#VU3403 Information disclosure in The Bouncy Castle Crypto Package For Java - CVE-2015-7940
Published: November 30, -0001 / Updated: June 1, 2020
Vulnerability identifier: #VU3403
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2015-7940
CWE-ID: CWE-200
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
The Bouncy Castle Crypto Package For Java
The Bouncy Castle Crypto Package For Java
Software vendor:
Legion of the Bouncy Castle Inc.
Legion of the Bouncy Castle Inc.
Description
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due 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."
Remediation
Install update from vendor's website.
External links
- http://lists.fedoraproject.org/pipermail/package-announce/2016-January/174915.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