Vulnerability Note VU#586503

Chef Manage deserializes cookie data insecurely

Original Release date: 17 May 2016 | Last revised: 17 May 2016

Overview

Chef Manage add-on, version 1.11.4 and earlier, deserializes cookie data insecurely, which may be leveraged to gain unauthenticated remote code execution.

Description

CWE-502: Deserialization of Untrusted Data - CVE-2016-4326

Chef with the Chef Manage (previously known as 'opscode-manage') add-on enabled deserializes user-provided cookie data without properly validating it first. An unauthenticated attacker can provide specially crafted cookie data that, when deserialized, results in the execution of arbitrary code with the web server's privileges.

Impact

A remote, unauthenticated attacker can provide specially crafted cookie data that, when deserialized, will execute arbitrary code with the privileges of the web server.

Solution

Apply an update

Releases of Chef Manage or opscode-manage since version 1.12.0 are not affected by this vulnerability. Users are encouraged to update to the latest release.

Vendor Information (Learn More)

VendorStatusDate NotifiedDate Updated
Chef SoftwareAffected29 Mar 201613 May 2016
If you are a vendor and your product is affected, let us know.

CVSS Metrics (Learn More)

Group Score Vector
Base 10.0 AV:N/AC:L/Au:N/C:C/I:C/A:C
Temporal 7.8 E:POC/RL:OF/RC:C
Environmental 5.9 CDP:ND/TD:M/CR:ND/IR:ND/AR:ND

References

Credit

Thanks to Henrik Ferdinand Nölscher of Code-White GmbH for reporting this vulnerability.

This document was written by Joel Land.

Other Information

  • CVE IDs: CVE-2016-4326
  • Date Public: 17 May 2016
  • Date First Published: 17 May 2016
  • Date Last Updated: 17 May 2016
  • Document Revision: 16

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