Vulnerability Monitor

The vendors, products, and vulnerabilities you care about

CVE-2015-7744

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.

Published

2016-01-22T15:59:04.570

Last Modified

2025-04-12T10:46:40.837

Status

Deferred

Source

[email protected]

Severity

CVSSv3.1: 5.9 (MEDIUM)

CVSSv2 Vector

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

Exploitability Score

4.9

Impact Score

2.9

Weaknesses

Type: Primary
NVD-CWE-noinfo

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	wolfssl	wolfssl	< 3.6.8	Yes
Operating System	opensuse	leap	42.1	Yes
Operating System	opensuse	opensuse	13.1	Yes
Operating System	opensuse	opensuse	13.2	Yes
Application	mariadb	mariadb	< 5.5.46	Yes
Application	mariadb	mariadb	< 10.0.22	Yes
Application	mariadb	mariadb	< 10.1.9	Yes

References

http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00015.html Mailing List, Third Party Advisory ([email protected])
http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00016.html Mailing List, Third Party Advisory ([email protected])
http://wolfssl.com/wolfSSL/Docs-wolfssl-changelog.html Release Notes, Vendor Advisory ([email protected])
http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html Third Party Advisory ([email protected])
http://www.oracle.com/technetwork/topics/security/cpujan2016-2367955.html Vendor Advisory ([email protected])
http://www.securitytracker.com/id/1034708 Broken Link, Third Party Advisory, VDB Entry ([email protected])
https://people.redhat.com/~fweimer/rsa-crt-leaks.pdf Exploit, Third Party Advisory ([email protected])
https://securityblog.redhat.com/2015/09/02/factoring-rsa-keys-with-tls-perfect-forward-secrecy/ Exploit, Third Party Advisory ([email protected])
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 Vendor Advisory ([email protected])
http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00015.html Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00016.html Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://wolfssl.com/wolfSSL/Docs-wolfssl-changelog.html Release Notes, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.oracle.com/technetwork/topics/security/cpujan2016-2367955.html Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.securitytracker.com/id/1034708 Broken Link, Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
https://people.redhat.com/~fweimer/rsa-crt-leaks.pdf Exploit, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://securityblog.redhat.com/2015/09/02/factoring-rsa-keys-with-tls-perfect-forward-secrecy/ Exploit, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
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 Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)