GHSA-gqx7-6552-67hf
Improper Verification of Cryptographic Signature in com.oviva.telematik:epa4all-client
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| Maven | com.oviva.telematik:epa4all-client | < 1.2.2 | 1.2.2 |
Details
As written in the advisory (Markdown source, shown as plain text).
### Impact
An attacker who can MITM the TLS connection between the client and the IDP (within the TI network) can substitute a forged discovery document. The forged document redirects u ri_puk_idp_enc and uri_puk_idp_sig to attacker-controlled URLs. The client then encrypts the SMC-B-signed challenge response to the attacker's encryption key and POSTs it to the attacker's auth endpoint. This captures the signed authentication material.
### Patches
[#36](https://github.com/oviva-ag/epa4all-client/pull/36)
### Workarounds
None.
### Resources
- MS-OVIVA-EPA4ALL-d453c1
### Credits
[Machine Spirits](https://machinespirits.com/) ([[email protected]](mailto:[email protected]))
- Dr. rer. nat. Simon Weber
- Dipl.-Inf. Volker Schönefeld
- Chiara Fliegner
References
External links from the advisory. They lead to third-party sites.
- https://github.com/oviva-ag/epa4all-client/security/advisories/GHSA-gqx7-6552-67hf
- https://nvd.nist.gov/vuln/detail/CVE-2026-45575
- https://github.com/oviva-ag/epa4all-client/pull/36
- https://github.com/oviva-ag/epa4all-client/commit/9111d6fbb939007036a7f74b2a93bb278cb5af32
- https://github.com/oviva-ag/epa4all-client
- https://github.com/oviva-ag/epa4all-client/releases/tag/v1.2.2