Access Restriction Bypass

Affecting system.servicemodel.duplex package, versions [4.0.0, 4.0.3), [4.3, 4.3.2), [4.4, 4.4.3), [4.5 ,4.5.2)

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Overview

Affected versions of system.servicemodel.duplex are vulnerable to Access Restriction Bypass. It does not correctly validate certificates. An attacker who successfully exploited this vulnerability could present an expired certificate when challenged.

Note: If an application does not use Windows Communication Foundation you are not affected.

Remediation

Upgrade system.servicemodel.duplex to version 4.0.3, 4.3.2, 4.4.3, 4.5.2 or higher.

References

CVSS Score

5.5
medium severity
  • Attack Vector
    Local
  • Attack Complexity
    Low
  • Privileges Required
    Low
  • User Interaction
    None
  • Scope
    Unchanged
  • Confidentiality
    None
  • Integrity
    High
  • Availability
    None
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Credit
Unknown
CVE
CVE-2018-8356
CWE
CWE-295
Snyk ID
SNYK-DOTNET-SYSTEMSERVICEMODELDUPLEX-60250
Disclosed
09 Jul, 2018
Published
11 Jul, 2018