CVE-2017-3731 — Truncated packet could crash via OOB read

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HIGH

Truncated packet could crash via OOB read

Published May 4, 2017

7.5

HIGH

CVSS 3.1

EPSS 57.32%

Description

If an SSL/TLS server or client is running on a 32-bit host, and a specific cipher is being used, then a truncated packet can cause that server or client to perform an out-of-bounds read, usually resulting in a crash. For OpenSSL 1.1.0, the crash can be triggered when using CHACHA20/POLY1305; users should upgrade to 1.1.0d. For Openssl 1.0.2, the crash can be triggered when using RC4-MD5; users who have not disabled that algorithm should update to 1.0.2k.

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

openssl-0:1.0.1e-48.el6_8.4

Fixed · RHSA-2017:0286
Red Hat Enterprise Linux 7

openssl-1:1.0.1e-60.el7_3.1

Fixed · RHSA-2017:0286
Red Hat JBoss Core Services

openssl

Fixed · RHSA-2018:2187
Red Hat Enterprise Linux 5

openssl

Not affected
Red Hat Enterprise Linux 5

openssl097a

Not affected
Red Hat Enterprise Linux 6

openssl098e

Not affected
Red Hat Enterprise Linux 7

OVMF

Will not fix
Red Hat Enterprise Linux 7

openssl098e

Not affected
Red Hat Enterprise Virtualization 3

mingw-virt-viewer

Will not fix
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

Affected
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	openssl-0:1.0.1e-48.el6_8.4	Fixed	RHSA-2017:0286
Red Hat Enterprise Linux 7	openssl-1:1.0.1e-60.el7_3.1	Fixed	RHSA-2017:0286
Red Hat JBoss Core Services	openssl	Fixed	RHSA-2018:2187
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	openssl098e	Not affected	n/a
Red Hat Enterprise Linux 7	OVMF	Will not fix	n/a
Red Hat Enterprise Linux 7	openssl098e	Not affected	n/a
Red Hat Enterprise Virtualization 3	mingw-virt-viewer	Will not fix	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	Affected	n/a
Red Hat JBoss Web Server 3	openssl	Fix deferred	n/a

Remediation

No remediation recorded yet.

Metrics

57.32% 0.57322

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

EPSS probability 0.57322

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 (28 key points)

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

Date	Score	Percentile	Model
Oct 1, 2026	57.32% (0.57322)	99.05th	v5 (v2026.06.15)
Jun 15, 2026	57.59% (0.57595)	98.95th	v5 (v2026.06.15)
May 24, 2026	9.42% (0.09416)	92.90th	v4 (v2025.03.14)
Mar 22, 2026	12.61% (0.12609)	93.88th	v4 (v2025.03.14)
Jan 16, 2026	11.26% (0.11263)	93.30th	v4 (v2025.03.14)
Dec 28, 2025	14.95% (0.14955)	94.33th	v4 (v2025.03.14)
Dec 27, 2025	10.29% (0.10291)	92.96th	v4 (v2025.03.14)
Dec 1, 2025	14.95% (0.14955)	94.32th	v4 (v2025.03.14)
Oct 28, 2025	11.26% (0.11263)	93.19th	v4 (v2025.03.14)
Oct 27, 2025	7.62% (0.07620)	91.46th	v4 (v2025.03.14)
Oct 1, 2025	11.26% (0.11263)	93.29th	v4 (v2025.03.14)
Jul 30, 2025	7.55% (0.07549)	91.42th	v4 (v2025.03.14)
Jul 10, 2025	11.16% (0.11164)	93.15th	v4 (v2025.03.14)
Mar 30, 2025	14.90% (0.14905)	93.97th	v4 (v2025.03.14)
Mar 29, 2025	17.64% (0.17642)	91.92th	v4 (v2025.03.14)
Mar 17, 2025	14.90% (0.14905)	94.03th	v4 (v2025.03.14)
Dec 17, 2024	5.57% (0.05568)	93.14th	v3 (v2023.03.01)
Aug 8, 2023	4.55% (0.04552)	91.42th	v3 (v2023.03.01)
Jun 30, 2023	5.29% (0.05292)	91.93th	v3 (v2023.03.01)
May 8, 2023	4.74% (0.04740)	91.41th	v3 (v2023.03.01)
Mar 7, 2023	4.23% (0.04228)	90.92th	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	4.27% (0.04270)	74.64th	v1
Jan 6, 2022	4.27% (0.04270)	74.43th	v1
Sep 1, 2021	4.27% (0.04270)	83.53th	v1
Apr 14, 2021	4.27% (0.04270)	0.00th	v1

Weaknesses (1)

CWE-125

Out-of-bounds Read

References (24)

http://rhn.redhat.com/errata/RHSA-2017-0286.html
vendor-advisoryx_refsource_REDHATThird Party Advisory
http://www.debian.org/security/2017/dsa-3773
vendor-advisoryx_refsource_DEBIANThird Party Advisory
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/95813
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/security/cve/CVE-2017-3731
Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1416852
Issue Tracking
https://github.com/openssl/openssl/commit/00d965474b22b54e4275232bc71ee0c699c5cd21
x_refsource_MISCThird Party Advisory
https://nvd.nist.gov/vuln/detail/CVE-2017-3731
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://security.netapp.com/advisory/ntap-20171019-0002/
x_refsource_CONFIRMThird Party Advisory
https://security.paloaltonetworks.com/CVE-2017-3731
x_refsource_CONFIRMThird Party Advisory
https://source.android.com/security/bulletin/pixel/2017-11-01
x_refsource_CONFIRMThird 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-2017-3731
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://rhn.redhat.com/errata/RHSA-2017-0286.html		vendor-advisoryx_refsource_REDHATThird Party Advisory
http://www.debian.org/security/2017/dsa-3773		vendor-advisoryx_refsource_DEBIANThird Party Advisory
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/95813		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/security/cve/CVE-2017-3731		Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1416852		Issue Tracking
https://github.com/openssl/openssl/commit/00d965474b22b54e4275232bc71ee0c699c5cd21		x_refsource_MISCThird Party Advisory
https://nvd.nist.gov/vuln/detail/CVE-2017-3731
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://security.netapp.com/advisory/ntap-20171019-0002/		x_refsource_CONFIRMThird Party Advisory
https://security.paloaltonetworks.com/CVE-2017-3731		x_refsource_CONFIRMThird Party Advisory
https://source.android.com/security/bulletin/pixel/2017-11-01		x_refsource_CONFIRMThird 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-2017-3731
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