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CVE-2015-7744
wolfSSL (formerly CyaSSL) before 3.6.8 does not properly handle faults associated with the Chinese Remainder Theorem (CRT) process when…
Medium5.9EPSS 5.1%
- Published
- Updated
- Reserved
- Assigned by
- mitre
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N |
- EPSS (exploitation in 30 days)
- 5.1% · top 7.7% of all CVEs (3 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.9.
Weakness
- n/a
Affected products
n/a
- affected n/a
References (9)
- openSUSE-SU-2016:0367 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- 1034708 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- http://wolfssl.com/wolfSSL/Docs-wolfssl-changelog.html (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://people.redhat.com/~fweimer/rsa-crt-leaks.pdf (opens in a new tab)x_refsource_MISCx_transferred
- http://www.oracle.com/technetwork/topics/security/cpujan2016-2367955.html (opens in a new tab)x_refsource_CONFIRMx_transferred
- http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html (opens in a new tab)x_refsource_CONFIRMx_transferred
- 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 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://securityblog.redhat.com/2015/09/02/factoring-rsa-keys-with-tls-perfect-forward-secrecy/ (opens in a new tab)x_refsource_MISCx_transferred
- openSUSE-SU-2016:0377 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
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[](https://trackcve.app/cve/CVE-2015-7744)Record last updated .