← Vulnerability feed

Vulnerability record · CVE-2015-3193 · published 6 December 2015

CVE-2015-3193: Openssl information exposure vulnerability

OOpenssl · Openssl

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.

7.5 CVSS 3.1 High EPSS 25% · top 2.1% CWE-200 · Information exposure
7.5CVSS 3.1 base score, v2 5.0
25%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
44References
17 Jun 2026Last modified by NVD

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/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
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 Third Party Advisory
http://openssl.org/news/secadv/20151203.txt Vendor 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 Third Party Advisory
http://www.oracle.com/technetwork/security-advisory/cpuapr2016v3-2985753.html PatchThird Party Advisory
http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html PatchThird Party Advisory
http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html PatchThird Party Advisory
http://www.securityfocus.com/bid/78705 Third Party AdvisoryVDB Entry
http://www.securityfocus.com/bid/91787 Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1034294 Third Party AdvisoryVDB Entry
http://www.slackware.com/security/viewer.php?l=slackware-security&y=2015&m=slackware-security.539966 Third Party Advisory
http://www.slackware.com/security/viewer.php?l=slackware-security&y=2015&m=slackware-security.754583 Third Party Advisory
http://www.ubuntu.com/usn/USN-2830-1 Third Party Advisory
https://blog.fuzzing-project.org/31-Fuzzing-Math-miscalculations-in-OpenSSLs-BN_mod_exp-CVE-2015-3193.html Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1288317 Issue TrackingThird 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-c05398322 Third Party Advisory
https://kb.isc.org/article/AA-01438 Third Party Advisory
https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA40100 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 Third Party Advisory
http://openssl.org/news/secadv/20151203.txt Vendor 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 Third Party Advisory
http://www.oracle.com/technetwork/security-advisory/cpuapr2016v3-2985753.html PatchThird Party Advisory
http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html PatchThird Party Advisory
http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html PatchThird Party Advisory
http://www.securityfocus.com/bid/78705 Third Party AdvisoryVDB Entry
http://www.securityfocus.com/bid/91787 Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1034294 Third Party AdvisoryVDB Entry
http://www.slackware.com/security/viewer.php?l=slackware-security&y=2015&m=slackware-security.539966 Third Party Advisory
http://www.slackware.com/security/viewer.php?l=slackware-security&y=2015&m=slackware-security.754583 Third Party Advisory
http://www.ubuntu.com/usn/USN-2830-1 Third Party Advisory
https://blog.fuzzing-project.org/31-Fuzzing-Math-miscalculations-in-OpenSSLs-BN_mod_exp-CVE-2015-3193.html Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1288317 Issue TrackingThird Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf

Track CVE-2015-3193 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2020-11651SaltStack Salt master authentication bypass in ClearFuncsSaltStack Salt before 2019.2.4 and 3000 before 3000.2 fails to properly validate method calls in the salt-master ClearFuncs class, allowing remote un…KEVEPSS 97%analysed9.8CVE-2020-7247OpenSMTPD MAIL FROM command injection allows remote root code executionOpenSMTPD 6.6, as shipped in OpenBSD 6.6 and other products, mishandles input validation in smtp_mailaddr in smtp_session.c, returning an incorrect v…KEVEPSS 99%analysed9.8CVE-2019-11043PHP-FPM buffer overflow enables remote code executionPHP-FPM in certain configurations writes past allocated buffers into FCGI protocol data space, an out-of-bounds write (CWE-787, CWE-120). It affects …KEVEPSS 100%analysed9.8CVE-2019-16928Exim heap buffer overflow in string_vformat via long EHLO commandExim 4.92 through 4.92.2 contains a heap-based buffer overflow in string_vformat in string.c triggered by a long EHLO command, allowing remote code e…KEVEPSS 42%analysed9.8CVE-2019-10149Exim MTA improper recipient validation leads to remote command executionExim versions 4.87 through 4.91 fail to properly validate recipient addresses in the deliver_message() function in /src/deliver.c, allowing command i…KEVEPSS 100%analysed9.8CVE-2018-6789Exim SMTP base64d buffer overflow allows remote code executionExim before 4.90.1 contains a buffer overflow in the base64d function of its SMTP listener. A handcrafted message can trigger the overflow, and the f…KEVEPSS 82%analysed9.8CVE-2016-8735Apache Tomcat JmxRemoteLifecycleListener remote code executionApache Tomcat's JmxRemoteLifecycleListener was not updated to match the Oracle CVE-2016-3427 credential-type fix, leaving a deserialization weakness …KEVEPSS 90%analysed9.8CVE-2016-3427Oracle Java SE JMX Improper Access Control VulnerabilityCVE-2016-3427 is an unspecified vulnerability in Oracle Java SE 6u113, 7u99, 8u77, Java SE Embedded 8u77, and JRockit R28.3.9, reached through vector…KEVEPSS 92%analysed

Source: NIST National Vulnerability Database (record CVE-2015-3193), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.