CVE-2018-15473
MEDIUMCVSS 5.3/10EPSS 98.63%
Last modified
CVE-2018-15473 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. 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.. EPSS estimates a 98.63% chance of exploitation in the next 30 days.
Description
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Openbsd | Openssh | <= 7.7 |
| Debian | Debian Linux | 8.0 |
| Debian | Debian Linux | 9.0 |
| Redhat | Enterprise Linux Desktop | 6.0 |
| Redhat | Enterprise Linux Desktop | 7.0 |
| Redhat | Enterprise Linux Server | 6.0 |
| Redhat | Enterprise Linux Server | 7.0 |
| Redhat | Enterprise Linux Workstation | 6.0 |
| Redhat | Enterprise Linux Workstation | 7.0 |
| Canonical | Ubuntu Linux | 14.04 |
| Canonical | Ubuntu Linux | 16.04 |
| Canonical | Ubuntu Linux | 18.04 |
| Netapp | Cn1610 Firmware | All versions |
| Netapp | Aff Baseboard Management Controller | All versions |
| Netapp | Cloud Backup | All versions |
| Netapp | Data Ontap Edge | All versions |
| Netapp | Fas Baseboard Management Controller | All versions |
| Netapp | Oncommand Unified Manager | >= 9.4 |
| Netapp | Ontap Select Deploy | All versions |
| Netapp | Service Processor | All versions |
| Netapp | Steelstore Cloud Integrated Storage | All versions |
| Netapp | Virtual Storage Console | >= 7.2 |
| Netapp | Clustered Data Ontap | All versions |
| Netapp | Data Ontap | All versions |
| Netapp | Vasa Provider | >= 7.2 |
| Netapp | Storage Replication Adapter | >= 7.2 |
| Oracle | Sun Zfs Storage Appliance Kit | 8.8.6 |
| Siemens | Scalance X204rna Firmware | < 3.2.7 |
References
- http://www.openwall.com/lists/oss-security/2018/08/15/5Mailing List, Patch, Third Party Advisory
- http://www.securityfocus.com/bid/105140Broken Link, Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1041487Broken Link, Patch, Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2019:0711Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:2143Third Party Advisory
- https://bugs.debian.org/906236Issue Tracking, Mailing List, Patch, Third Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdfPatch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/08/msg00022.htmlMailing List, Third Party Advisory
- https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2018-0011Third Party Advisory
- https://security.gentoo.org/glsa/201810-03Third Party Advisory
- https://security.netapp.com/advisory/ntap-20181101-0001/Third Party Advisory
- https://usn.ubuntu.com/3809-1/Third Party Advisory
- https://www.debian.org/security/2018/dsa-4280Third Party Advisory
- https://www.exploit-db.com/exploits/45210/Exploit, Third Party Advisory, VDB Entry
- https://www.exploit-db.com/exploits/45233/Exploit, Third Party Advisory, VDB Entry
- https://www.exploit-db.com/exploits/45939/Exploit, Third Party Advisory, VDB Entry
- https://www.oracle.com/security-alerts/cpujan2020.htmlPatch, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2018/08/15/5Mailing List, Patch, Third Party Advisory
- http://www.securityfocus.com/bid/105140Broken Link, Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1041487Broken Link, Patch, Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2019:0711Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:2143Third Party Advisory
- https://bugs.debian.org/906236Issue Tracking, Mailing List, Patch, Third Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdfPatch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/08/msg00022.htmlMailing List, Third Party Advisory
- https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2018-0011Third Party Advisory
- https://security.gentoo.org/glsa/201810-03Third Party Advisory
- https://security.netapp.com/advisory/ntap-20181101-0001/Third Party Advisory
- https://usn.ubuntu.com/3809-1/Third Party Advisory
- https://www.debian.org/security/2018/dsa-4280Third Party Advisory
- https://www.exploit-db.com/exploits/45210/Exploit, Third Party Advisory, VDB Entry
- https://www.exploit-db.com/exploits/45233/Exploit, Third Party Advisory, VDB Entry
- https://www.exploit-db.com/exploits/45939/Exploit, Third Party Advisory, VDB Entry
- https://www.oracle.com/security-alerts/cpujan2020.htmlPatch, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2018-15473?
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.
How severe is CVE-2018-15473?
CVE-2018-15473 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 98.63% probability of exploitation in the next 30 days.
How do I fix CVE-2018-15473?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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