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Medium · 5.9 CVE-2025-7071 EUVD-2025-28779GHSA-fw6m-5fq2-8fqr

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

Published Aug 29, 2025 · Updated Aug 29, 2025 · Assigned by NCSC.ch

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.

Affected products

VendorProductAffectedFixed
Oberon microsystems ocrypto 3.1.0 – ≤ 3.9.1 —

References