Padding Oracle Attack Vulnerability in Oberon Microsystems AG’s ocrypto Library
CVE-2025-7071

5.9MEDIUM

Key Information:

Vendor

Oberon Microsystems Ag

Status
Ocrypto
Vendor
CVE Published:
29 August 2025

What is CVE-2025-7071?

The ocrypto library developed by Oberon Microsystems AG is susceptible to a padding oracle attack across various versions. This vulnerability allows attackers to exploit timing discrepancies in the AES-CBC PKCS#7 decryption process, enabling them to reconstruct plaintexts. Versions from 3.1.0 to 3.9.1 are particularly at risk, highlighting the need for immediate remediation to prevent unauthorized data access.

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Affected Version(s)

ocrypto 3.1.0 <= 3.9.1

References

https://www.oberon.ch/security-advisories/cve-2025-7071/

CVSS V4

Score:
5.9
Severity:
MEDIUM
Confidentiality:
High
Integrity:
None
Availability:
None
Attack Vector:
Local
Attack Complexity:
High
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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