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Fencer Vulns
medium 5.9

CVE-2017-3737 json

OpenSSL 1.0.2 (starting from version 1.0.2b) introduced an "error state" mechanism.

published 2017-12-07 8 y ago modified 2026-06-17 4 mo ago also EUVD-2017-12854

cvss
5.9
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
78.7%
EPSS 78.7% chance of exploitation in 30 days, percentile 99.5%
public exploits
0
none known

Summary

OpenSSL 1.0.2 (starting from version 1.0.2b) introduced an "error state" mechanism. The intent was that if a fatal error occurred during a handshake then OpenSSL would move into the error state and would immediately fail if you attempted to continue the handshake. This works as designed for the explicit handshake functions (SSL_do_handshake(), SSL_accept() and SSL_connect()), however due to a bug it does not work correctly if SSL_read() or SSL_write() is called directly. In that scenario, if the handshake fails then a fatal error will be returned in the initial function call. If SSL_read()/SSL_write() is subsequently called by the application for the same SSL object then it will succeed and the data is passed without being decrypted/encrypted directly from the SSL/TLS record layer. In order to exploit this issue an application bug would have to be present that resulted in a call to SSL_read()/SSL_write() being issued after having already received a fatal error. OpenSSL version 1.0.2b-1.0.2m are affected. Fixed in OpenSSL 1.0.2n. OpenSSL 1.1.0 is not affected.

Patch / fix

  • openssl Debian 14, Debian 13, Debian 12 1.1.0b-2

debian advisories DEBIAN-CVE-2017-3737

  • openssl Ubuntu 16.04 LTS 1.0.2g-1ubuntu4.10

ubuntu advisories UBUNTU-CVE-2017-3737

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • jbcs-httpd24-apr jboss core services 1 1.6.3-14.jbcs.el7
  • jbcs-httpd24-httpd jboss core services 1 2.4.29-17.jbcs.el7
  • jbcs-httpd24-mod_jk jboss core services 1 1.2.43-1.redhat_1.jbcs.el7
  • jbcs-httpd24-mod_rt jboss core services 1 2.4.1-19.GA.jbcs.el7
  • jbcs-httpd24-mod_bmx jboss core services 1 0.9.6-17.GA.jbcs.el7
  • jbcs-httpd24-mod_ssl jboss core services 1 1:2.4.29-17.jbcs.el7
  • jbcs-httpd24-nghttp2 jboss core services 1 1.29.0-8.jbcs.el7
  • jbcs-httpd24-openssl jboss core services 1 1:1.0.2n-11.jbcs.el7

red hat advisories RHSA-2018:2185RHSA-2018:2186RHSA-2018:0998

  • openssl SLES for SAP 12 SP3, SLES for SAP 12 SP2, SLES for Raspberry Pi 12 SP2 +6 more 1.0.2j-60.20.2

suse advisories SUSE-SU-2017:3343-1

  • openssl-1_0_0 openSUSE Tumbleweed 1.0.2u-6.2

opensuse advisories openSUSE-SU-2024:11126-1

  • openssl Alpine 3.8, Alpine 3.7, Alpine 3.6 +3 more 1.0.2n-r0

alpine advisories ALPINE-CVE-2017-3737

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2017-3737 updated cvss 5.9

openssl: Read/write after SSL object in error state

  • Red Hat JBoss Enterprise Application Platform 6 openssl Red Hat JBoss Enterprise Web Server 2 openssl
    affected: no fix planned “Will not fix”
  • Red Hat JBoss Web Server 3 openssl
    affected: no fix available
  • Red Hat Enterprise Linux Client (v. 7) openssl 1.0.2k-12.el7, openssl-libs 1.0.2k-12.el7 Red Hat Enterprise Linux Client Optional (v. 7) openssl-perl 1.0.2k-12.el7 Red Hat Enterprise Linux ComputeNode (v. 7) openssl 1.0.2k-12.el7, openssl-libs 1.0.2k-12.el7 Red Hat Enterprise Linux ComputeNode Optional (v. 7) openssl-perl 1.0.2k-12.el7 Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) openssl 1.0.2k-12.el7, openssl-libs 1.0.2k-12.el7 Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) openssl-perl 1.0.2k-12.el7
    +4 more products
    Red Hat Enterprise Linux Server (v. 7) openssl 1.0.2k-12.el7, openssl-libs 1.0.2k-12.el7 Red Hat Enterprise Linux Server Optional (v. 7) openssl-perl 1.0.2k-12.el7 Red Hat Enterprise Linux Workstation (v. 7) openssl 1.0.2k-12.el7, openssl-libs 1.0.2k-12.el7 Red Hat Enterprise Linux Workstation Optional (v. 7) openssl-perl 1.0.2k-12.el7
    fixed: vendor fix RHSA-2018:0998
  • Red Hat JBoss Core Services
    fixed: vendor fix RHSA-2018:2187
  • Red Hat JBoss Core Services on RHEL 6 Server jbcs-httpd24-apr 1.6.3-14.jbcs.el6, jbcs-httpd24-httpd 2.4.29-17.jbcs.el6, jbcs-httpd24-apr-util 1.6.1-9.jbcs.el6, jbcs-httpd24-nghttp2 1.29.0-8.jbcs.el6, jbcs-httpd24-mod_ssl 2.4.29-17.jbcs.el6, jbcs-httpd24-openssl 1.0.2n-11.jbcs.el6, +25 more
    fixed: vendor fix RHSA-2018:2186
  • Red Hat JBoss Core Services on RHEL 7 Server jbcs-httpd24-apr 1.6.3-14.jbcs.el7, jbcs-httpd24-httpd 2.4.29-17.jbcs.el7, jbcs-httpd24-apr-util 1.6.1-9.jbcs.el7, jbcs-httpd24-nghttp2 1.29.0-8.jbcs.el7, jbcs-httpd24-mod_ssl 2.4.29-17.jbcs.el7, jbcs-httpd24-openssl 1.0.2n-11.jbcs.el7, +25 more
    fixed: vendor fix RHSA-2018:2185
  • Red Hat Enterprise Linux 5 openssl, openssl097a Red Hat Enterprise Linux 6 openssl, openssl098e, openssl-perl Red Hat Enterprise Linux 7 OVMF, openssl098e Red Hat Enterprise Linux 8 openssl, openssl-libs, openssl-perl Red Hat Enterprise Virtualization 3 mingw-virt-viewer, mingw32-virt-viewer, mingw64-virt-viewer Red Hat JBoss Enterprise Application Platform 5 openssl
    +1 more products
    Red Hat JBoss Enterprise Web Server 3 openssl
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

cisa ICSA-18-226-02 updated cvss 5.9

Siemens OpenSSL Vulnerability in Industrial Products (Update E)

  • Siemens MindConnect IoT2040 <V03.01 Siemens MindConnect Nano (IPC227D) <V03.01
    affected: fixed in V03.01, mitigation
  • Siemens SIMATIC ET 200SP Open Controller CPU 1515SP PC (incl. SIPLUS variants) >=V2.0_<V2.1.6
    affected: fixed in V2.1.6, mitigation support.industry.siemens.com
  • Siemens SIMATIC HMI WinCC Flexible <V15.1
    affected: fixed in V15.1, mitigation support.industry.siemens.com
  • Siemens SIMATIC IPC DiagBase <V2.1.1.0
    affected: fixed in V2.1.1.0, mitigation support.industry.siemens.com
  • Siemens SIMATIC IPC DiagMonitor <V5.0.3
    affected: fixed in V5.0.3, mitigation support.industry.siemens.com
  • Siemens SIMATIC S7-1200 CPU family (incl. SIPLUS variants) <V4.2.3
    affected: fixed in V4.2.3, mitigation support.industry.siemens.com
  • Siemens SIMATIC S7-1500 CPU family (incl. related ET200 CPUs and SIPLUS variants) <V2.5.2
    affected: fixed in V2.5.2, mitigation support.industry.siemens.com
  • Siemens SIMATIC S7-1500 Software Controller >=V2.0_and_<V2.6
    affected: fixed in V2.6, mitigation support.industry.siemens.com
show 11 more
  • Siemens SIMATIC STEP 7 (TIA Portal) V13 <V13_SP2_Update_2
    affected: fixed in V13, mitigation support.industry.siemens.com
  • Siemens SIMATIC STEP 7 (TIA Portal) V14 <V14_SP1_Update_6
    affected: fixed in V14, mitigation support.industry.siemens.com
  • Siemens SIMATIC STEP 7 (TIA Portal) V15 <V15_Update_2
    affected: fixed in V15, mitigation support.industry.siemens.com
  • Siemens SIMATIC WinCC (TIA Portal) V13 <V13_SP2_Update_2
    affected: fixed in V13, mitigation support.industry.siemens.com
  • Siemens SIMATIC WinCC (TIA Portal) V14 <V14_SP1_Upd_6
    affected: fixed in V14, mitigation support.industry.siemens.com
  • Siemens SIMATIC WinCC (TIA Portal) V15 <V15_Update_2
    affected: fixed in V15, mitigation support.industry.siemens.com
  • Siemens SIMATIC WinCC OA V3.14 <V3.14_P021
    affected: fixed in V3.14, mitigation winccoa.com
  • Siemens SIMATIC WinCC OA V3.15 <V3.15_P014
    affected: fixed in V3.15, mitigation winccoa.com
  • Siemens SIMATIC WinCC OA V3.16 <V3.16_P002
    affected: fixed in V3.16, mitigation winccoa.com
  • Siemens SINUMERIK Integrate Access MyMachine service engineer client as part of Sinumerik Integrate Product suite <V4.1.8
    affected: fixed in V4.1.8, mitigation w3.siemens.com
  • Siemens SINUMERIK Integrate Operate Client as part of Sinumerik Integrate Product suite <=2.0.11_/_3.0.11
    affected: fixed in V2.0.12, mitigation w3.siemens.com

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

cisa ICSA-19-155-01 updated cvss 5.9

PHOENIX CONTACT PLCNext AXC F 2152

  • Phoenix Contact AXC F 2152 2404267 version 1.x, 1046568 (Starterkit) version 1.x
    affected: vendor fix, mitigation “Phoenix Contact recommends affected users update to firmware release 2019.0 LTS or later, update to PLCNext Engineer release 2019.0 LTS or later, and apply the following specific mitigations below:” phoenixcontact.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

Exploit prediction

78.67% chance of exploitation in the next 30 days, higher than 99.5% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.0 5.9 CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:P/I:N/A:N

Affected products

  • OpenSSL Software Foundation OpenSSL

Classification

Weakness
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.