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CVE-2015-3193Date: (C)2015-12-15   (M)2018-02-19


The Montgomery squaring implementation in crypto/bn/asm/x86_64-mont5.pl in OpenSSL 1.0.2 before 1.0.2e on the x86_64 platform, as used by the BN_mod_exp function, mishandles carry propagation and produces incorrect output, which makes it easier for remote attackers to obtain sensitive private-key information via an attack against use of a (1) Diffie-Hellman (DH) or (2) Diffie-Hellman Ephemeral (DHE) ciphersuite.

CVSS V3 Severity:CVSS V2 Severity:
CVSS Score  : CVSS Score  : 5.0
Exploit Score: Exploit Score: 10.0
Impact Score : Impact Score : 2.9
 
CVSS V3 Metrics:CVSS V2 Metrics:
Attack Vector: Access Vector: NETWORK
Attack Complexity: Access Complexity: LOW
Privileges Required: Authentication: NONE
User Interaction: Confidentiality: PARTIAL
Scope: Integrity: NONE
Confidentiality: Availability: NONE
Integrity:  
Availability:  
  





Reference:
SECTRACK-1034294
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20151204-openssl
BID-78705
BID-91787
SSA:2015-349-01
SSA:2015-349-04
USN-2830-1
http://fortiguard.com/advisory/openssl-advisory-december-2015
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10759
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10761
http://openssl.org/news/secadv/20151203.txt
http://www.fortiguard.com/advisory/openssl-advisory-december-2015
http://www.oracle.com/technetwork/security-advisory/cpuapr2016v3-2985753.html
http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html
http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
https://blog.fuzzing-project.org/31-Fuzzing-Math-miscalculations-in-OpenSSLs-BN_mod_exp-CVE-2015-3193.html
https://bugzilla.redhat.com/show_bug.cgi?id=1288317
https://git.openssl.org/?p=openssl.git;a=commit;h=d73cc256c8e256c32ed959456101b73ba9842f72
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05398322
https://kb.isc.org/article/AA-01438
https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA40100

CPE    5
cpe:/a:openssl:openssl:1.0.2
cpe:/a:openssl:openssl:1.0.2b
cpe:/a:openssl:openssl:1.0.2a
cpe:/a:openssl:openssl:1.0.2d
...
CWE    1
CWE-200
OVAL    5
oval:org.secpod.oval:def:37851
oval:org.secpod.oval:def:31680
oval:org.secpod.oval:def:37854
oval:org.secpod.oval:def:109986
...

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