CVE-2015-7940: Exposure of Sensitive Information to an Unauthorized Actor

October 17, 2018 (updated September 1, 2021)

The Bouncy Castle Java library before 1.51 does not validate a point is withing the elliptic curve, which makes it easier for remote attackers to obtain private keys via a series of crafted elliptic curve Diffie Hellman (ECDH) key exchanges, aka an “invalid curve attack.”

References

github.com/advisories/GHSA-4mv7-cq75-3qjm
nvd.nist.gov/vuln/detail/CVE-2015-7940

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