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Chef Manage deserializes cookie data insecurely

Vulnerability Note VU#586503

Original Release Date: 2016-05-17 | Last Revised: 2016-05-17


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


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.


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


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

Affected   Unknown   Unaffected

Chef Software

Notified:  March 29, 2016 Updated:  May 13, 2016



Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

We are not aware of further vendor information regarding this vulnerability.

CVSS Metrics

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



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: 2016-05-17
Date First Published: 2016-05-17
Date Last Updated: 2016-05-17 14:07 UTC
Document Revision: 16

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