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TI-2017-02853 Aliases CVE-2017-3737GHSA-fwxf-w2h7-9w25

Out-of-bounds read in OpenSSL

Priority HIGH 66CWE-125Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
Partial Red Hat: 13 fixed, 3 without a fix

Attack profile from CVSS 3.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-125 and the CVSS impact.

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.

Why it matters now

EPSS 0.78675 99th percentileScored 2026-11-07
Fix Partial Red Hat: 4 advisoriesRed Hat: 13 fixed, 3 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
OpenSSLOpenSSL1.0.2b-1.0.2m—No fix listedCNA
  • OpenSSL VendorOpenSSL Affected 1.0.2b-1.0.2m Fixed in — No fix listed CNA

CPE configurations NVD · 13

CPEVersionsRoleVendor
cpe:2.3:a:openssl:openssl:1.0.2b:*:*:*:*:*:*:*1.0.2bVulnerableOpenSSL
cpe:2.3:a:openssl:openssl:1.0.2c:*:*:*:*:*:*:*1.0.2cVulnerableOpenSSL
cpe:2.3:a:openssl:openssl:1.0.2d:*:*:*:*:*:*:*1.0.2dVulnerableOpenSSL
cpe:2.3:a:openssl:openssl:1.0.2e:*:*:*:*:*:*:*1.0.2eVulnerableOpenSSL
cpe:2.3:a:openssl:openssl:1.0.2f:*:*:*:*:*:*:*1.0.2fVulnerableOpenSSL
cpe:2.3:a:openssl:openssl:1.0.2g:*:*:*:*:*:*:*1.0.2gVulnerableOpenSSL
cpe:2.3:a:openssl:openssl:1.0.2h:*:*:*:*:*:*:*1.0.2hVulnerableOpenSSL
cpe:2.3:a:openssl:openssl:1.0.2i:*:*:*:*:*:*:*1.0.2iVulnerableOpenSSL
cpe:2.3:a:openssl:openssl:1.0.2j:*:*:*:*:*:*:*1.0.2jVulnerableOpenSSL
cpe:2.3:a:openssl:openssl:1.0.2k:*:*:*:*:*:*:*1.0.2kVulnerableOpenSSL
  • cpe:2.3:a:openssl:openssl:1.0.2b:*:*:*:*:*:*:* Versions 1.0.2b Vulnerable ·OpenSSL
  • cpe:2.3:a:openssl:openssl:1.0.2c:*:*:*:*:*:*:* Versions 1.0.2c Vulnerable ·OpenSSL
  • cpe:2.3:a:openssl:openssl:1.0.2d:*:*:*:*:*:*:* Versions 1.0.2d Vulnerable ·OpenSSL
  • cpe:2.3:a:openssl:openssl:1.0.2e:*:*:*:*:*:*:* Versions 1.0.2e Vulnerable ·OpenSSL
  • cpe:2.3:a:openssl:openssl:1.0.2f:*:*:*:*:*:*:* Versions 1.0.2f Vulnerable ·OpenSSL
  • cpe:2.3:a:openssl:openssl:1.0.2g:*:*:*:*:*:*:* Versions 1.0.2g Vulnerable ·OpenSSL
  • cpe:2.3:a:openssl:openssl:1.0.2h:*:*:*:*:*:*:* Versions 1.0.2h Vulnerable ·OpenSSL
  • cpe:2.3:a:openssl:openssl:1.0.2i:*:*:*:*:*:*:* Versions 1.0.2i Vulnerable ·OpenSSL
  • cpe:2.3:a:openssl:openssl:1.0.2j:*:*:*:*:*:*:* Versions 1.0.2j Vulnerable ·OpenSSL
  • cpe:2.3:a:openssl:openssl:1.0.2k:*:*:*:*:*:*:* Versions 1.0.2k Vulnerable ·OpenSSL
Show 3 more CPE
CPEVersionsRoleVendor
cpe:2.3:a:openssl:openssl:1.0.2l:*:*:*:*:*:*:*1.0.2lVulnerableOpenSSL
cpe:2.3:a:openssl:openssl:1.0.2m:*:*:*:*:*:*:*1.0.2mVulnerableOpenSSL
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*9.0VulnerableDebian
  • cpe:2.3:a:openssl:openssl:1.0.2l:*:*:*:*:*:*:* Versions 1.0.2l Vulnerable ·OpenSSL
  • cpe:2.3:a:openssl:openssl:1.0.2m:*:*:*:*:*:*:* Versions 1.0.2m Vulnerable ·OpenSSL
  • cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian

Remediation

Red Hat 4 advisories

  • RHSA-2018:2186 Released 2018-07-12 · Red Hat rating Moderate
    Red Hat JBoss Core Services Apache HTTP Server 2.4.29 RHEL 6 security update
    • Red Hat JBoss Core Services on RHEL 6 Server jbcs-httpd24-apache-commons-daemon-1.1.0-1.redhat_2.1.jbcs.el6, jbcs-httpd24-apache-commons-daemon-jsvc-1:1.1.0-1.redhat_2.jbcs.el6, jbcs-httpd24-apr-1.6.3-14.jbcs.el6 +34
  • RHSA-2018:2185 Released 2018-07-12 · Red Hat rating Moderate
    Red Hat JBoss Core Services Apache HTTP Server 2.4.29 RHEL 7 security update
    • Red Hat JBoss Core Services on RHEL 7 Server jbcs-httpd24-apache-commons-daemon-1.1.0-1.redhat_2.1.jbcs.el7, jbcs-httpd24-apache-commons-daemon-jsvc-1:1.1.0-1.redhat_2.jbcs.el7, jbcs-httpd24-apr-1.6.3-14.jbcs.el7 +34
  • RHSA-2018:2187 Released 2018-07-12 · Red Hat rating Moderate
    Red Hat JBoss Core Services Apache HTTP Server 2.4.29 security update
    • Red Hat JBoss Core Services
Show 1 more Red Hat advisories
  • RHSA-2018:0998 Released 2018-04-10 · Red Hat rating Moderate
    openssl security and bug fix update
    • Red Hat Enterprise Linux Client (v. 7) openssl-1:1.0.2k-12.el7, openssl-libs-1:1.0.2k-12.el7
    • Red Hat Enterprise Linux Client Optional (v. 7) openssl-devel-1:1.0.2k-12.el7, openssl-perl-1:1.0.2k-12.el7, openssl-static-1:1.0.2k-12.el7
    • Red Hat Enterprise Linux ComputeNode (v. 7) openssl-1:1.0.2k-12.el7, openssl-libs-1:1.0.2k-12.el7
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) openssl-devel-1:1.0.2k-12.el7, openssl-perl-1:1.0.2k-12.el7, openssl-static-1:1.0.2k-12.el7
    • Red Hat Enterprise Linux Server (v. 7) openssl-1:1.0.2k-12.el7, openssl-devel-1:1.0.2k-12.el7, openssl-devel-1:1.0.2k-12.el7.ppc +2
    • Red Hat Enterprise Linux Server Optional (v. 7) openssl-perl-1:1.0.2k-12.el7, openssl-static-1:1.0.2k-12.el7, openssl-static-1:1.0.2k-12.el7.ppc
    • Red Hat Enterprise Linux Workstation (v. 7) openssl-1:1.0.2k-12.el7, openssl-devel-1:1.0.2k-12.el7, openssl-libs-1:1.0.2k-12.el7
    • Red Hat Enterprise Linux Workstation Optional (v. 7) openssl-perl-1:1.0.2k-12.el7, openssl-static-1:1.0.2k-12.el7
    • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) openssl-1:1.0.2k-12.el7, openssl-devel-1:1.0.2k-12.el7, openssl-libs-1:1.0.2k-12.el7
    • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) openssl-perl-1:1.0.2k-12.el7, openssl-static-1:1.0.2k-12.el7

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    OpenSSL — FreeBSD-SA-17:12

    2 records Highest priority Priority HIGH 1 HIGH, 1 MEDIUM

    Other records, highest priority first

    • TI-2017-02854 Information disclosure in OpenSSLPriority MEDIUM 41
    Show all 2 records → Advisory →
  • Advisory ·

    OpenSSL — DSA-4065

    2 records Highest priority Priority HIGH 1 HIGH, 1 MEDIUM

    Other records, highest priority first

    • TI-2017-02854 Information disclosure in OpenSSLPriority MEDIUM 41
    Show all 2 records → Advisory →

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat JBoss Enterprise Application Platform 6AffectedNo fix planned: Will not fix
Red Hat JBoss Enterprise Web Server 2AffectedNo fix planned: Will not fix
Red Hat JBoss Web Server 3AffectedNo fix yet
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2018:0998
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2018:0998
Red Hat Enterprise Linux ComputeNode (v. 7)Fixed RHSA-2018:0998
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2018:0998
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2018:0998
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2018:0998
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2018:0998
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2018:0998
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)Fixed RHSA-2018:0998
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7)Fixed RHSA-2018:0998
Red Hat JBoss Core ServicesFixed RHSA-2018:2187
Red Hat JBoss Core Services on RHEL 6 ServerFixed RHSA-2018:2186
Red Hat JBoss Core Services on RHEL 7 ServerFixed RHSA-2018:2185
Not affected: 7 products
  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Virtualization 3
  • Red Hat JBoss Enterprise Application Platform 5
  • Red Hat JBoss Enterprise Web Server 3

Timeline

  1. 2026-10-02 Threatist record created from CVE-2017-3737
  2. 2026-10-03 Alias added: GHSA-fwxf-w2h7-9w25

References

Advisory 10

Other 9

  • TI-2022-01915 The c_rehash script allows command injection CVSS 3.1CRITICAL 9.8
  • TI-2021-02645 SM2 Decryption Buffer Overflow CVSS 3.1CRITICAL 9.8
  • TI-2009-03392 The TLS protocol, and the SSL protocol 3.0 and possibly earlier, as used in Microsoft… CVSS 3.1CRITICAL 9.8
  • TI-2022-01176 The c_rehash script allows command injection CVSS 3.1CRITICAL 9.8
  • TI-2014-00154 The (1) TLS and (2) DTLS implementations in OpenSSL 1.0.1 before 1.0.1g do not properly… KEVCVSS 3.1HIGH 7.5
  • TI-2025-14107 Stack buffer overflow in CMS (Auth)EnvelopedData parsing CVSS 3.1HIGH 8.8
See all 312 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences