CVE-2015-7744
Status: ModifiedMedium (5.9)—
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.
CVSS
- Version: 3.1
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
- Base score: 5.9
Exploitation probability (EPSS)
- Probability of exploitation in the next 30 days: 5.03%
- Percentile among all scored CVEs: 92
- Score date: 10/7/2026
EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).
Affected technologies (4)
CWEs
- NVD-CWE-noinfo
References
- http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00015.html
- http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00016.html
- http://wolfssl.com/wolfSSL/Docs-wolfssl-changelog.html
- http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
- http://www.oracle.com/technetwork/topics/security/cpujan2016-2367955.html
- http://www.securitytracker.com/id/1034708
- https://people.redhat.com/~fweimer/rsa-crt-leaks.pdf
- https://securityblog.redhat.com/2015/09/02/factoring-rsa-keys-with-tls-perfect-forward-secrecy/
- 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
- http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00015.html
- http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00016.html
- http://wolfssl.com/wolfSSL/Docs-wolfssl-changelog.html
- http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
- http://www.oracle.com/technetwork/topics/security/cpujan2016-2367955.html
- http://www.securitytracker.com/id/1034708
- https://people.redhat.com/~fweimer/rsa-crt-leaks.pdf
- https://securityblog.redhat.com/2015/09/02/factoring-rsa-keys-with-tls-perfect-forward-secrecy/
- 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
Raw JSON (NVD)
Show
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