Description
wolfSSL (formerly CyaSSL) before 3.6.8 does not properly handle faults associated with the Chinese Remainder Theorem (CRT) process when allowing ephemeral key exchange without low memory optimizations on a server, which makes it easier for remote attackers to obtain private RSA keys by capturing TLS handshakes, aka a Lenstra attack.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
n/a n/a
n/aaffected
References
- http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00015.html ↗
- http://www.securitytracker.com/id/1034708 ↗
- http://wolfssl.com/wolfSSL/Docs-wolfssl-changelog.html ↗
- https://people.redhat.com/~fweimer/rsa-crt-leaks.pdf ↗
- http://www.oracle.com/technetwork/topics/security/cpujan2016-2367955.html ↗
- http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html ↗
- https://wolfssl.com/wolfSSL/Blog/Entries/2015/9/17_Two_Vulnerabilities_Recently_Found%2C_An_Attack_on_RSA_using_CRT_and_DoS_Vulnerability_With_DTLS.html ↗
- https://securityblog.redhat.com/2015/09/02/factoring-rsa-keys-with-tls-perfect-forward-secrecy/ ↗
- http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00016.html ↗