VulnerabilityModified

CVE-2015-3193

HIGH 7.5EPSS 25.1%

Does this matter?

EPSS puts the probability of exploitation in the next 30 days at 25.1%, higher than 98% of all known CVEs. Patch or mitigate before the next change window.

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 3.1: 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS: 25.14% probability · 98th percentile
Public exploits: None in Exploit-DB
CISA KEV: Not listed
Weakness: CWE-200
Affected: openssl/openssl · nodejs/node.js · canonical/ubuntu linux
Source: secalert@redhat.com

EPSS trend

EPSS 25.1% since 4 November 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.

References

http://fortiguard.com/advisory/openssl-advisory-december-2015Third Party Advisory
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10759Third Party Advisory
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10761Third Party Advisory
http://openssl.org/news/secadv/20151203.txtVendor Advisory
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20151204-opensslThird Party Advisory
http://www.fortiguard.com/advisory/openssl-advisory-december-2015Third Party Advisory
http://www.oracle.com/technetwork/security-advisory/cpuapr2016v3-2985753.htmlPatch, Third Party Advisory
http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.htmlPatch, Third Party Advisory
http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.htmlPatch, Third Party Advisory
http://www.securityfocus.com/bid/78705Third Party Advisory, VDB Entry
http://www.securityfocus.com/bid/91787Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1034294Third Party Advisory, VDB Entry
http://www.slackware.com/security/viewer.php?l=slackware-security&y=2015&m=slackware-security.539966Third Party Advisory
http://www.slackware.com/security/viewer.php?l=slackware-security&y=2015&m=slackware-security.754583Third Party Advisory
http://www.ubuntu.com/usn/USN-2830-1Third Party Advisory
https://blog.fuzzing-project.org/31-Fuzzing-Math-miscalculations-in-OpenSSLs-BN_mod_exp-CVE-2015-3193.htmlThird Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1288317Issue Tracking, Third Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf
https://git.openssl.org/?p=openssl.git%3Ba=commit%3Bh=d73cc256c8e256c32ed959456101b73ba9842f72
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05398322Third Party Advisory
https://kb.isc.org/article/AA-01438Third Party Advisory
https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA40100Third Party Advisory
http://fortiguard.com/advisory/openssl-advisory-december-2015Third Party Advisory
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10759Third Party Advisory
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10761Third Party Advisory
http://openssl.org/news/secadv/20151203.txtVendor Advisory
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20151204-opensslThird Party Advisory
http://www.fortiguard.com/advisory/openssl-advisory-december-2015Third Party Advisory
http://www.oracle.com/technetwork/security-advisory/cpuapr2016v3-2985753.htmlPatch, Third Party Advisory
http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.htmlPatch, Third Party Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.