High severity · published Dec 6, 2015
CVE-2015-3193
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…
7.5
CVSS
25.1%
EPSS
No
On KEV
Description
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)25.1% · higher than 98% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NO
Node.js · Nodejs
4.0.0 through 4.1.2; 4.2.0 before 4.2.3; 5.0.0 before 5.1.1 · source: NVD
OP
Openssl · Openssl
1.0.2; 1.0.2a; 1.0.2b; 1.0.2c; 1.0.2d · source: NVD
UL
Ubuntu Linux · Canonical
12.04; 14.04; 15.04; 15.10 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2015-3193
CVE.org
https://www.cve.org/CVERecord?id=CVE-2015-3193
Third Party Advisory
http://fortiguard.com/advisory/openssl-advisory-december-2015
Third Party Advisory
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10759
Third Party Advisory
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10761
Vendor Advisory
http://openssl.org/news/secadv/20151203.txt
Third Party Advisory
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20151204-openssl
Third Party Advisory
http://www.fortiguard.com/advisory/openssl-advisory-december-2015
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