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CVE-2017-3731

52
FAUCET Score

CVE-2017-3731 is an out-of-bounds read vulnerability affecting OpenSSL 1.1.0 and 1.0.2 on 32-bit systems, specifically when certain ciphers (CHACHA20/POLY1305 or RC4-MD5) are used with truncated SSL/TLS packets. This can lead to a denial-of-service condition due to a crash. The vulnerability has a CVSS score of 7.5 (High), indicating a network-based attack with low complexity and high impact on availability. While there is no known active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered some community discussion and media coverage, suggesting awareness within the security community.

Impacted Technologies

VendorProductVersion(s)CPE
1.1.0aCPE matchmatch criteria
cpe:2.3:a:openssl:openssl:1.1.0a:*:*:*:*:*:*:*
1.1.0bCPE matchmatch criteria
cpe:2.3:a:openssl:openssl:1.1.0b:*:*:*:*:*:*:*
1.1.0cCPE matchmatch criteria
cpe:2.3:a:openssl:openssl:1.1.0c:*:*:*:*:*:*:*
1.0.2CPE matchmatch criteria
cpe:2.3:a:openssl:openssl:1.0.2:*:*:*:*:*:*:*
1.0.2CPE matchmatch criteria
cpe:2.3:a:openssl:openssl:1.0.2:beta1:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
57.59%
Probability of exploitation in next 30 days
EPSS Percentile
99.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.5759 is in the 98th percentile among its peer group of 51,551 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (35)

oraclepatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: JBoss Core Services on RHEL 6Fixed in: jbcs-httpd24-openssl-1:1.0.2n-11.jbcs.el6
View patch
redhatpatch availablevia redhat_api
Product: JBoss Core Services on RHEL 7Fixed in: jbcs-httpd24-nghttp2-0:1.29.0-8.jbcs.el7
View patch
redhatpatch availablevia redhat_api
Product: JBoss Core Services on RHEL 7Fixed in: jbcs-httpd24-openssl-1:1.0.2n-11.jbcs.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: openssl-0:1.0.1e-48.el6_8.4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: openssl-1:1.0.1e-60.el7_3.1
View patch
redhatpatch availablevia redhat_api
Product: Text-Only JBCSFixed in: openssl
View patch
redhatpatch availablevia redhat_api
Product: JBoss Core Services on RHEL 6Fixed in: jbcs-httpd24-apache-commons-daemon-0:1.1.0-1.redhat_2.1.jbcs.el6
View patch
redhatpatch availablevia redhat_api
Product: JBoss Core Services on RHEL 6Fixed in: jbcs-httpd24-apache-commons-daemon-jsvc-1:1.1.0-1.redhat_2.jbcs.el6
View patch
redhatpatch availablevia redhat_api
Product: JBoss Core Services on RHEL 6Fixed in: jbcs-httpd24-apr-0:1.6.3-14.jbcs.el6
View patch
redhatpatch availablevia redhat_api
Product: JBoss Core Services on RHEL 6Fixed in: jbcs-httpd24-apr-util-0:1.6.1-9.jbcs.el6
View patch
redhatpatch availablevia redhat_api
Product: JBoss Core Services on RHEL 6Fixed in: jbcs-httpd24-httpd-0:2.4.29-17.jbcs.el6
View patch
redhatpatch availablevia redhat_api
Product: JBoss Core Services on RHEL 6Fixed in: jbcs-httpd24-mod_auth_kerb-0:5.4-36.jbcs.el6
View patch
redhatpatch availablevia redhat_api
Product: JBoss Core Services on RHEL 6Fixed in: jbcs-httpd24-mod_bmx-0:0.9.6-17.GA.jbcs.el6
View patch
redhatpatch availablevia redhat_api
Product: JBoss Core Services on RHEL 6Fixed in: jbcs-httpd24-mod_cluster-native-0:1.3.8-1.Final_redhat_2.jbcs.el6
View patch
redhatpatch availablevia redhat_api
Product: JBoss Core Services on RHEL 6Fixed in: jbcs-httpd24-mod_jk-0:1.2.43-1.redhat_1.jbcs.el6
View patch
redhatpatch availablevia redhat_api
Product: JBoss Core Services on RHEL 6Fixed in: jbcs-httpd24-mod_rt-0:2.4.1-19.GA.jbcs.el6
View patch
redhatpatch availablevia redhat_api
Product: JBoss Core Services on RHEL 6Fixed in: jbcs-httpd24-mod_security-0:2.9.1-23.GA.jbcs.el6
View patch
redhatpatch availablevia redhat_api
Product: JBoss Core Services on RHEL 6Fixed in: jbcs-httpd24-nghttp2-0:1.29.0-8.jbcs.el6
View patch
redhatpatch availablevia redhat_api
Product: JBoss Core Services on RHEL 7Fixed in: jbcs-httpd24-apache-commons-daemon-0:1.1.0-1.redhat_2.1.jbcs.el7
View patch
redhatpatch availablevia redhat_api
Product: JBoss Core Services on RHEL 7Fixed in: jbcs-httpd24-apache-commons-daemon-jsvc-1:1.1.0-1.redhat_2.jbcs.el7
View patch
redhatpatch availablevia redhat_api
Product: JBoss Core Services on RHEL 7Fixed in: jbcs-httpd24-apr-0:1.6.3-14.jbcs.el7
View patch
redhatpatch availablevia redhat_api
Product: JBoss Core Services on RHEL 7Fixed in: jbcs-httpd24-apr-util-0:1.6.1-9.jbcs.el7
View patch
redhatpatch availablevia redhat_api
Product: JBoss Core Services on RHEL 7Fixed in: jbcs-httpd24-httpd-0:2.4.29-17.jbcs.el7
View patch
redhatpatch availablevia redhat_api
Product: JBoss Core Services on RHEL 7Fixed in: jbcs-httpd24-mod_auth_kerb-0:5.4-36.jbcs.el7
View patch
redhatpatch availablevia redhat_api
Product: JBoss Core Services on RHEL 7Fixed in: jbcs-httpd24-mod_bmx-0:0.9.6-17.GA.jbcs.el7
View patch
redhatpatch availablevia redhat_api
Product: JBoss Core Services on RHEL 7Fixed in: jbcs-httpd24-mod_cluster-native-0:1.3.8-1.Final_redhat_2.jbcs.el7
View patch
redhatpatch availablevia redhat_api
Product: JBoss Core Services on RHEL 7Fixed in: jbcs-httpd24-mod_jk-0:1.2.43-1.redhat_1.jbcs.el7
View patch
redhatpatch availablevia redhat_api
Product: JBoss Core Services on RHEL 7Fixed in: jbcs-httpd24-mod_rt-0:2.4.1-19.GA.jbcs.el7
View patch
redhatpatch availablevia redhat_api
Product: JBoss Core Services on RHEL 7Fixed in: jbcs-httpd24-mod_security-0:2.9.1-23.GA.jbcs.el7
View patch
redhatvendor investigatingvia redhat_api
Product: Red Hat JBoss Web Server 3Fixed in: openssl
redhatno patchvia redhat_api
Product: Red Hat JBoss Enterprise Web Server 2Fixed in: openssl
redhatend of lifevia redhat_api
Product: Red Hat JBoss Enterprise Application Platform 6Fixed in: openssl
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Virtualization 3Fixed in: mingw-virt-viewer
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: OVMF

Vendor Advisories (2)

microsoft2017-May/CVE-2017-3731Important

Truncated packet could crash via OOB read

May 9, 2017
redhatCVE-2017-3731Moderate

openssl: Truncated packet could crash via OOB read

Jan 26, 2017

References

rhn.redhat.com / errata/RHSA-2017-0286.html
Third Party Advisory
access.redhat.com / errata/RHSA-2018:2185
Third Party Advisory
access.redhat.com / errata/RHSA-2018:2186
Third Party Advisory
access.redhat.com / errata/RHSA-2018:2187
Third Party Advisory
github.com / openssl/openssl/commit/00d965474b22b54e4275232bc71ee0c699c5cd21
Third Party Advisory
security.freebsd.org / advisories/FreeBSD-SA-17:02.openssl.asc
Third Party Advisory
security.gentoo.org / glsa/201702-07
Third Party Advisory
security.netapp.com / advisory/ntap-20171019-0002
Third Party Advisory
security.paloaltonetworks.com / CVE-2017-3731
Third Party Advisory
source.android.com / security/bulletin/pixel/2017-11-01
Third Party Advisory
support.hpe.com / hpsc/doc/public/display
Third Party Advisory
openssl.org / news/secadv/20170126.txt
Vendor Advisory
oracle.com / technetwork/security-advisory/cpuapr2019-5072813.html
PatchThird Party Advisory
tenable.com / security/tns-2017-04
Third Party Advisory
debian.org / security/2017/dsa-3773
Third Party Advisory
oracle.com / technetwork/security-advisory/cpujan2018-3236628.html
PatchThird Party Advisory
oracle.com / technetwork/security-advisory/cpujul2017-3236622.html
PatchThird Party Advisory
oracle.com / technetwork/security-advisory/cpuoct2017-3236626.html
PatchThird Party Advisory
securityfocus.com / bid/95813
Third Party AdvisoryVDB Entry
securitytracker.com / id/1037717
Third Party AdvisoryVDB Entry