CVE-2015-7744

Summary

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 Software

Weaknesses

• n/a

ADP Enrichment

CVE Program Container

Additional 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

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

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