wolfSSL (formerly CyaSSL) before 3.6.8 does not properly handle faults associated with…
Priority LOW 34Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- —
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
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.
Why it matters now
EPSS 0.05073 92nd percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 5
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:wolfssl:wolfssl:*:*:*:*:*:*:*:* | before 3.6.8 | Vulnerable | wolfSSL |
| cpe:2.3:o:opensuse:leap:42.1:*:*:*:*:*:*:* | 42.1 | Vulnerable | openSUSE |
| cpe:2.3:o:opensuse:opensuse:13.1:*:*:*:*:*:*:* | 13.1 | Vulnerable | openSUSE |
| cpe:2.3:o:opensuse:opensuse:13.2:*:*:*:*:*:*:* | 13.2 | Vulnerable | openSUSE |
| cpe:2.3:a:mariadb:mariadb:*:*:*:*:*:*:*:* | 5.5.0 to before 5.5.46; 10.0.0 to before 10.0.22; 10.1.0 to before 10.1.9 | Vulnerable | MariaDB |
- cpe:2.3:a:wolfssl:wolfssl:*:*:*:*:*:*:*:* Versions before 3.6.8 Vulnerable ·wolfSSL
- cpe:2.3:o:opensuse:leap:42.1:*:*:*:*:*:*:* Versions 42.1 Vulnerable ·openSUSE
- cpe:2.3:o:opensuse:opensuse:13.1:*:*:*:*:*:*:* Versions 13.1 Vulnerable ·openSUSE
- cpe:2.3:o:opensuse:opensuse:13.2:*:*:*:*:*:*:* Versions 13.2 Vulnerable ·openSUSE
- cpe:2.3:a:mariadb:mariadb:*:*:*:*:*:*:*:* Versions 5.5.0 to before 5.5.46; 10.0.0 to before 10.0.22; 10.1.0 to before 10.1.9 Vulnerable ·MariaDB
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
Not affected: 7 products
- Red Hat Enterprise Linux 5
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux OpenStack Platform 5 (Icehouse)
- Red Hat Enterprise Linux OpenStack Platform 6 (Juno)
- Red Hat Enterprise Linux OpenStack Platform 7 (Kilo)
- Red Hat Software Collections
Timeline
- 2026-10-02 Threatist record created from CVE-2015-7744
- 2026-10-03 Alias added: GHSA-f7wf-fgwg-64px
References
Exploit 2
Advisory 6
- openSUSE-SU-2016:0367
- http://wolfssl.com/wolfSSL/Docs-wolfssl-changelog.html
- 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
- openSUSE-SU-2016:0377
Sources
- CVE-2015-7744 · CVE Program
- CVE-2015-7744 · NVD
- FIRST EPSS
- GHSA-f7wf-fgwg-64px · GitHub Advisory Database · CC BY 4.0
- CVE-2015-7744 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences