CVE-2016-4028

N/A

Description

An issue was discovered in Open-Xchange OX Guard before 2.4.0-rev8. OX Guard uses an authentication token to identify and transfer guest users' credentials. The OX Guard API acts as a padding oracle by responding with different error codes depending on whether the provided token matches the encryption padding. In combination with AES-CBC, this allows attackers to guess the correct padding. Attackers may run brute-forcing attacks on the content of the guest authentication token and discover user credentials. For a practical attack vector, the guest users needs to have logged in, the content of the guest user's "OxReaderID" cookie and the value of the "auth" parameter needs to be known to the attacker.

CVE Details

CVSS v3.1 ScoreN/A

Published12/15/2016

Last Modified4/12/2025

Sourcenvd

Honeypot Sightings0

Affected Products

open-xchange:ox_guard

Weaknesses (CWE)

CWE-255

References

http://www.securityfocus.com/archive/1/538732/100/0/threaded(cve@mitre.org)

http://www.securitytracker.com/id/1036154(cve@mitre.org)

http://www.securityfocus.com/archive/1/538732/100/0/threaded(af854a3a-2127-422b-91ae-364da2661108)

http://www.securitytracker.com/id/1036154(af854a3a-2127-422b-91ae-364da2661108)

IOC Correlations

No correlations recorded

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