Vulnerability CVE-2015-0285
Published: 2015-03-19   Modified: 2015-03-20

Description:
The ssl3_client_hello function in s3_clnt.c in OpenSSL 1.0.2 before 1.0.2a does not ensure that the PRNG is seeded before proceeding with a handshake, which makes it easier for remote attackers to defeat cryptographic protection mechanisms by sniffing the network and then conducting a brute-force attack.

Type:

CWE-310

 (Cryptographic Issues)

CVSS2 => (AV:N/AC:M/Au:N/C:P/I:N/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
4.3/10
2.9/10
8.6/10
Exploit range
Attack complexity
Authentication
Remote
Medium
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
None
None
Affected software
Openssl -> Openssl 

 References:
http://marc.info/?l=bugtraq&m=143748090628601&w=2
http://marc.info/?l=bugtraq&m=144050155601375&w=2
http://marc.info/?l=bugtraq&m=144050297101809&w=2
http://www.fortiguard.com/advisory/2015-03-24-openssl-vulnerabilities-march-2015
http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
http://www.oracle.com/technetwork/topics/security/bulletinapr2015-2511959.html
http://www.oracle.com/technetwork/topics/security/cpujan2016-2367955.html
http://www.oracle.com/technetwork/topics/security/cpujul2015-2367936.html
http://www.oracle.com/technetwork/topics/security/cpuoct2015-2367953.html
http://www.securityfocus.com/bid/73234
http://www.securitytracker.com/id/1031929
https://bto.bluecoat.com/security-advisory/sa92
https://bugzilla.redhat.com/show_bug.cgi?id=1202410
https://git.openssl.org/gitweb/?p=openssl.git;a=commit;h=e1b568dd2462f7cacf98f3d117936c34e2849a6b
https://kc.mcafee.com/corporate/index?page=content&id=SB10110
https://security.gentoo.org/glsa/201503-11
https://www.openssl.org/news/secadv_20150319.txt
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