Timing side-channel vulnerability in AES-CBC decryption with PKCS#7 padding in ocrypto library
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Oberon microsystems AG | ocrypto | unaffected |
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Vendor Solution
Affected users should upgrade to ocrypto 3.9.2 or later.
| Source | ID | Title |
|---|---|---|
EUVD |
EUVD-2025-28779 | 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. |
No CVSS v3.1
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.090% probability within 30 days)
| Link | Providers |
|---|---|
| https://www.oberon.ch/security-advisories/cve-2025-7071/ |
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| Type | Values Removed | Values Added |
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| Metrics |
ssvc
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| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | Timing side-channel vulnerability in AES-CBC decryption with PKCS#7 padding in ocrypto library | |
| Weaknesses | CWE-208 CWE-327 |
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| References |
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| Metrics |
cvssV4_0
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