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CVE-2017-15906

21
FAUCET Score

CVE-2017-15906 is a medium-severity vulnerability affecting OpenSSH versions prior to 7.6, as well as products from Debian, NetApp, OpenBSD, Oracle, and Red Hat. It allows remote attackers to create zero-length files in read-only mode due to improper write prevention in the sftp-server.c process_open function. The attack is low complexity and does not require user interaction, but its impact is limited to data integrity (creating empty files). There is no known active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or inclusion in CISA's KEV catalog, though it has received some community discussion and media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 7.6CPE matchmatch criteria
cpe:2.3:a:openbsd:openssh:*:*:*:*:*:*:*:*
8.8.6CPE matchmatch criteria
cpe:2.3:a:oracle:sun_zfs_storage_appliance_kit:8.8.6:*:*:*:*:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.3MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
3.36%
Probability of exploitation in next 30 days
EPSS Percentile
87.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0336 is in the 83rd percentile among its peer group of 23,701 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: openssh-0:7.4p1-16.el7
View patch

Vendor Advisories (1)

redhatCVE-2017-15906Low

openssh: Improper write operations in readonly mode allow for zero-length file creation

Oct 3, 2017

References

access.redhat.com / errata/RHSA-2018:0980
Third Party Advisory
cert-portal.siemens.com / productcert/pdf/ssa-412672.pdf
github.com / openbsd/src/commit/a6981567e8e215acc1ef690c8dbb30f2d9b00a19
Third Party Advisory
lists.debian.org / debian-lts-announce/2018/09/msg00010.html
Mailing ListThird Party Advisory
security.gentoo.org / glsa/201801-05
Third Party Advisory
security.netapp.com / advisory/ntap-20180423-0004
Third Party Advisory
openssh.com / txt/release-7.6
Release NotesVendor Advisory
oracle.com / security-alerts/cpujan2020.html
Third Party Advisory
securityfocus.com / bid/101552
Third Party AdvisoryVDB Entry