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.

CVSS v3.0 5.9 MEDIUM
CVSS v2.0 2.6 LOW

5.9^/10

CVSS v3.0 : MEDIUM

V3 Legend

Vector :

Exploitability : 2.2 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

2.6^/10

CVSS v2.0 : LOW

V2 Legend

Vector : AV:N/AC:H/Au:N/C:P/I:N/A:N

Exploitability : 4.9 / Impact : 2.9

Access Vector NETWORK

Access Complexity HIGH

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact NONE

References

Link	Resource
https://people.redhat.com/~fweimer/rsa-crt-leaks.pdf	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
http://wolfssl.com/wolfSSL/Docs-wolfssl-changelog.html	Release Notes Vendor Advisory
http://www.oracle.com/technetwork/topics/security/cpujan2016-2367955.html	Vendor Advisory
https://securityblog.redhat.com/2015/09/02/factoring-rsa-keys-with-tls-perfect-forward-secrecy/	Exploit Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00015.html	Mailing List Third Party Advisory
http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html	Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00016.html	Mailing List Third Party Advisory
http://www.securitytracker.com/id/1034708	Broken Link Third Party Advisory VDB Entry

Configurations

Configuration 1 (hide)

cpe:2.3:a:wolfssl:wolfssl:*:*:*:*:*:*:*:*

Configuration 2 (hide)

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:::::::*

Configuration 3 (hide)

OR	cpe:2.3:a:mariadb:mariadb::::::::
	cpe:2.3:a:mariadb:mariadb::::::::
	cpe:2.3:a:mariadb:mariadb::::::::

Information

Published : 2016-01-22 07:59

Updated : 2022-08-29 13:52

NVD link : CVE-2015-7744

Mitre link : CVE-2015-7744

JSON object : View

CWE

NVD-CWE-noinfo

Products Affected

opensuse

opensuse
leap

mariadb

mariadb

wolfssl

wolfssl

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5.9 /10

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

2.6 /10

Access Vector NETWORK

Access Complexity HIGH

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact NONE

JSON object

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