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Vulnerability Details : 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.
Publish Date : 2016-01-22 Last Update Date : 2018-10-30
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- CVSS Scores & Vulnerability Types

CVSS Score
2.6
Confidentiality Impact Partial (There is considerable informational disclosure.)
Integrity Impact None (There is no impact to the integrity of the system)
Availability Impact None (There is no impact to the availability of the system.)
Access Complexity High (Specialized access conditions exist. It is hard to exploit and several special conditions must be satisfied to exploit)
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s)
CWE ID 19

- Products Affected By CVE-2015-7744

# Product Type Vendor Product Version Update Edition Language
1 OS Opensuse Leap 42.1 Version Details Vulnerabilities
2 OS Opensuse Opensuse 13.2 Version Details Vulnerabilities
3 Application Wolfssl Wolfssl 3.6.6 Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Opensuse Leap 1
Opensuse Opensuse 1
Wolfssl Wolfssl 1

- References For CVE-2015-7744

http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00015.html
SUSE openSUSE-SU-2016:0367
https://people.redhat.com/~fweimer/rsa-crt-leaks.pdf
https://securityblog.redhat.com/2015/09/02/factoring-rsa-keys-with-tls-perfect-forward-secrecy/
http://wolfssl.com/wolfSSL/Docs-wolfssl-changelog.html CONFIRM
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 CONFIRM
http://www.oracle.com/technetwork/topics/security/cpujan2016-2367955.html CONFIRM
http://www.securitytracker.com/id/1034708
SECTRACK 1034708
http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html CONFIRM
http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00016.html
SUSE openSUSE-SU-2016:0377

- Metasploit Modules Related To CVE-2015-7744

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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