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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, ...

Public exploit available. Not confirmed exploited in the wild yet. A vendor fix is available.

CVSS 3.15.3MediumEPSS percentile99th99% chance in 30 daysCISA KEVNot listedNo confirmed exploitation
Public exploit: 6 sourcesFixVendor fixNo build named by the sources
Check it yourself

Nuclei · 1 templateOpenVAS · 43 checks

e.g. OpenSSH Username Enumeration <= v7.7 · OID 1.3.6.1.4.1.25623.1.0.143407

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Published Updated Sources: CVE.org, NVD, BDU, CSAF

NVD CVE.org

What to do

The vendor has published a fix. Version details are below where the sources state them.

  • Openbsd OpensshAffected: ≤ 7.7Upgrade to: after 7.7Stated by: NVD
  • Netapp Oncommand Unified ManagerAffected: 9.4Upgrade to: not statedStated by: NVD
  • Netapp Virtual Storage ConsoleAffected: 7.2Upgrade to: not statedStated by: NVD
  • Netapp Vasa ProviderAffected: 7.2Upgrade to: not statedStated by: NVD
  • Netapp Storage Replication AdapterAffected: 7.2Upgrade to: not statedStated by: NVD

Versions as the sources state them. 5 more products have version data. Full version matrix after sign-in

Check it yourselfA free Nuclei and OpenVAS check exists for this CVE. Run it against your hosts.Is your organisation exposed?Discuss checks for your systems with a specialist. Scope is agreed before testing.

What it is

From the CVE record

SCALANCE X-200RNA switch devices before V3.2.7 contain multiple OpenSSL and OpenSSH vulnerabilities. The most severe of these vulnerabilities could allow a denial of service condition or could lead to execution of arbitrary code. Siemens has released updates for the affected products and recommends to update to the latest versions.

In plain language

No plain-language summary for this CVE yet.

Exploitation

Where each signal puts this CVE on the scale from published to confirmed exploited.

EPSS99th
Public exploit
CISA KEV

Not in the catalog. CISA has not confirmed exploitation.

Public exploits

6 sources with a proof of concept or module.

Exploit links, PoCs and Metasploit modules after sign-in
EPSS

99% chance of exploitation activity in the next 30 days, which ranks it in the 99th percentile of scored CVEs.

Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.

Lifecycle

The patch came 79 days before any public exploit.

  1. OpenVAS check added
  2. Public exploit / PoCsource: exploit-dbnuclei check added
  3. Patch availablerecord updated
  4. Publishedweakness classified, att&ck mapped

Affected products

And 14 more affected products. See all after sign-in

Technical detail

CVSS 3.1 vector

Open in the CVSS calculator

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

Scored 5.3 by NVD.

How it is reached

  • Attack Vector NetworkExploitable remotely over the network without any special conditions
  • Attack Complexity LowNo special conditions — the attack can be reliably reproduced
  • Privileges Required NoneNo authentication required — anyone can exploit this
  • User Interaction NoneNo user interaction needed — fully automated exploitation

Scope

  • Scope UnchangedImpact is limited to the vulnerable component itself

Impact if exploited

  • Confidentiality LowSome restricted information is disclosed, but limited in scope
  • Integrity NoneNo integrity impact
  • Availability NoneNo availability impact

Weaknesses

ATT&CK techniques

Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.

Sources

References in the record

And 42 more references. See all after sign-in

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