# CVE-2017-13098

## Summary

- **CVE ID:** CVE-2017-13098
- **Severity:** HIGH
- **CVSS Score:** 7.5 (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N)
- **CWE:** CWE-203
- **Published:** Dec 13, 2017
- **Last Modified:** Mar 14, 2026

## Description

BouncyCastle TLS prior to version 1.0.3, when configured to use the JCE (Java Cryptography Extension) for cryptographic functions, provides a weak Bleichenbacher oracle when any TLS cipher suite using RSA key exchange is negotiated. An attacker can recover the private key from a vulnerable application. This vulnerability is referred to as "ROBOT."

## Affected Products

- Legion of the Bouncy Castle — BouncyCastle TLS (<1.0.3)

## References

- [CNA](http://www.securityfocus.com/bid/102195)
- [CNA](http://www.kb.cert.org/vuls/id/144389)
- [CNA](https://www.debian.org/security/2017/dsa-4072)
- [CNA](http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00011.html)
- [CNA](https://www.oracle.com/security-alerts/cpuoct2020.html)
- [CNA](https://robotattack.org/)
- [CNA](https://github.com/bcgit/bc-java/commit/a00b684465b38d722ca9a3543b8af8568e6bad5c)
- [CNA](https://security.netapp.com/advisory/ntap-20171222-0001/)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 66.23%
- **EPSS Percentile:** 98.5

---
_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._