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CVE-2018-15473

CWE-362Published: August 17, 2018· Updated: Jun 17, 2026

5.3

CVSS v3.1

Official 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.

Technical Analysis

CVE-2018-15473 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A proof-of-concept (PoC) exploit exists for CVE-2018-15473. While not yet confirmed in active campaigns, the availability of PoC code increases exploitation risk substantially.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.None

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityNone

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Affected Vendors & Products

Canonical1 product(s)

ubuntu linux

Debian1 product(s)

debian linux

netapp15 product(s)

cn1610 firmwarecn1610aff baseboard management controllercloud backupdata ontap edgefas baseboard management controlleroncommand unified managerontap select deployservice processorsteelstore cloud integrated storagevirtual storage consoleclustered data ontap+3

openbsd1 product(s)

openssh

Oracle1 product(s)

sun zfs storage appliance kit

Red Hat3 product(s)

enterprise linux desktopenterprise linux serverenterprise linux workstation

siemens2 product(s)

scalance x204rna firmwarescalance x204rna

Source: NVD CPE · 30 total CPE entries

Exploit & PoC Resources

POC AVAILABLEProof-of-concept code exists

Offensive Security exploit database

GitHub PoC Search

Community PoC repositories

Rapid7 / Metasploit

Metasploit module search

Security advisories & exploits

Official NIST entry

CVE Program entry

External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttp://www.openwall.com/lists/oss-security/2018/08/15/5

PATCHhttp://www.securitytracker.com/id/1041487

PATCHhttps://bugs.debian.org/906236

PATCHhttps://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf

PATCHhttps://github.com/openbsd/src/commit/779974d35b4859c07bc3cb8a12c74b43b0a7d1e0

PATCHhttps://www.oracle.com/security-alerts/cpujan2020.html

PATCHhttp://www.openwall.com/lists/oss-security/2018/08/15/5

PATCHhttp://www.securitytracker.com/id/1041487

PATCHhttps://bugs.debian.org/906236

PATCHhttps://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf

PATCHhttps://github.com/openbsd/src/commit/779974d35b4859c07bc3cb8a12c74b43b0a7d1e0

PATCHhttps://www.oracle.com/security-alerts/cpujan2020.html

ADVISORYhttp://www.securityfocus.com/bid/105140

ADVISORYhttps://access.redhat.com/errata/RHSA-2019:0711

ADVISORYhttps://access.redhat.com/errata/RHSA-2019:2143

ADVISORYhttps://lists.debian.org/debian-lts-announce/2018/08/msg00022.html

ADVISORYhttps://psirt.global.sonicwall.com/vuln-detail/SNWLID-2018-0011

ADVISORYhttps://security.gentoo.org/glsa/201810-03

ADVISORYhttps://security.netapp.com/advisory/ntap-20181101-0001/

ADVISORYhttps://usn.ubuntu.com/3809-1/

ADVISORYhttps://www.debian.org/security/2018/dsa-4280

ADVISORYhttps://www.exploit-db.com/exploits/45210/

ADVISORYhttps://www.exploit-db.com/exploits/45233/

ADVISORYhttps://www.exploit-db.com/exploits/45939/

ADVISORYhttp://www.securityfocus.com/bid/105140

ADVISORYhttps://access.redhat.com/errata/RHSA-2019:0711

ADVISORYhttps://access.redhat.com/errata/RHSA-2019:2143

ADVISORYhttps://lists.debian.org/debian-lts-announce/2018/08/msg00022.html

ADVISORYhttps://psirt.global.sonicwall.com/vuln-detail/SNWLID-2018-0011

ADVISORYhttps://security.gentoo.org/glsa/201810-03

ADVISORYhttps://security.netapp.com/advisory/ntap-20181101-0001/

ADVISORYhttps://usn.ubuntu.com/3809-1/

ADVISORYhttps://www.debian.org/security/2018/dsa-4280

ADVISORYhttps://www.exploit-db.com/exploits/45210/

ADVISORYhttps://www.exploit-db.com/exploits/45233/

ADVISORYhttps://www.exploit-db.com/exploits/45939/

All References (36)

→

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://github.com/openbsd/src/commit/779974d35b4859c07bc3cb8a12c74b43b0a7d1e0Patch

→

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

Quick Facts

CVE IDCVE-2018-15473

CVSS Score5.3 / 10

SeverityMEDIUM

WeaknessCWE-362

CISA KEVNo

ExploitPOC

Affected7 vendor(s)

PublishedAug 17, 2018

Related CVEs (CWE-362)

Recommended Actions

→Apply vendor patches immediately
→Monitor CVE-2018-15473 in threat intel feeds
→Review IDS/IPS signatures for exploitation attempts

Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.

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