CVE-2025-7071

Timing side-channel vulnerability in AES-CBC decryption with PKCS#7 padding in ocrypto library

Description

Padding oracle attack vulnerability in Oberon microsystem AG’s ocrypto library in all versions since 3.1.0 and prior to 3.9.2 allows an attacker to recover plaintexts via timing measurements of AES-CBC PKCS#7 decrypt operations.

Remediation

Solution:

  • Affected users should upgrade to ocrypto 3.9.2 or later.

Category

5.9
CVSS
Severity: Medium
CVSS 4.0 •
EPSS 0.01%
Affected: Oberon microsystems AG ocrypto
Published at:
Updated at:

References

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

Frequently Asked Questions

What is the severity of CVE-2025-7071?
CVE-2025-7071 has been scored as a medium severity vulnerability.
How to fix CVE-2025-7071?
To fix CVE-2025-7071: Affected users should upgrade to ocrypto 3.9.2 or later.
Is CVE-2025-7071 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-7071 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-7071?
CVE-2025-7071 affects Oberon microsystems AG ocrypto.
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