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.
The MITRE CVE dictionary describes this issue as:
Find out more about CVE-2015-7744 from the MITRE CVE dictionary dictionary and NIST NVD.
NOTE: The following CVSS v2 metrics and score provided are preliminary and subject to review.
| Base Score | 2.6 |
|---|---|
| Base Metrics | AV:N/AC:H/Au:N/C:P/I:N/A:N |
| Access Vector | Network |
| Access Complexity | High |
| Authentication | None |
| Confidentiality Impact | Partial |
| Integrity Impact | None |
| Availability Impact | None |
Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).
| Platform | Package | State |
|---|---|---|
| Red Hat Software Collections for Red Hat Enterprise Linux | mysql55-mysql | Not affected |
| Red Hat Software Collections for Red Hat Enterprise Linux | mariadb55-mariadb | Not affected |
| Red Hat Software Collections for Red Hat Enterprise Linux | rh-mariadb100-mariadb | Not affected |
| Red Hat Software Collections for Red Hat Enterprise Linux | rh-mysql56-mysql | Not affected |
| Red Hat Enterprise Linux OpenStack Platform 7.0 (Kilo) for RHEL 7 | mariadb-galera | Not affected |
| Red Hat Enterprise Linux OpenStack Platform 6.0 (Juno) for RHEL 7 | mariadb-galera | Not affected |
| Red Hat Enterprise Linux OpenStack Platform 5.0 (Icehouse) | mariadb-galera | Not affected |
| Red Hat Enterprise Linux 7 | mariadb | Not affected |
| Red Hat Enterprise Linux 6 | mysql | Not affected |
| Red Hat Enterprise Linux 5 | mysql55-mysql | Not affected |
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