Vulnerability Details : CVE-2018-15473
Public exploit exists!
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.
Products affected by CVE-2018-15473
- cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*
- cpe:2.3:a:oracle:sun_zfs_storage_appliance_kit:8.8.6:*:*:*:*:*:*:*
- cpe:2.3:a:openbsd:openssh:*:*:*:*:*:*:*:*
- cpe:2.3:o:siemens:scalance_x204rna_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
- cpe:2.3:o:netapp:data_ontap:-:*:*:*:*:7-mode:*:*
- cpe:2.3:o:netapp:clustered_data_ontap:-:*:*:*:*:*:*:*
- cpe:2.3:a:netapp:vasa_provider:*:*:*:*:*:*:*:*
- cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:*
- cpe:2.3:a:netapp:oncommand_unified_manager:*:*:*:*:*:vsphere:*:*
- cpe:2.3:a:netapp:data_ontap_edge:-:*:*:*:*:*:*:*
- cpe:2.3:a:netapp:ontap_select_deploy:-:*:*:*:*:*:*:*
- cpe:2.3:a:netapp:steelstore_cloud_integrated_storage:-:*:*:*:*:*:*:*
- cpe:2.3:a:netapp:service_processor:-:*:*:*:*:*:*:*
- cpe:2.3:o:netapp:cn1610_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:a:netapp:aff_baseboard_management_controller:-:*:*:*:*:*:*:*
- cpe:2.3:a:netapp:fas_baseboard_management_controller:-:*:*:*:*:*:*:*
- cpe:2.3:a:netapp:virtual_storage_console:*:*:*:*:*:vsphere:*:*
- cpe:2.3:a:netapp:storage_replication_adapter:*:*:*:*:*:vsphere:*:*
Threat overview for CVE-2018-15473
Top countries where our scanners detected CVE-2018-15473
Top open port discovered on systems with this issue
22
IPs affected by CVE-2018-15473 22,386,385
Threat actors abusing to this issue?
Yes
Find out if you* are
affected by CVE-2018-15473!
*Directly or indirectly through your vendors, service providers and 3rd parties.
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attack surface intelligence
from SecurityScorecard.
Exploit prediction scoring system (EPSS) score for CVE-2018-15473
90.53%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 100 %
Percentile, the proportion of vulnerabilities that are scored at or less
Metasploit modules for CVE-2018-15473
-
SSH Username Enumeration
First seen: 2020-04-26auxiliary/scanner/ssh/ssh_enumusersThis module uses a malformed packet or timing attack to enumerate users on an OpenSSH server. The default action sends a malformed (corrupted) SSH_MSG_USERAUTH_REQUEST packet using public key authentication (must be enabled) to enumerate users. On
CVSS scores for CVE-2018-15473
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.0
|
MEDIUM | AV:N/AC:L/Au:N/C:P/I:N/A:N |
10.0
|
2.9
|
NIST | |
|
5.3
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
3.9
|
1.4
|
NIST |
CWE ids for CVE-2018-15473
-
The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.Assigned by: nvd@nist.gov (Primary)
References for CVE-2018-15473
-
https://github.com/openbsd/src/commit/779974d35b4859c07bc3cb8a12c74b43b0a7d1e0
delay bailout for invalid authenticating user until after the packet · openbsd/src@779974d · GitHubPatch
-
https://usn.ubuntu.com/3809-1/
USN-3809-1: OpenSSH vulnerabilities | Ubuntu security noticesThird Party Advisory
-
http://www.openwall.com/lists/oss-security/2018/08/15/5
oss-security - OpenSSH Username EnumerationMailing List;Patch;Third Party Advisory
-
https://www.oracle.com/security-alerts/cpujan2020.html
Oracle Critical Patch Update Advisory - January 2020Patch;Third Party Advisory
-
http://www.securityfocus.com/bid/105140
OpenSSH CVE-2018-15473 User Enumeration VulnerabilityBroken Link;Third Party Advisory;VDB Entry
-
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2018-0011
SonicWall Security AdvisoryThird Party Advisory
-
https://www.exploit-db.com/exploits/45233/
OpenSSH 2.3 < 7.7 - Username EnumerationExploit;Third Party Advisory;VDB Entry
-
https://www.debian.org/security/2018/dsa-4280
Debian -- Security Information -- DSA-4280-1 opensshThird Party Advisory
-
https://security.gentoo.org/glsa/201810-03
OpenSSH: User enumeration vulnerability (GLSA 201810-03) — Gentoo securityThird Party Advisory
-
http://www.securitytracker.com/id/1041487
OpenSSH Authentication Attempt Processing Lets Remote Users Determine Valid Usernames on the Target System - SecurityTrackerBroken Link;Patch;Third Party Advisory;VDB Entry
-
https://access.redhat.com/errata/RHSA-2019:2143
RHSA-2019:2143 - Security Advisory - Red Hat Customer PortalThird Party Advisory
-
https://access.redhat.com/errata/RHSA-2019:0711
RHSA-2019:0711 - Security Advisory - Red Hat Customer PortalThird Party Advisory
-
https://www.exploit-db.com/exploits/45210/
OpenSSH 2.3 < 7.7 - Username Enumeration (PoC)Exploit;Third Party Advisory;VDB Entry
-
https://bugs.debian.org/906236
#906236 - openssh: CVE-2018-15473: delay bailout for invalid authenticating user until after the packet - Debian Bug report logsIssue Tracking;Mailing List;Patch;Third Party Advisory
-
https://security.netapp.com/advisory/ntap-20181101-0001/
CVE-2018-15473 OpenSSH Username Enumeration Vulnerability in NetApp Products | NetApp Product SecurityThird Party Advisory
-
https://lists.debian.org/debian-lts-announce/2018/08/msg00022.html
[SECURITY] [DLA-1474-1] openssh security updateMailing List;Third Party Advisory
-
https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf
Patch;Third Party Advisory
-
https://www.exploit-db.com/exploits/45939/
OpenSSH < 7.7 - User Enumeration (2)Exploit;Third Party Advisory;VDB Entry
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