CVE-2017-3732 — BN_mod_exp may produce incorrect results on x86_64

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MEDIUM

BN_mod_exp may produce incorrect results on x86_64

Published May 4, 2017

5.9

MEDIUM

CVSS 3.1

EPSS 15.40%

Description

There is a carry propagating bug in the x86_64 Montgomery squaring procedure in OpenSSL 1.0.2 before 1.0.2k and 1.1.0 before 1.1.0d. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem.

Affected products

Vendor OpenSSL Product OpenSSL Default
n/a
- Version
  openssl-1.0.2
  Status
  affected
  Constraints
  -
- Version
  openssl-1.0.2a
  Status
  affected
  Constraints
  -
- Version
  openssl-1.0.2b
  Status
  affected
  Constraints
  -
- Version
  openssl-1.0.2c
  Status
  affected
  Constraints
  -
- Version
  openssl-1.0.2d
  Status
  affected
  Constraints
  -
- Version
  openssl-1.0.2e
  Status
  affected
  Constraints
  -
- Version
  openssl-1.0.2f
  Status
  affected
  Constraints
  -
- Version
  openssl-1.0.2g
  Status
  affected
  Constraints
  -
- Version
  openssl-1.0.2h
  Status
  affected
  Constraints
  -
- Version
  openssl-1.0.2i
  Status
  affected
  Constraints
  -
- Version
  openssl-1.0.2j
  Status
  affected
  Constraints
  -
- Version
  openssl-1.1.0
  Status
  affected
  Constraints
  -
- Version
  openssl-1.1.0a
  Status
  affected
  Constraints
  -
- Version
  openssl-1.1.0b
  Status
  affected
  Constraints
  -
- Version
  openssl-1.1.0c
  Status
  affected
  Constraints
  -

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

OpenSSL

n/a

Version	Status	Constraints
openssl-1.0.2	affected	-
openssl-1.0.2a	affected	-
openssl-1.0.2b	affected	-
openssl-1.0.2c	affected	-
openssl-1.0.2d	affected	-
openssl-1.0.2e	affected	-
openssl-1.0.2f	affected	-
openssl-1.0.2g	affected	-
openssl-1.0.2h	affected	-
openssl-1.0.2i	affected	-
openssl-1.0.2j	affected	-
openssl-1.1.0	affected	-
openssl-1.1.0a	affected	-
openssl-1.1.0b	affected	-
openssl-1.1.0c	affected	-

JBoss Core Services on RHEL 6

jbcs-httpd24-apache-commons-daemon-0:1.1.0-1.redhat_2.1.jbcs.el6

Fixed · RHSA-2018:2186
JBoss Core Services on RHEL 6

jbcs-httpd24-apache-commons-daemon-jsvc-1:1.1.0-1.redhat_2.jbcs.el6

Fixed · RHSA-2018:2186
JBoss Core Services on RHEL 6

jbcs-httpd24-apr-0:1.6.3-14.jbcs.el6

Fixed · RHSA-2018:2186
JBoss Core Services on RHEL 6

jbcs-httpd24-apr-util-0:1.6.1-9.jbcs.el6

Fixed · RHSA-2018:2186
JBoss Core Services on RHEL 6

jbcs-httpd24-httpd-0:2.4.29-17.jbcs.el6

Fixed · RHSA-2018:2186
JBoss Core Services on RHEL 6

jbcs-httpd24-mod_auth_kerb-0:5.4-36.jbcs.el6

Fixed · RHSA-2018:2186
JBoss Core Services on RHEL 6

jbcs-httpd24-mod_bmx-0:0.9.6-17.GA.jbcs.el6

Fixed · RHSA-2018:2186
JBoss Core Services on RHEL 6

jbcs-httpd24-mod_cluster-native-0:1.3.8-1.Final_redhat_2.jbcs.el6

Fixed · RHSA-2018:2186
JBoss Core Services on RHEL 6

jbcs-httpd24-mod_jk-0:1.2.43-1.redhat_1.jbcs.el6

Fixed · RHSA-2018:2186
JBoss Core Services on RHEL 6

jbcs-httpd24-mod_rt-0:2.4.1-19.GA.jbcs.el6

Fixed · RHSA-2018:2186
JBoss Core Services on RHEL 6

jbcs-httpd24-mod_security-0:2.9.1-23.GA.jbcs.el6

Fixed · RHSA-2018:2186
JBoss Core Services on RHEL 6

jbcs-httpd24-nghttp2-0:1.29.0-8.jbcs.el6

Fixed · RHSA-2018:2186
JBoss Core Services on RHEL 6

jbcs-httpd24-openssl-1:1.0.2n-11.jbcs.el6

Fixed · RHSA-2018:2186
JBoss Core Services on RHEL 7

jbcs-httpd24-apache-commons-daemon-0:1.1.0-1.redhat_2.1.jbcs.el7

Fixed · RHSA-2018:2185
JBoss Core Services on RHEL 7

jbcs-httpd24-apache-commons-daemon-jsvc-1:1.1.0-1.redhat_2.jbcs.el7

Fixed · RHSA-2018:2185
JBoss Core Services on RHEL 7

jbcs-httpd24-apr-0:1.6.3-14.jbcs.el7

Fixed · RHSA-2018:2185
JBoss Core Services on RHEL 7

jbcs-httpd24-apr-util-0:1.6.1-9.jbcs.el7

Fixed · RHSA-2018:2185
JBoss Core Services on RHEL 7

jbcs-httpd24-httpd-0:2.4.29-17.jbcs.el7

Fixed · RHSA-2018:2185
JBoss Core Services on RHEL 7

jbcs-httpd24-mod_auth_kerb-0:5.4-36.jbcs.el7

Fixed · RHSA-2018:2185
JBoss Core Services on RHEL 7

jbcs-httpd24-mod_bmx-0:0.9.6-17.GA.jbcs.el7

Fixed · RHSA-2018:2185
JBoss Core Services on RHEL 7

jbcs-httpd24-mod_cluster-native-0:1.3.8-1.Final_redhat_2.jbcs.el7

Fixed · RHSA-2018:2185
JBoss Core Services on RHEL 7

jbcs-httpd24-mod_jk-0:1.2.43-1.redhat_1.jbcs.el7

Fixed · RHSA-2018:2185
JBoss Core Services on RHEL 7

jbcs-httpd24-mod_rt-0:2.4.1-19.GA.jbcs.el7

Fixed · RHSA-2018:2185
JBoss Core Services on RHEL 7

jbcs-httpd24-mod_security-0:2.9.1-23.GA.jbcs.el7

Fixed · RHSA-2018:2185
JBoss Core Services on RHEL 7

jbcs-httpd24-nghttp2-0:1.29.0-8.jbcs.el7

Fixed · RHSA-2018:2185
JBoss Core Services on RHEL 7

jbcs-httpd24-openssl-1:1.0.2n-11.jbcs.el7

Fixed · RHSA-2018:2185
Red Hat Enterprise Linux 6 Supplementary

java-1.8.0-ibm-1:1.8.0.5.20-1jpp.1.el6_10

Fixed · RHSA-2018:2575
Red Hat Enterprise Linux 7 Supplementary

java-1.8.0-ibm-1:1.8.0.5.20-1jpp.1.el7

Fixed · RHSA-2018:2568
Red Hat JBoss Core Services

openssl

Fixed · RHSA-2018:2187
Red Hat Satellite 5.8

java-1.8.0-ibm-1:1.8.0.5.20-1jpp.1.el6_10

Fixed · RHSA-2018:2713
Red Hat Enterprise Linux 5

openssl

Not affected
Red Hat Enterprise Linux 5

openssl097a

Not affected
Red Hat Enterprise Linux 6

openssl

Not affected
Red Hat Enterprise Linux 6

openssl098e

Not affected
Red Hat Enterprise Linux 7

OVMF

Not affected
Red Hat Enterprise Linux 7

openssl

Not affected
Red Hat Enterprise Linux 7

openssl098e

Not affected
Red Hat Enterprise Virtualization 3

mingw-virt-viewer

Not affected
Red Hat JBoss Enterprise Application Platform 5

openssl

Not affected
Red Hat JBoss Enterprise Application Platform 6

openssl

Will not fix
Red Hat JBoss Enterprise Web Server 1

openssl

Not affected
Red Hat JBoss Enterprise Web Server 2

openssl

Will not fix
Red Hat JBoss Web Server 3

openssl

Fix deferred

Product	Package	State	Advisory
JBoss Core Services on RHEL 6	jbcs-httpd24-apache-commons-daemon-0:1.1.0-1.redhat_2.1.jbcs.el6	Fixed	RHSA-2018:2186
JBoss Core Services on RHEL 6	jbcs-httpd24-apache-commons-daemon-jsvc-1:1.1.0-1.redhat_2.jbcs.el6	Fixed	RHSA-2018:2186
JBoss Core Services on RHEL 6	jbcs-httpd24-apr-0:1.6.3-14.jbcs.el6	Fixed	RHSA-2018:2186
JBoss Core Services on RHEL 6	jbcs-httpd24-apr-util-0:1.6.1-9.jbcs.el6	Fixed	RHSA-2018:2186
JBoss Core Services on RHEL 6	jbcs-httpd24-httpd-0:2.4.29-17.jbcs.el6	Fixed	RHSA-2018:2186
JBoss Core Services on RHEL 6	jbcs-httpd24-mod_auth_kerb-0:5.4-36.jbcs.el6	Fixed	RHSA-2018:2186
JBoss Core Services on RHEL 6	jbcs-httpd24-mod_bmx-0:0.9.6-17.GA.jbcs.el6	Fixed	RHSA-2018:2186
JBoss Core Services on RHEL 6	jbcs-httpd24-mod_cluster-native-0:1.3.8-1.Final_redhat_2.jbcs.el6	Fixed	RHSA-2018:2186
JBoss Core Services on RHEL 6	jbcs-httpd24-mod_jk-0:1.2.43-1.redhat_1.jbcs.el6	Fixed	RHSA-2018:2186
JBoss Core Services on RHEL 6	jbcs-httpd24-mod_rt-0:2.4.1-19.GA.jbcs.el6	Fixed	RHSA-2018:2186
JBoss Core Services on RHEL 6	jbcs-httpd24-mod_security-0:2.9.1-23.GA.jbcs.el6	Fixed	RHSA-2018:2186
JBoss Core Services on RHEL 6	jbcs-httpd24-nghttp2-0:1.29.0-8.jbcs.el6	Fixed	RHSA-2018:2186
JBoss Core Services on RHEL 6	jbcs-httpd24-openssl-1:1.0.2n-11.jbcs.el6	Fixed	RHSA-2018:2186
JBoss Core Services on RHEL 7	jbcs-httpd24-apache-commons-daemon-0:1.1.0-1.redhat_2.1.jbcs.el7	Fixed	RHSA-2018:2185
JBoss Core Services on RHEL 7	jbcs-httpd24-apache-commons-daemon-jsvc-1:1.1.0-1.redhat_2.jbcs.el7	Fixed	RHSA-2018:2185
JBoss Core Services on RHEL 7	jbcs-httpd24-apr-0:1.6.3-14.jbcs.el7	Fixed	RHSA-2018:2185
JBoss Core Services on RHEL 7	jbcs-httpd24-apr-util-0:1.6.1-9.jbcs.el7	Fixed	RHSA-2018:2185
JBoss Core Services on RHEL 7	jbcs-httpd24-httpd-0:2.4.29-17.jbcs.el7	Fixed	RHSA-2018:2185
JBoss Core Services on RHEL 7	jbcs-httpd24-mod_auth_kerb-0:5.4-36.jbcs.el7	Fixed	RHSA-2018:2185
JBoss Core Services on RHEL 7	jbcs-httpd24-mod_bmx-0:0.9.6-17.GA.jbcs.el7	Fixed	RHSA-2018:2185
JBoss Core Services on RHEL 7	jbcs-httpd24-mod_cluster-native-0:1.3.8-1.Final_redhat_2.jbcs.el7	Fixed	RHSA-2018:2185
JBoss Core Services on RHEL 7	jbcs-httpd24-mod_jk-0:1.2.43-1.redhat_1.jbcs.el7	Fixed	RHSA-2018:2185
JBoss Core Services on RHEL 7	jbcs-httpd24-mod_rt-0:2.4.1-19.GA.jbcs.el7	Fixed	RHSA-2018:2185
JBoss Core Services on RHEL 7	jbcs-httpd24-mod_security-0:2.9.1-23.GA.jbcs.el7	Fixed	RHSA-2018:2185
JBoss Core Services on RHEL 7	jbcs-httpd24-nghttp2-0:1.29.0-8.jbcs.el7	Fixed	RHSA-2018:2185
JBoss Core Services on RHEL 7	jbcs-httpd24-openssl-1:1.0.2n-11.jbcs.el7	Fixed	RHSA-2018:2185
Red Hat Enterprise Linux 6 Supplementary	java-1.8.0-ibm-1:1.8.0.5.20-1jpp.1.el6_10	Fixed	RHSA-2018:2575
Red Hat Enterprise Linux 7 Supplementary	java-1.8.0-ibm-1:1.8.0.5.20-1jpp.1.el7	Fixed	RHSA-2018:2568
Red Hat JBoss Core Services	openssl	Fixed	RHSA-2018:2187
Red Hat Satellite 5.8	java-1.8.0-ibm-1:1.8.0.5.20-1jpp.1.el6_10	Fixed	RHSA-2018:2713
Red Hat Enterprise Linux 5	openssl	Not affected	n/a
Red Hat Enterprise Linux 5	openssl097a	Not affected	n/a
Red Hat Enterprise Linux 6	openssl	Not affected	n/a
Red Hat Enterprise Linux 6	openssl098e	Not affected	n/a
Red Hat Enterprise Linux 7	OVMF	Not affected	n/a
Red Hat Enterprise Linux 7	openssl	Not affected	n/a
Red Hat Enterprise Linux 7	openssl098e	Not affected	n/a
Red Hat Enterprise Virtualization 3	mingw-virt-viewer	Not affected	n/a
Red Hat JBoss Enterprise Application Platform 5	openssl	Not affected	n/a
Red Hat JBoss Enterprise Application Platform 6	openssl	Will not fix	n/a
Red Hat JBoss Enterprise Web Server 1	openssl	Not affected	n/a
Red Hat JBoss Enterprise Web Server 2	openssl	Will not fix	n/a
Red Hat JBoss Web Server 3	openssl	Fix deferred	n/a

Remediation

No remediation recorded yet.

Metrics

15.40% 0.15400

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.

EPSS probability 0.15400

Score over time

2021–2026

EPSS v1
EPSS v2
EPSS v3
EPSS v4
EPSS v5

Percentile over time

EPSS v1
EPSS v2
EPSS v3
EPSS v4
EPSS v5

Table of values (29 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 1, 2026	15.40% (0.15400)	96.69th	v5 (v2026.06.15)
Jun 15, 2026	15.93% (0.15934)	96.47th	v5 (v2026.06.15)
Apr 9, 2026	5.21% (0.05205)	89.93th	v4 (v2025.03.14)
Dec 28, 2025	7.58% (0.07578)	91.53th	v4 (v2025.03.14)
Dec 27, 2025	5.37% (0.05366)	89.82th	v4 (v2025.03.14)
Nov 30, 2025	6.98% (0.06978)	91.08th	v4 (v2025.03.14)
Oct 28, 2025	4.75% (0.04750)	88.93th	v4 (v2025.03.14)
Oct 27, 2025	3.72% (0.03723)	87.49th	v4 (v2025.03.14)
Oct 9, 2025	4.75% (0.04750)	88.89th	v4 (v2025.03.14)
Oct 4, 2025	6.90% (0.06897)	91.01th	v4 (v2025.03.14)
Sep 22, 2025	5.44% (0.05439)	89.79th	v4 (v2025.03.14)
Jul 30, 2025	3.72% (0.03723)	87.54th	v4 (v2025.03.14)
Mar 30, 2025	4.74% (0.04736)	88.39th	v4 (v2025.03.14)
Mar 29, 2025	9.88% (0.09883)	88.24th	v4 (v2025.03.14)
Mar 20, 2025	5.72% (0.05718)	89.62th	v4 (v2025.03.14)
Mar 17, 2025	7.68% (0.07679)	91.28th	v4 (v2025.03.14)
Dec 12, 2024	0.51% (0.00510)	77.38th	v3 (v2023.03.01)
Feb 8, 2024	0.51% (0.00510)	75.91th	v3 (v2023.03.01)
Aug 8, 2023	0.51% (0.00510)	73.51th	v3 (v2023.03.01)
Jun 30, 2023	0.50% (0.00503)	73.16th	v3 (v2023.03.01)
May 8, 2023	0.54% (0.00543)	73.93th	v3 (v2023.03.01)
Mar 7, 2023	0.82% (0.00818)	79.22th	v3 (v2023.03.01)
Mar 6, 2023	4.72% (0.04720)	89.23th	v2 (v2022.01.01)
Apr 1, 2022	4.72% (0.04720)	88.14th	v2 (v2022.01.01)
Feb 4, 2022	4.72% (0.04720)	74.52th	v2 (v2022.01.01)
Feb 3, 2022	3.88% (0.03876)	72.87th	v1
Jan 6, 2022	3.88% (0.03876)	72.62th	v1
Sep 1, 2021	3.88% (0.03876)	83.07th	v1
Apr 14, 2021	3.88% (0.03876)	0.00th	v1

Weaknesses (1)

CWE-200

Exposure of Sensitive Information

References (22)

http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html
x_refsource_CONFIRMPatchThird Party Advisory
http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html
x_refsource_CONFIRMPatchThird Party Advisory
http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
x_refsource_CONFIRMPatchThird Party Advisory
http://www.securityfocus.com/bid/95814
vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1037717
vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
https://access.redhat.com/errata/RHSA-2018:2185
vendor-advisoryx_refsource_REDHATThird Party Advisory
https://access.redhat.com/errata/RHSA-2018:2186
vendor-advisoryx_refsource_REDHATThird Party Advisory
https://access.redhat.com/errata/RHSA-2018:2187
vendor-advisoryx_refsource_REDHATThird Party Advisory
https://access.redhat.com/errata/RHSA-2018:2568
vendor-advisoryx_refsource_REDHATThird Party Advisory
https://access.redhat.com/errata/RHSA-2018:2575
vendor-advisoryx_refsource_REDHATThird Party Advisory
https://access.redhat.com/errata/RHSA-2018:2713
vendor-advisoryx_refsource_REDHATThird Party Advisory
https://access.redhat.com/security/cve/CVE-2017-3732
Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1416856
Issue Tracking
https://github.com/openssl/openssl/commit/a59b90bf491410f1f2bc4540cc21f1980fd14c5b
x_refsource_MISCPatch
https://nvd.nist.gov/vuln/detail/CVE-2017-3732
https://security.FreeBSD.org/advisories/FreeBSD-SA-17:02.openssl.asc
vendor-advisoryx_refsource_FREEBSDThird Party Advisory
https://security.gentoo.org/glsa/201702-07
vendor-advisoryx_refsource_GENTOOThird Party Advisory
https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03838en_us
x_refsource_CONFIRMThird Party Advisory
https://www.cve.org/CVERecord?id=CVE-2017-3732
https://www.openssl.org/news/secadv/20170126.txt
x_refsource_CONFIRMVendor Advisory
https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html
x_refsource_MISCPatchThird Party Advisory
https://www.tenable.com/security/tns-2017-04
x_refsource_CONFIRMThird Party Advisory

Link	Providers	Tags
http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html		x_refsource_CONFIRMPatchThird Party Advisory
http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html		x_refsource_CONFIRMPatchThird Party Advisory
http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html		x_refsource_CONFIRMPatchThird Party Advisory
http://www.securityfocus.com/bid/95814		vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1037717		vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
https://access.redhat.com/errata/RHSA-2018:2185		vendor-advisoryx_refsource_REDHATThird Party Advisory
https://access.redhat.com/errata/RHSA-2018:2186		vendor-advisoryx_refsource_REDHATThird Party Advisory
https://access.redhat.com/errata/RHSA-2018:2187		vendor-advisoryx_refsource_REDHATThird Party Advisory
https://access.redhat.com/errata/RHSA-2018:2568		vendor-advisoryx_refsource_REDHATThird Party Advisory
https://access.redhat.com/errata/RHSA-2018:2575		vendor-advisoryx_refsource_REDHATThird Party Advisory
https://access.redhat.com/errata/RHSA-2018:2713		vendor-advisoryx_refsource_REDHATThird Party Advisory
https://access.redhat.com/security/cve/CVE-2017-3732		Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1416856		Issue Tracking
https://github.com/openssl/openssl/commit/a59b90bf491410f1f2bc4540cc21f1980fd14c5b		x_refsource_MISCPatch
https://nvd.nist.gov/vuln/detail/CVE-2017-3732
https://security.FreeBSD.org/advisories/FreeBSD-SA-17:02.openssl.asc		vendor-advisoryx_refsource_FREEBSDThird Party Advisory
https://security.gentoo.org/glsa/201702-07		vendor-advisoryx_refsource_GENTOOThird Party Advisory
https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03838en_us		x_refsource_CONFIRMThird Party Advisory
https://www.cve.org/CVERecord?id=CVE-2017-3732
https://www.openssl.org/news/secadv/20170126.txt		x_refsource_CONFIRMVendor Advisory
https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html		x_refsource_MISCPatchThird Party Advisory
https://www.tenable.com/security/tns-2017-04		x_refsource_CONFIRMThird Party Advisory