CVEvulnerability
CVE-2015-7744
5.9 MEDIUM
Official page ↗
- Status
- Modified
- Published
- 2016-01-22
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 5.9 MEDIUM — CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
- CVSS 2.0 ([email protected])
- 2.6 LOW — AV:N/AC:H/Au:N/C:P/I:N/A:N
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 configurations
• wolfssl wolfssl (< 3.6.8)
• opensuse leap 42.1
• opensuse opensuse 13.1
• opensuse opensuse 13.2
• mariadb mariadb (>= 5.5.0 < 5.5.46)
• mariadb mariadb (>= 10.0.0 < 10.0.22)
• mariadb mariadb (>= 10.1.0 < 10.1.9)
References
- http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00015.html Mailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00016.html Mailing List, Third Party Advisory
- http://wolfssl.com/wolfSSL/Docs-wolfssl-changelog.html Release Notes, Vendor Advisory
- http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html Third Party Advisory
- http://www.oracle.com/technetwork/topics/security/cpujan2016-2367955.html Vendor Advisory
- http://www.securitytracker.com/id/1034708 Broken Link, Third Party Advisory, VDB Entry
- https://people.redhat.com/~fweimer/rsa-crt-leaks.pdf Exploit, Third Party Advisory
- https://securityblog.redhat.com/2015/09/02/factoring-rsa-keys-with-tls-perfect-forward-secrecy/ Exploit, Third Party Advisory
- 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 Vendor Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00015.html Mailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00016.html Mailing List, Third Party Advisory
- http://wolfssl.com/wolfSSL/Docs-wolfssl-changelog.html Release Notes, Vendor Advisory
- http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html Third Party Advisory
- http://www.oracle.com/technetwork/topics/security/cpujan2016-2367955.html Vendor Advisory
- http://www.securitytracker.com/id/1034708 Broken Link, Third Party Advisory, VDB Entry
- https://people.redhat.com/~fweimer/rsa-crt-leaks.pdf Exploit, Third Party Advisory
- https://securityblog.redhat.com/2015/09/02/factoring-rsa-keys-with-tls-perfect-forward-secrecy/ Exploit, Third Party Advisory
- 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 Vendor Advisory