CVE-2016-4028

lowPriorität · verfolgen · 30EPSS 0.007 · 53. PerzentilEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.71% (53rd) EPSS

CVSS 3.5 · low

Is it mine?

2 products

Prüfe deine Angriffsfläche

Who says so?

3 sources

cnnvd · enisa_euvd · nvd

EPSS · bewertet 2026-10-27

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.

cvss

Technischer Schweregrad, 0–10. Eine Zeile je Quelle.

7.5

010

Basiswert 0–10 · höher = schwerwiegender · Vektor überfahren zum Auflösen⚠ Quellen uneinig · low–high · 3.5–7.5

v2.03.5lowAV:N/AC:M/Au:S/C:P/I:N/A:Nprimary · NVD / NIST USAusnutzbarkeit 6.8 · Auswirkung 2.9

v3.07.5highCVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USAusnutzbarkeit 1.6 · Auswirkung 5.9

v3.06.9mediumCVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

schwächen

Die CWE-Schwächeklassen, zu denen dies gehört.

CWE-255USprimär

betroffene Produkte (2)

Betroffene Produkte und Versionsbereiche.

n/a n/a≤ n/aenisa_euvdEU
open-xchange ox guard≤ 2.4.0nvdUScpe:2.3:a:open-xchange:ox_guard:*:*:*:*:*:*:*:*

auch bekannt als (3)

Weitere Namen und Kennungen dieser Entität.

quellen

Welche Quellen diesen Datensatz belegen und wann.

cnnvd enisa_euvd nvd NVD CVE.org MITRE

veröffentlicht 2016-12-15geändert 2026-06-17

verwandt (920)

Verwandte Einträge.

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+915 weitere

Referenzen (7)

Externe Belege — Patches, Meldungen, Analysen.

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