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TI-2018-11033 Aliases CVE-2018-15473GHSA-c8qw-h3f6-fv63

OpenSSH through 7.7 is prone to a user enumeration vulnerability due to not delaying…

Priority HIGH 71CWE-362Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
—
Confidentiality · integrity · availability
High · None · None
Fix status
Partial Red Hat: 16 fixed, 1 without a fix

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat.

Summary

OpenSSH through 7.7 is prone to a user enumeration vulnerability due to not delaying bailout for an invalid authenticating user until after the packet containing the request has been fully parsed, related to auth2-gss.c, auth2-hostbased.c, and auth2-pubkey.c.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.98675 99th percentileScored 2026-11-07
Public exploit Yes 3 exploit referencesTagged by the CNA and NVD
Fix Partial Red Hat: 2 advisoriesRed Hat: 16 fixed, 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

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

CPE configurations NVD · 31

CPEVersionsRoleVendor
cpe:2.3:a:openbsd:openssh:*:*:*:*:*:*:*:*up to 7.7VulnerableOpenBSD
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*8.0VulnerableDebian
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*9.0VulnerableDebian
cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:*6.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:*6.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:*6.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*14.04VulnerableCanonical
  • cpe:2.3:a:openbsd:openssh:*:*:*:*:*:*:*:* Versions up to 7.7 Vulnerable ·OpenBSD
  • cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Debian
  • cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
  • cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
  • cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* Versions 14.04 Vulnerable ·Canonical
Show 21 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*16.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*18.04VulnerableCanonical
cpe:2.3:o:netapp:cn1610_firmware:-:*:*:*:*:*:*:*not specified by NVDVulnerableNetApp
cpe:2.3:h:netapp:cn1610:-:*:*:*:*:*:*:*not specified by NVDRunning onNetApp
cpe:2.3:a:netapp:aff_baseboard_management_controller:-:*:*:*:*:*:*:*not specified by NVDVulnerableNetApp
cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:*not specified by NVDVulnerableNetApp
cpe:2.3:a:netapp:data_ontap_edge:-:*:*:*:*:*:*:*not specified by NVDVulnerableNetApp
cpe:2.3:a:netapp:fas_baseboard_management_controller:-:*:*:*:*:*:*:*not specified by NVDVulnerableNetApp
cpe:2.3:a:netapp:oncommand_unified_manager:*:*:*:*:*:vsphere:*:*9.4VulnerableNetApp
cpe:2.3:a:netapp:ontap_select_deploy:-:*:*:*:*:*:*:*not specified by NVDVulnerableNetApp
cpe:2.3:a:netapp:service_processor:-:*:*:*:*:*:*:*not specified by NVDVulnerableNetApp
cpe:2.3:a:netapp:steelstore_cloud_integrated_storage:-:*:*:*:*:*:*:*not specified by NVDVulnerableNetApp
cpe:2.3:a:netapp:virtual_storage_console:*:*:*:*:*:vsphere:*:*7.2VulnerableNetApp
cpe:2.3:o:netapp:clustered_data_ontap:-:*:*:*:*:*:*:*not specified by NVDVulnerableNetApp
cpe:2.3:o:netapp:data_ontap:-:*:*:*:*:7-mode:*:*not specified by NVDVulnerableNetApp
cpe:2.3:a:netapp:vasa_provider:*:*:*:*:*:*:*:*7.2VulnerableNetApp
cpe:2.3:o:netapp:clustered_data_ontap:-:*:*:*:*:*:*:*not specified by NVDRunning onNetApp
cpe:2.3:a:netapp:storage_replication_adapter:*:*:*:*:*:vsphere:*:*7.2VulnerableNetApp
cpe:2.3:a:oracle:sun_zfs_storage_appliance_kit:8.8.6:*:*:*:*:*:*:*8.8.6VulnerableOracle
cpe:2.3:o:siemens:scalance_x204rna_firmware:*:*:*:*:*:*:*:*before 3.2.7VulnerableSiemens
cpe:2.3:h:siemens:scalance_x204rna:-:*:*:*:*:*:*:*not specified by NVDRunning onSiemens
  • cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* Versions 16.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* Versions 18.04 Vulnerable ·Canonical
  • cpe:2.3:o:netapp:cn1610_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
  • cpe:2.3:h:netapp:cn1610:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NetApp
  • cpe:2.3:a:netapp:aff_baseboard_management_controller:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
  • cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
  • cpe:2.3:a:netapp:data_ontap_edge:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
  • cpe:2.3:a:netapp:fas_baseboard_management_controller:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
  • cpe:2.3:a:netapp:oncommand_unified_manager:*:*:*:*:*:vsphere:*:* Versions 9.4 Vulnerable ·NetApp
  • cpe:2.3:a:netapp:ontap_select_deploy:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
  • cpe:2.3:a:netapp:service_processor:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
  • cpe:2.3:a:netapp:steelstore_cloud_integrated_storage:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
  • cpe:2.3:a:netapp:virtual_storage_console:*:*:*:*:*:vsphere:*:* Versions 7.2 Vulnerable ·NetApp
  • cpe:2.3:o:netapp:clustered_data_ontap:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
  • cpe:2.3:o:netapp:data_ontap:-:*:*:*:*:7-mode:*:* Versions not specified by NVD Vulnerable ·NetApp
  • cpe:2.3:a:netapp:vasa_provider:*:*:*:*:*:*:*:* Versions 7.2 Vulnerable ·NetApp
  • cpe:2.3:o:netapp:clustered_data_ontap:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NetApp
  • cpe:2.3:a:netapp:storage_replication_adapter:*:*:*:*:*:vsphere:*:* Versions 7.2 Vulnerable ·NetApp
  • cpe:2.3:a:oracle:sun_zfs_storage_appliance_kit:8.8.6:*:*:*:*:*:*:* Versions 8.8.6 Vulnerable ·Oracle
  • cpe:2.3:o:siemens:scalance_x204rna_firmware:*:*:*:*:*:*:*:* Versions before 3.2.7 Vulnerable ·Siemens
  • cpe:2.3:h:siemens:scalance_x204rna:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Siemens

Remediation

Red Hat 2 advisories

  • RHSA-2019:2143 Released 2019-08-06 · Red Hat rating Low
    openssh security, bug fix, and enhancement update
    • Red Hat Enterprise Linux Client (v. 7) openssh-7.4p1-21.el7, openssh-askpass-7.4p1-21.el7, openssh-clients-7.4p1-21.el7 +2
    • Red Hat Enterprise Linux Client Optional (v. 7) openssh-cavs-7.4p1-21.el7, openssh-ldap-7.4p1-21.el7, openssh-server-sysvinit-7.4p1-21.el7 +1
    • Red Hat Enterprise Linux ComputeNode (v. 7) openssh-7.4p1-21.el7, openssh-clients-7.4p1-21.el7, openssh-keycat-7.4p1-21.el7 +1
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) openssh-askpass-7.4p1-21.el7, openssh-cavs-7.4p1-21.el7, openssh-ldap-7.4p1-21.el7 +2
    • Red Hat Enterprise Linux Server (v. 7) openssh-7.4p1-21.el7, openssh-askpass-7.4p1-21.el7, openssh-clients-7.4p1-21.el7 +2
    • Red Hat Enterprise Linux Server Optional (v. 7) openssh-cavs-7.4p1-21.el7, openssh-ldap-7.4p1-21.el7, openssh-server-sysvinit-7.4p1-21.el7 +2
    • Red Hat Enterprise Linux Workstation (v. 7) openssh-7.4p1-21.el7, openssh-askpass-7.4p1-21.el7, openssh-clients-7.4p1-21.el7 +2
    • Red Hat Enterprise Linux Workstation Optional (v. 7) openssh-cavs-7.4p1-21.el7, openssh-ldap-7.4p1-21.el7, openssh-server-sysvinit-7.4p1-21.el7 +1
  • RHSA-2019:0711 Released 2019-04-09 · Red Hat rating Low
    openssh security update
    • Red Hat Enterprise Linux Desktop (v. 6) openssh-5.3p1-124.el6_10, openssh-askpass-5.3p1-124.el6_10, openssh-clients-5.3p1-124.el6_10 +1
    • Red Hat Enterprise Linux Desktop Optional (v. 6) openssh-ldap-5.3p1-124.el6_10, pam_ssh_agent_auth-0.9.3-124.el6_10
    • Red Hat Enterprise Linux HPC Node (v. 6) openssh-5.3p1-124.el6_10, openssh-clients-5.3p1-124.el6_10, openssh-server-5.3p1-124.el6_10
    • Red Hat Enterprise Linux HPC Node Optional (v. 6) openssh-askpass-5.3p1-124.el6_10, openssh-ldap-5.3p1-124.el6_10, pam_ssh_agent_auth-0.9.3-124.el6_10
    • Red Hat Enterprise Linux Server (v. 6) openssh-5.3p1-124.el6_10, openssh-askpass-5.3p1-124.el6_10, openssh-clients-5.3p1-124.el6_10 +1
    • Red Hat Enterprise Linux Server Optional (v. 6) openssh-ldap-5.3p1-124.el6_10, pam_ssh_agent_auth-0.9.3-124.el6_10, pam_ssh_agent_auth-0.9.3-124.el6_10.ppc
    • Red Hat Enterprise Linux Workstation (v. 6) openssh-5.3p1-124.el6_10, openssh-askpass-5.3p1-124.el6_10, openssh-clients-5.3p1-124.el6_10 +1
    • Red Hat Enterprise Linux Workstation Optional (v. 6) openssh-ldap-5.3p1-124.el6_10, pam_ssh_agent_auth-0.9.3-124.el6_10

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 5AffectedNo fix planned: Will not fix
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2019:2143
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2019:2143
Red Hat Enterprise Linux ComputeNode (v. 7)Fixed RHSA-2019:2143
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2019:2143
Red Hat Enterprise Linux Desktop (v. 6)Fixed RHSA-2019:0711
Red Hat Enterprise Linux Desktop Optional (v. 6)Fixed RHSA-2019:0711
Red Hat Enterprise Linux HPC Node (v. 6)Fixed RHSA-2019:0711
Red Hat Enterprise Linux HPC Node Optional (v. 6)Fixed RHSA-2019:0711
Red Hat Enterprise Linux Server (v. 6)Fixed RHSA-2019:0711
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2019:2143
Red Hat Enterprise Linux Server Optional (v. 6)Fixed RHSA-2019:0711
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2019:2143
Red Hat Enterprise Linux Workstation (v. 6)Fixed RHSA-2019:0711
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2019:2143
Red Hat Enterprise Linux Workstation Optional (v. 6)Fixed RHSA-2019:0711
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2019:2143
Not affected: 1 product
  • Red Hat Enterprise Linux 8

Timeline

  1. 2026-10-02 Threatist record created from CVE-2018-15473
  2. 2026-10-03 Alias added: GHSA-c8qw-h3f6-fv63

References

Exploit 3

Patch 5

Advisory 8

Sources

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