CVE-2015-3193
HIGH severity · CVSS 7.5 · Information disclosure
7.5CVSS HIGH
Summary
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.
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
Confidentiality impactHigh
Integrity impactNone
Availability impactNone
Exploit probability (EPSS)25%
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Affected products we track (1)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Official patch: http://www.oracle.com/technetwork/security-advisory/cpuapr2016v3-2985753.html ↗
Additional information
- NVD record
- http://www.oracle.com/technetwork/security-advisory/cpuapr2016v3-2985753.htmlPatch
- http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.htmlPatch
- http://openssl.org/news/secadv/20151203.txtAdvisory
- http://fortiguard.com/advisory/openssl-advisory-december-2015Advisory
- http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10759Advisory
- http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10761Advisory
- http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20151204-opensslAdvisory
- http://www.fortiguard.com/advisory/openssl-advisory-december-2015Advisory