CVE-2015-7940

critical

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."

References

Advisories
More

http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html

http://www.openwall.com/lists/oss-security/2015/10/22/9

http://www.openwall.com/lists/oss-security/2015/10/22/7

http://lists.opensuse.org/opensuse-security-announce/2015-11/msg00012.html

https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html

https://www.oracle.com/security-alerts/cpuapr2020.html

https://usn.ubuntu.com/3727-1/

http://www.securitytracker.com/id/1037053

http://www.securitytracker.com/id/1037046

http://www.securitytracker.com/id/1037036

http://www.securityfocus.com/bid/79091

http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html

http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html

http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html

http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html

http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html

http://www.debian.org/security/2015/dsa-3417

http://web-in-security.blogspot.ca/2015/09/practical-invalid-curve-attacks.html

http://rhn.redhat.com/errata/RHSA-2016-2036.html

http://rhn.redhat.com/errata/RHSA-2016-2035.html

http://lists.fedoraproject.org/pipermail/package-announce/2016-January/174915.html

Details

Source: Mitre, NVD

Published: 2015-11-09

Updated: 2025-04-12

Risk Information

CVSS v2

Base Score: 5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N

Severity: Medium

CVSS v3

Base Score: 9.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Severity: Critical

EPSS

EPSS: 0.00963