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Vulnerability record · CVE-2017-15906 · published 26 October 2017

CVE-2017-15906: Openbsd openssh incorrect permission assignment vulnerability

Openbsd · Openssh

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.

5.3 CVSS 3.1 Medium EPSS 3.4% · top 11.7% CWE-732 · Incorrect permission assignment
5.3CVSS 3.1 base score, v2 5.0
3.4%EPSS exploitation probability, 30 days
NoNot in CISA KEV
21Affected product versions listed by NVD
18References
17 Jun 2026Last modified by NVD

Description

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.

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

Affected products

21 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

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Source: NIST National Vulnerability Database (record CVE-2017-15906), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.