazon DCV apps.
    Affected if Any of these three Amazon client applications are installed and connecting via DCV protocol
  2. Determine DCV client version
    For Amazon WorkSpaces: Open client, go to Help > About. For AppStream 2.0: Open client, click username > About. For Amazon DCV: Run 'dcv --version' from command line or check the installed package version.
    Affected if Version is older than the patched release for CVE-2025-0500 (compare against vendor release notes)
  3. Verify DCV protocol is in use
    Check active connections or recent connection history. Review any saved connection configurations (.dcv files) or connection logs in user directories (typically ~/DCV/ConnectionStore or similar).
    Affected if Connections are established using the DCV protocol rather than other remote desktop protocols
  4. Inspect TLS/encryption configuration
    Check DCV connection settings for encryption enforcement. Look for 'tls-mode' or 'encryption' settings in client configuration files (typically in ~/.dcv/ or system-wide DCV config). Verify whether connections allow non-TLS or weak encryption modes.
    Affected if TLS encryption is not enforced or is set to optional/disabled for DCV sessions
  5. Review network configuration for DCV traffic
    Check if DCV traffic traverses untrusted networks. Review VPN usage policies and verify whether DCV clients are configured to only connect within trusted network boundaries.
    Affected if DCV clients can connect over public or untrusted networks without VPN protection

User is affected if running any Amazon WorkSpaces, AppStream 2.0, or DCV client connecting via DCV protocol with an unpatched version or without enforced TLS encryption.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

From vendor data
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Update all affected Amazon DCV clients to the latest patched version. Additionally, enforce TLS encryption and use trusted networks or VPNs to reduce man-in-the-middle attack surface until updates are applied.

Have this fixed Scoped from the published advisory
  • Consultation4.0 h
  • Implementation8.0 h
  • Testing4.0 h
  • Review / QA2.0 h
18.0 hours of engineering $3,200
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2025-0500 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data