CVE-2015-7744
WolfSSL Lenstra Attack Vulnerability
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.
INFO
Published Date :
Jan. 22, 2016, 3:59 p.m.
Last Modified :
Aug. 29, 2022, 8:52 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.6
Exploitability Score :
2.2
Affected Products
The following products are affected by CVE-2015-7744
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2015-7744.
| URL | Resource |
|---|---|
| http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00015.html | Mailing List Third Party Advisory |
| http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00016.html | Mailing List Third Party Advisory |
| http://wolfssl.com/wolfSSL/Docs-wolfssl-changelog.html | Release Notes Vendor Advisory |
| http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html | Third Party Advisory |
| http://www.oracle.com/technetwork/topics/security/cpujan2016-2367955.html | Vendor Advisory |
| http://www.securitytracker.com/id/1034708 | Broken Link Third Party Advisory VDB Entry |
| https://people.redhat.com/~fweimer/rsa-crt-leaks.pdf | Exploit Third Party Advisory |
| https://securityblog.redhat.com/2015/09/02/factoring-rsa-keys-with-tls-perfect-forward-secrecy/ | Exploit Third 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 | Vendor Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2015-7744 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2015-7744 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Modified Analysis by [email protected]
Aug. 29, 2022
Action Type Old Value New Value Removed CVSS V3 NIST AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N Added CVSS V3.1 NIST AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N Changed Reference Type http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00015.html No Types Assigned http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00015.html Mailing List, Third Party Advisory Changed Reference Type http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00016.html No Types Assigned http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00016.html Mailing List, Third Party Advisory Changed Reference Type http://wolfssl.com/wolfSSL/Docs-wolfssl-changelog.html No Types Assigned http://wolfssl.com/wolfSSL/Docs-wolfssl-changelog.html Release Notes, Vendor Advisory Changed Reference Type http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html No Types Assigned http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html Third Party Advisory Changed Reference Type http://www.securitytracker.com/id/1034708 No Types Assigned http://www.securitytracker.com/id/1034708 Broken Link, Third Party Advisory, VDB Entry Changed Reference Type https://people.redhat.com/~fweimer/rsa-crt-leaks.pdf Exploit https://people.redhat.com/~fweimer/rsa-crt-leaks.pdf Exploit, Third Party Advisory Changed Reference Type https://securityblog.redhat.com/2015/09/02/factoring-rsa-keys-with-tls-perfect-forward-secrecy/ Exploit https://securityblog.redhat.com/2015/09/02/factoring-rsa-keys-with-tls-perfect-forward-secrecy/ Exploit, Third Party Advisory Removed CWE NIST CWE-19 Added CWE NIST NVD-CWE-noinfo Changed CPE Configuration OR *cpe:2.3:a:wolfssl:wolfssl:*:*:*:*:*:*:*:* versions up to (including) 3.6.6 OR *cpe:2.3:a:wolfssl:wolfssl:*:*:*:*:*:*:*:* versions up to (excluding) 3.6.8 Changed CPE Configuration OR *cpe:2.3:o:opensuse:leap:42.1:*:*:*:*:*:*:* *cpe:2.3:o:opensuse:opensuse:13.2:*:*:*:*:*:*:* OR *cpe:2.3:o:opensuse:leap:42.1:*:*:*:*:*:*:* *cpe:2.3:o:opensuse:opensuse:13.1:*:*:*:*:*:*:* *cpe:2.3:o:opensuse:opensuse:13.2:*:*:*:*:*:*:* Added CPE Configuration OR *cpe:2.3:a:mariadb:mariadb:*:*:*:*:*:*:*:* versions from (including) 5.5.0 up to (excluding) 5.5.46 *cpe:2.3:a:mariadb:mariadb:*:*:*:*:*:*:*:* versions from (including) 10.0.0 up to (excluding) 10.0.22 *cpe:2.3:a:mariadb:mariadb:*:*:*:*:*:*:*:* versions from (including) 10.1.0 up to (excluding) 10.1.9 -
CPE Deprecation Remap by [email protected]
Oct. 30, 2018
Action Type Old Value New Value Changed CPE Configuration OR *cpe:2.3:o:novell:opensuse:13.2:*:*:*:*:*:*:* OR *cpe:2.3:o:opensuse:opensuse:13.2:*:*:*:*:*:*:* -
CPE Deprecation Remap by [email protected]
Oct. 30, 2018
Action Type Old Value New Value Changed CPE Configuration OR *cpe:2.3:o:novell:leap:42.1:*:*:*:*:*:*:* OR *cpe:2.3:o:opensuse:leap:42.1:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Dec. 07, 2016
Action Type Old Value New Value Added Reference http://www.securitytracker.com/id/1034708 [No Types Assigned] -
CVE Modified by [email protected]
Dec. 06, 2016
Action Type Old Value New Value Added Reference http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00016.html [No Types Assigned] -
CVE Modified by [email protected]
Oct. 04, 2016
Action Type Old Value New Value Added Reference http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html -
Modified Analysis by [email protected]
Jun. 27, 2016
Action Type Old Value New Value Changed CPE Configuration Configuration 1 OR *cpe:2.3:a:wolfssl:wolfssl:3.6.6:*:*:*:*:*:*:* (and previous) Configuration 1 OR *cpe:2.3:a:wolfssl:wolfssl:3.6.6:*:*:*:*:*:*:* (and previous) Configuration 2 OR *cpe:2.3:o:novell:opensuse:13.2:*:*:*:*:*:*:* *cpe:2.3:o:novell:leap:42.1:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Apr. 12, 2016
Action Type Old Value New Value Added Reference http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00015.html -
CVE Translated by [email protected]
Feb. 17, 2016
Action Type Old Value New Value Removed Translation wolfSSL (anteriormente CyaSSL) en versiones anteriores a 3.6.8 no maneja correctamente los fallos asociados con el proceso Chinese Remainder Theorm (CRT) cuando permite el intercambio de clave efímera sin optimizaciones de memoria baja en un servidor, lo que hace más fácil para atacantes remotos obtener claves privadas RSA capturando apretones de manos TLS, también conocido como un ataque Lenstra. Added Translation wolfSSL (anteriormente CyaSSL) en versiones anteriores a 3.6.8 no maneja correctamente fallos asociados con el proceso Chinese Remainder Theorem (CRT) cuando permiten el intercambio de claves efímeras sin optimizaciones de memoria baja en un servidor, lo que hace que sea más fácil para atacantes remotos obtener claves privadas RSA mediante la captura de un apretón de manos TLS, también conocido como un ataque Lenstra. -
CVE Modified by [email protected]
Feb. 12, 2016
Action Type Old Value New Value Changed Description wolfSSL (formerly CyaSSL) before 3.6.8 does not properly handle faults associated with the Chinese Remainder Theorm (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. 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. -
Modified Analysis by [email protected]
Jan. 25, 2016
Action Type Old Value New Value Added CPE Configuration Configuration 1 OR *cpe:2.3:a:wolfssl:wolfssl:3.6.6:*:*:*:*:*:*:* (and previous) Added CVSS V2 (AV:N/AC:H/Au:N/C:P/I:N/A:N) Added CVSS V3 AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N Changed Reference Type https://people.redhat.com/~fweimer/rsa-crt-leaks.pdf No Types Assigned https://people.redhat.com/~fweimer/rsa-crt-leaks.pdf Exploit Changed Reference Type 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 No Types Assigned 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 Advisory Changed Reference Type http://www.oracle.com/technetwork/topics/security/cpujan2016-2367955.html No Types Assigned http://www.oracle.com/technetwork/topics/security/cpujan2016-2367955.html Advisory Changed Reference Type https://securityblog.redhat.com/2015/09/02/factoring-rsa-keys-with-tls-perfect-forward-secrecy/ No Types Assigned https://securityblog.redhat.com/2015/09/02/factoring-rsa-keys-with-tls-perfect-forward-secrecy/ Exploit Added CWE CWE-19 -
Initial Analysis by [email protected]
Jan. 25, 2016
Action Type Old Value New Value
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2015-7744 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2015-7744
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.84 }} 0.34%
score
0.79864
percentile