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TI-2016-05395 Aliases CVE-2016-6302GHSA-h9vm-qp4h-23fm

The tls_decrypt_ticket function in ssl/t1_lib.c in OpenSSL before 1.1.0 does not consider…

Priority MEDIUM 55CWE-20Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 19 fixed, 4 without a fix

Attack profile from CVSS 3.0 · NVD. Fix status from CNA and Red Hat.

Summary

The tls_decrypt_ticket function in ssl/t1_lib.c in OpenSSL before 1.1.0 does not consider the HMAC size during validation of the ticket length, which allows remote attackers to cause a denial of service via a ticket that is too short.

Why it matters now

EPSS 0.27806 98th percentileScored 2026-11-07
Fix Partial Red Hat: 4 advisoriesRed Hat: 19 fixed, 4 without a fix

SSVC decision points

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

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 34

CPEVersionsRoleVendor
cpe:2.3:a:openssl:openssl:1.0.1:*:*:*:*:*:*:*1.0.1VulnerableOpenSSL
cpe:2.3:a:openssl:openssl:1.0.1a:*:*:*:*:*:*:*1.0.1aVulnerableOpenSSL
cpe:2.3:a:openssl:openssl:1.0.1b:*:*:*:*:*:*:*1.0.1bVulnerableOpenSSL
cpe:2.3:a:openssl:openssl:1.0.1c:*:*:*:*:*:*:*1.0.1cVulnerableOpenSSL
cpe:2.3:a:openssl:openssl:1.0.1d:*:*:*:*:*:*:*1.0.1dVulnerableOpenSSL
cpe:2.3:a:openssl:openssl:1.0.1e:*:*:*:*:*:*:*1.0.1eVulnerableOpenSSL
cpe:2.3:a:openssl:openssl:1.0.1f:*:*:*:*:*:*:*1.0.1fVulnerableOpenSSL
cpe:2.3:a:openssl:openssl:1.0.1g:*:*:*:*:*:*:*1.0.1gVulnerableOpenSSL
cpe:2.3:a:openssl:openssl:1.0.1h:*:*:*:*:*:*:*1.0.1hVulnerableOpenSSL
cpe:2.3:a:openssl:openssl:1.0.1i:*:*:*:*:*:*:*1.0.1iVulnerableOpenSSL
  • cpe:2.3:a:openssl:openssl:1.0.1:*:*:*:*:*:*:* Versions 1.0.1 Vulnerable ·OpenSSL
  • cpe:2.3:a:openssl:openssl:1.0.1a:*:*:*:*:*:*:* Versions 1.0.1a Vulnerable ·OpenSSL
  • cpe:2.3:a:openssl:openssl:1.0.1b:*:*:*:*:*:*:* Versions 1.0.1b Vulnerable ·OpenSSL
  • cpe:2.3:a:openssl:openssl:1.0.1c:*:*:*:*:*:*:* Versions 1.0.1c Vulnerable ·OpenSSL
  • cpe:2.3:a:openssl:openssl:1.0.1d:*:*:*:*:*:*:* Versions 1.0.1d Vulnerable ·OpenSSL
  • cpe:2.3:a:openssl:openssl:1.0.1e:*:*:*:*:*:*:* Versions 1.0.1e Vulnerable ·OpenSSL
  • cpe:2.3:a:openssl:openssl:1.0.1f:*:*:*:*:*:*:* Versions 1.0.1f Vulnerable ·OpenSSL
  • cpe:2.3:a:openssl:openssl:1.0.1g:*:*:*:*:*:*:* Versions 1.0.1g Vulnerable ·OpenSSL
  • cpe:2.3:a:openssl:openssl:1.0.1h:*:*:*:*:*:*:* Versions 1.0.1h Vulnerable ·OpenSSL
  • cpe:2.3:a:openssl:openssl:1.0.1i:*:*:*:*:*:*:* Versions 1.0.1i Vulnerable ·OpenSSL
Show 24 more CPE
CPEVersionsRoleVendor
cpe:2.3:a:openssl:openssl:1.0.1j:*:*:*:*:*:*:*1.0.1jVulnerableOpenSSL
cpe:2.3:a:openssl:openssl:1.0.1k:*:*:*:*:*:*:*1.0.1kVulnerableOpenSSL
cpe:2.3:a:openssl:openssl:1.0.1l:*:*:*:*:*:*:*1.0.1lVulnerableOpenSSL
cpe:2.3:a:openssl:openssl:1.0.1m:*:*:*:*:*:*:*1.0.1mVulnerableOpenSSL
cpe:2.3:a:openssl:openssl:1.0.1n:*:*:*:*:*:*:*1.0.1nVulnerableOpenSSL
cpe:2.3:a:openssl:openssl:1.0.1o:*:*:*:*:*:*:*1.0.1oVulnerableOpenSSL
cpe:2.3:a:openssl:openssl:1.0.1p:*:*:*:*:*:*:*1.0.1pVulnerableOpenSSL
cpe:2.3:a:openssl:openssl:1.0.1q:*:*:*:*:*:*:*1.0.1qVulnerableOpenSSL
cpe:2.3:a:openssl:openssl:1.0.1r:*:*:*:*:*:*:*1.0.1rVulnerableOpenSSL
cpe:2.3:a:openssl:openssl:1.0.1s:*:*:*:*:*:*:*1.0.1sVulnerableOpenSSL
cpe:2.3:a:openssl:openssl:1.0.1t:*:*:*:*:*:*:*1.0.1tVulnerableOpenSSL
cpe:2.3:a:openssl:openssl:1.0.2:*:*:*:*:*:*:*1.0.2VulnerableOpenSSL
cpe:2.3:a:openssl:openssl:1.0.2a:*:*:*:*:*:*:*1.0.2aVulnerableOpenSSL
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:o:oracle:linux:6:*:*:*:*:*:*:*6VulnerableOracle
cpe:2.3:o:oracle:linux:7:*:*:*:*:*:*:*7VulnerableOracle
cpe:2.3:o:oracle:solaris:10:*:*:*:*:*:*:*10VulnerableOracle
cpe:2.3:o:oracle:solaris:11.3:*:*:*:*:*:*:*11.3VulnerableOracle
  • cpe:2.3:a:openssl:openssl:1.0.1j:*:*:*:*:*:*:* Versions 1.0.1j Vulnerable ·OpenSSL
  • cpe:2.3:a:openssl:openssl:1.0.1k:*:*:*:*:*:*:* Versions 1.0.1k Vulnerable ·OpenSSL
  • cpe:2.3:a:openssl:openssl:1.0.1l:*:*:*:*:*:*:* Versions 1.0.1l Vulnerable ·OpenSSL
  • cpe:2.3:a:openssl:openssl:1.0.1m:*:*:*:*:*:*:* Versions 1.0.1m Vulnerable ·OpenSSL
  • cpe:2.3:a:openssl:openssl:1.0.1n:*:*:*:*:*:*:* Versions 1.0.1n Vulnerable ·OpenSSL
  • cpe:2.3:a:openssl:openssl:1.0.1o:*:*:*:*:*:*:* Versions 1.0.1o Vulnerable ·OpenSSL
  • cpe:2.3:a:openssl:openssl:1.0.1p:*:*:*:*:*:*:* Versions 1.0.1p Vulnerable ·OpenSSL
  • cpe:2.3:a:openssl:openssl:1.0.1q:*:*:*:*:*:*:* Versions 1.0.1q Vulnerable ·OpenSSL
  • cpe:2.3:a:openssl:openssl:1.0.1r:*:*:*:*:*:*:* Versions 1.0.1r Vulnerable ·OpenSSL
  • cpe:2.3:a:openssl:openssl:1.0.1s:*:*:*:*:*:*:* Versions 1.0.1s Vulnerable ·OpenSSL
  • cpe:2.3:a:openssl:openssl:1.0.1t:*:*:*:*:*:*:* Versions 1.0.1t Vulnerable ·OpenSSL
  • cpe:2.3:a:openssl:openssl:1.0.2:*:*:*:*:*:*:* Versions 1.0.2 Vulnerable ·OpenSSL
  • cpe:2.3:a:openssl:openssl:1.0.2a:*:*:*:*:*:*:* Versions 1.0.2a Vulnerable ·OpenSSL
  • 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:o:oracle:linux:6:*:*:*:*:*:*:* Versions 6 Vulnerable ·Oracle
  • cpe:2.3:o:oracle:linux:7:*:*:*:*:*:*:* Versions 7 Vulnerable ·Oracle
  • cpe:2.3:o:oracle:solaris:10:*:*:*:*:*:*:* Versions 10 Vulnerable ·Oracle
  • cpe:2.3:o:oracle:solaris:11.3:*:*:*:*:*:*:* Versions 11.3 Vulnerable ·Oracle

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-2016:1940 Released 2016-09-27 · Red Hat rating Important
    openssl security update
    • Red Hat Enterprise Linux Client (v. 7) openssl-1:1.0.1e-51.el7_2.7, openssl-libs-1:1.0.1e-51.el7_2.7
    • Red Hat Enterprise Linux Client Optional (v. 7) openssl-devel-1:1.0.1e-51.el7_2.7, openssl-perl-1:1.0.1e-51.el7_2.7, openssl-static-1:1.0.1e-51.el7_2.7
    • Red Hat Enterprise Linux ComputeNode (v. 7) openssl-1:1.0.1e-51.el7_2.7, openssl-libs-1:1.0.1e-51.el7_2.7
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) openssl-devel-1:1.0.1e-51.el7_2.7, openssl-perl-1:1.0.1e-51.el7_2.7, openssl-static-1:1.0.1e-51.el7_2.7
    • Red Hat Enterprise Linux Desktop (v. 6) openssl-1.0.1e-48.el6_8.3
    • Red Hat Enterprise Linux Desktop Optional (v. 6) openssl-devel-1.0.1e-48.el6_8.3, openssl-perl-1.0.1e-48.el6_8.3, openssl-static-1.0.1e-48.el6_8.3
    • Red Hat Enterprise Linux HPC Node (v. 6) openssl-1.0.1e-48.el6_8.3
    • Red Hat Enterprise Linux HPC Node Optional (v. 6) openssl-devel-1.0.1e-48.el6_8.3, openssl-perl-1.0.1e-48.el6_8.3, openssl-static-1.0.1e-48.el6_8.3
    • Red Hat Enterprise Linux Server (v. 6) openssl-1.0.1e-48.el6_8.3, openssl-1.0.1e-48.el6_8.3.ppc, openssl-devel-1.0.1e-48.el6_8.3 +1
    • Red Hat Enterprise Linux Server (v. 7) openssl-1:1.0.1e-51.el7_2.7, openssl-devel-1:1.0.1e-51.el7_2.7, openssl-devel-1:1.0.1e-51.el7_2.7.ppc +2
    • Red Hat Enterprise Linux Server Optional (v. 6) openssl-perl-1.0.1e-48.el6_8.3, openssl-static-1.0.1e-48.el6_8.3
    • Red Hat Enterprise Linux Server Optional (v. 7) openssl-perl-1:1.0.1e-51.el7_2.7, openssl-static-1:1.0.1e-51.el7_2.7, openssl-static-1:1.0.1e-51.el7_2.7.ppc
    • Red Hat Enterprise Linux Workstation (v. 6) openssl-1.0.1e-48.el6_8.3, openssl-devel-1.0.1e-48.el6_8.3
    • Red Hat Enterprise Linux Workstation (v. 7) openssl-1:1.0.1e-51.el7_2.7, openssl-devel-1:1.0.1e-51.el7_2.7, openssl-libs-1:1.0.1e-51.el7_2.7
    • Red Hat Enterprise Linux Workstation Optional (v. 6) openssl-perl-1.0.1e-48.el6_8.3, openssl-static-1.0.1e-48.el6_8.3
    • Red Hat Enterprise Linux Workstation Optional (v. 7) openssl-perl-1:1.0.1e-51.el7_2.7, openssl-static-1:1.0.1e-51.el7_2.7

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 yet
Red Hat JBoss Enterprise Web Server 1AffectedNo fix planned: Will not fix
Red Hat JBoss Enterprise Web Server 2AffectedNo fix planned: Will not fix
Red Hat JBoss Enterprise Web Server 3AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2016:1940
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2016:1940
Red Hat Enterprise Linux ComputeNode (v. 7)Fixed RHSA-2016:1940
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2016:1940
Red Hat Enterprise Linux Desktop (v. 6)Fixed RHSA-2016:1940
Red Hat Enterprise Linux Desktop Optional (v. 6)Fixed RHSA-2016:1940
Red Hat Enterprise Linux HPC Node (v. 6)Fixed RHSA-2016:1940
Red Hat Enterprise Linux HPC Node Optional (v. 6)Fixed RHSA-2016:1940
Red Hat Enterprise Linux Server (v. 6)Fixed RHSA-2016:1940
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2016:1940
Red Hat Enterprise Linux Server Optional (v. 6)Fixed RHSA-2016:1940
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2016:1940
Red Hat Enterprise Linux Workstation (v. 6)Fixed RHSA-2016:1940
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2016:1940
Red Hat Enterprise Linux Workstation Optional (v. 6)Fixed RHSA-2016:1940
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2016:1940
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: 3 products
  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7

Timeline

  1. 2026-10-02 Threatist record created from CVE-2016-6302
  2. 2026-10-03 Alias added: GHSA-h9vm-qp4h-23fm

References

Patch 4

Advisory 12

Other 8

Sources

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