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CVE-2017-3737

65
FAUCET Score

CVE-2017-3737 affects OpenSSL versions 1.0.2b through 1.0.2m, including Debian distributions, where a bug allows SSL_read() or SSL_write() to bypass encryption after a fatal handshake error, directly exposing data from the TLS record layer if an application bug is also present. This vulnerability is rated Medium (CVSS 5.9) due to its network attack vector and high confidentiality impact, despite requiring high attack complexity because of the necessary application flaw. Although there are no known public exploits or evidence of active exploitation, its EPSS score suggests a higher-than-average predicted exploitability, and it has received community discussion and limited media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
1.0.2bCPE matchmatch criteria
cpe:2.3:a:openssl:openssl:1.0.2b:*:*:*:*:*:*:*
1.0.2cCPE matchmatch criteria
cpe:2.3:a:openssl:openssl:1.0.2c:*:*:*:*:*:*:*
1.0.2dCPE matchmatch criteria
cpe:2.3:a:openssl:openssl:1.0.2d:*:*:*:*:*:*:*
1.0.2eCPE matchmatch criteria
cpe:2.3:a:openssl:openssl:1.0.2e:*:*:*:*:*:*:*
1.0.2fCPE matchmatch criteria
cpe:2.3:a:openssl:openssl:1.0.2f:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.9MEDIUM

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
2.2
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
78.67%
Probability of exploitation in next 30 days
EPSS Percentile
99.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.7867 is in the 100th percentile among its peer group of 19,955 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

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

Remediation

Patch Available

Vendor Patches (31)

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 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-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
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 7Fixed in: openssl-1:1.0.2k-12.el7
View patch
redhatpatch availablevia redhat_api
Product: Text-Only JBCSFixed in: openssl
View patch
redhatno patchvia redhat_api
Product: Red Hat JBoss Web Server 3Fixed 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 JBoss Enterprise Web Server 2Fixed in: openssl

Vendor Advisories (1)

redhatCVE-2017-3737Moderate

openssl: Read/write after SSL object in error state

Dec 7, 2017

References

access.redhat.com / errata/RHSA-2018:0998
access.redhat.com / errata/RHSA-2018:2185
access.redhat.com / errata/RHSA-2018:2186
access.redhat.com / errata/RHSA-2018:2187
cert-portal.siemens.com / productcert/pdf/ssa-179516.pdf
github.com / openssl/openssl/commit/898fb884b706aaeb283de4812340bb0bde8476dc
security.freebsd.org / advisories/FreeBSD-SA-17:12.openssl.asc
Third Party Advisory
security.gentoo.org / glsa/201712-03
Third Party Advisory
security.netapp.com / advisory/ntap-20171208-0001
Third Party Advisory
security.netapp.com / advisory/ntap-20180117-0002
security.netapp.com / advisory/ntap-20180419-0002
debian.org / security/2017/dsa-4065
Third Party Advisory
digitalmunition.me / 2017/12/cve-2017-3737-openssl-security-bypass-vulnerability
Third Party Advisory
openssl.org / news/secadv/20171207.txt
Vendor Advisory
oracle.com / technetwork/security-advisory/cpujul2019-5072835.html
tenable.com / security/tns-2017-16
oracle.com / technetwork/security-advisory/cpuapr2018-3678067.html
oracle.com / technetwork/security-advisory/cpujan2018-3236628.html
oracle.com / technetwork/security-advisory/cpujul2018-4258247.html
securityfocus.com / bid/102103
Third Party AdvisoryVDB Entry
securitytracker.com / id/1039978
Third Party AdvisoryVDB Entry