wolfSSL: insufficient hardening of RSA-CRT implementation (Oracle MySQL CPU Jan 2016)
Published Jan 22, 2016
5.9
MEDIUMCVSS 3.1
EPSS 5.03%
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 products
No data.
No data.
Red Hat Enterprise Linux 5
mysql55-mysql
Not affected
Red Hat Enterprise Linux 6
mysql
Not affected
Red Hat Enterprise Linux 7
mariadb
Not affected
Red Hat Enterprise Linux OpenStack Platform 5 (Icehouse)
mariadb-galera
Not affected
Red Hat Enterprise Linux OpenStack Platform 6 (Juno)
mariadb-galera
Not affected
Red Hat Enterprise Linux OpenStack Platform 7 (Kilo)
mariadb-galera
Not affected
Red Hat Software Collections
mariadb55-mariadb
Not affected
Red Hat Software Collections
mysql55-mysql
Not affected
Red Hat Software Collections
rh-mariadb100-mariadb
Not affected
Red Hat Software Collections
rh-mysql56-mysql
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | mysql55-mysql | Not affected | n/a |
| Red Hat Enterprise Linux 6 | mysql | Not affected | n/a |
| Red Hat Enterprise Linux 7 | mariadb | Not affected | n/a |
| Red Hat Enterprise Linux OpenStack Platform 5 (Icehouse) | mariadb-galera | Not affected | n/a |
| Red Hat Enterprise Linux OpenStack Platform 6 (Juno) | mariadb-galera | Not affected | n/a |
| Red Hat Enterprise Linux OpenStack Platform 7 (Kilo) | mariadb-galera | Not affected | n/a |
| Red Hat Software Collections | mariadb55-mariadb | Not affected | n/a |
| Red Hat Software Collections | mysql55-mysql | Not affected | n/a |
| Red Hat Software Collections | rh-mariadb100-mariadb | Not affected | n/a |
| Red Hat Software Collections | rh-mysql56-mysql | Not affected | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
No CVSS v3.0 score for this CVE.
AV:N/AC:H/Au:N/C:P/I:N/A:N
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (15 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 5.03% (0.05031) | 92.00th | v5 (v2026.06.15) |
| Jun 15, 2026 | 5.03% (0.05031) | 91.13th | v5 (v2026.06.15) |
| Jul 2, 2025 | 2.74% (0.02739) | 85.40th | v4 (v2025.03.14) |
| Mar 30, 2025 | 1.57% (0.01566) | 79.80th | v4 (v2025.03.14) |
| Mar 29, 2025 | 4.58% (0.04584) | 81.67th | v4 (v2025.03.14) |
| Mar 19, 2025 | 1.57% (0.01566) | 79.48th | v4 (v2025.03.14) |
| Mar 17, 2025 | 4.03% (0.04029) | 87.71th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.84% (0.00838) | 82.77th | v3 (v2023.03.01) |
| Apr 19, 2024 | 0.84% (0.00838) | 81.87th | v3 (v2023.03.01) |
| Aug 6, 2023 | 0.84% (0.00838) | 79.86th | v3 (v2023.03.01) |
| Jul 4, 2023 | 0.50% (0.00498) | 72.99th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.49% (0.00490) | 72.39th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.97% (0.01974) | 78.97th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.97% (0.01974) | 77.12th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.97% (0.01974) | 56.20th | v2 (v2022.01.01) |
References (14)
- http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00015.html vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00016.html vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory
- http://wolfssl.com/wolfSSL/Docs-wolfssl-changelog.html x_refsource_CONFIRMRelease NotesVendor Advisory
- http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html x_refsource_CONFIRMThird Party Advisory
- http://www.oracle.com/technetwork/topics/security/cpujan2016-2367955.html x_refsource_CONFIRMVendor Advisory
- http://www.oracle.com/technetwork/topics/security/cpujan2016verbose-2367956.html
- http://www.securitytracker.com/id/1034708 vdb-entryx_refsource_SECTRACKBroken LinkThird Party AdvisoryVDB Entry
- https://access.redhat.com/security/cve/CVE-2015-7744 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1301488 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2015-7744
- https://people.redhat.com/~fweimer/rsa-crt-leaks.pdf x_refsource_MISCExploitThird Party Advisory
- https://securityblog.redhat.com/2015/09/02/factoring-rsa-keys-with-tls-perfect-forward-secrecy/ x_refsource_MISCExploitThird 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 x_refsource_CONFIRMVendor Advisory
- https://www.cve.org/CVERecord?id=CVE-2015-7744
Change history (0)
No recorded changes yet.