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 updateReleases 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 UpdatedChef SoftwareAffected29 Mar 201613 May 2016If 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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