What’s Vulnerable › Vulnerabilities

CVE-2015-7940

• Severity: medium (CVSS 5.0 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 4.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2015-11-09 · updated 2026-06-17
• Weakness: CWE-200

Description

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."

Affected products

• Bouncycastle Bouncy Castle Crypto Package: through 1.50
• openSUSE Leap: 42.1
• Opensuse: 13.1, 13.2
• Oracle Corporation Oracle Application Testing Suite: 12.5.0.1, 12.5.0.2, 12.5.0.3
• Oracle Corporation Enterprise Manager Ops Center: 12.1.4, 12.2.2
• Oracle Corporation PeopleSoft Enterprise PT PeopleTools: 8.54, 8.55
• Oracle Virtual Desktop Infrastructure: 3.5.2

References

• http://lists.fedoraproject.org/pipermail/package-announce/2016-January/174915.html
• http://lists.opensuse.org/opensuse-security-announce/2015-11/msg00012.html
• http://rhn.redhat.com/errata/RHSA-2016-2035.html
• http://rhn.redhat.com/errata/RHSA-2016-2036.html
• http://web-in-security.blogspot.ca/2015/09/practical-invalid-curve-attacks.html
• http://www.debian.org/security/2015/dsa-3417
• http://www.openwall.com/lists/oss-security/2015/10/22/7
• http://www.openwall.com/lists/oss-security/2015/10/22/9
• http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html
• http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html
• http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html
• http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html

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