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Vulnerabilities

Vulnerability · CVE-2017-15906

The process_open function in sftp-server.c in OpenSSH before 7.6 does not properly prevent write operations in readonly mode, which allows attackers to create zero-length files.

Published Oct 26, 2017 · catalog updated Jun 17, 2026 · The process_open function in

Last checked Nov 4, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2017-15906. EPSS is 3.36%. Act only if a listed version of The process_open function in is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (The process_open function in).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
Medium5.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
3.36%
Remediation
Version ranges on file
Affected products
cpe debian/debian linux · cpe netapp/storage replication adapter for clustered data ontap · cpe netapp/vasa provider for clustered data ontap · cpe netapp/virtual storage console · cpe openbsd/openssh · cpe oracle/sun zfs storage appliance kit

The process_open function in sftp-server.c in OpenSSH before 7.6 does not properly prevent write operations in readonly mode, which allows attackers to create zero-length files.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe debian/debian linux8.0
  • cpe netapp/storage replication adapter for clustered data ontap9.6
  • cpe netapp/vasa provider for clustered data ontap>= 6.0, <= 6.2
  • cpe netapp/virtual storage console9.6
  • cpe openbsd/openssh< 7.6
  • cpe oracle/sun zfs storage appliance kit8.8.6

How to fix CVE-2017-15906

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2017-15906. EPSS is 3.36%. Act only if a listed version of The process_open function in is installed.

Which versions are affected?

Compare what you have installed with debian/debian linux 8.0; netapp/storage replication adapter for clustered data ontap 9.6; netapp/vasa provider for clustered data ontap >= 6.0, <= 6.2; netapp/virtual storage console 9.6. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-732: Incorrect Permission Assignment for Critical Resource. EPSS 3.36%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

OpenSSH security

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 26, 2017 · Monitored products — critical

    Detected

    The process_open function in sftp-server.c in OpenSSH before 7.6 does not properly prevent write operations in readonly mode, which allows attackers to create zero-length files.

  2. Jun 17, 2026 · Monitored products — critical

    Updated

    The process_open function in sftp-server.c in OpenSSH before 7.6 does not properly prevent write operations in readonly mode, which allows attackers to create zero-length files.

Sources

  • CVE.orgVulnerability recordCVE-2017-15906

    Official CVE identifier

    cve.org
  • Monitored products — criticalVendor advisoryCVE-2017-15906

    The process_open function in sftp-server.c in OpenSSH before 7.6 does not properly prevent write operations in readonly mode, which allows attackers to create zero-length files.

    nvd.nist.gov

References

Freshness

Last verified in this catalog Nov 4, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • CVE.orgNov 4, 2026
  • Monitored products — criticalNov 4, 2026