CVE-2017-15906
MEDIUMCVSS 5.3/10EPSS 3.36%
Last modified
CVE-2017-15906 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. 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.. EPSS estimates a 3.36% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Openbsd | Openssh | < 7.6 |
| Oracle | Sun Zfs Storage Appliance Kit | 8.8.6 |
| Debian | Debian Linux | 8.0 |
| Netapp | Active Iq Unified Manager | All versions |
| Netapp | Cloud Backup | All versions |
| Netapp | Clustered Data Ontap | All versions |
| Netapp | Data Ontap Edge | All versions |
| Netapp | Hci Management Node | All versions |
| Netapp | Oncommand Unified Manager Core Package | All versions |
| Netapp | Solidfire | All versions |
| Netapp | Steelstore Cloud Integrated Storage | All versions |
| Netapp | Storage Replication Adapter For Clustered Data Ontap | >= 9.7 |
| Netapp | Storage Replication Adapter For Clustered Data Ontap | 9.6 |
| Netapp | Vasa Provider For Clustered Data Ontap | >= 6.0, <= 6.2 |
| Netapp | Vasa Provider For Clustered Data Ontap | >= 9.7 |
| Netapp | Virtual Storage Console | >= 9.7 |
| Netapp | Virtual Storage Console | 9.6 |
| Netapp | Cn1610 Firmware | All versions |
| Redhat | Enterprise Linux Desktop | 7.0 |
| Redhat | Enterprise Linux Eus | 7.6 |
| Redhat | Enterprise Linux Eus | 7.7 |
| Redhat | Enterprise Linux Server | 7.0 |
| Redhat | Enterprise Linux Server Aus | 7.6 |
| Redhat | Enterprise Linux Server Aus | 7.7 |
| Redhat | Enterprise Linux Server Tus | 7.6 |
| Redhat | Enterprise Linux Server Tus | 7.7 |
| Redhat | Enterprise Linux Workstation | 7.0 |
References
- http://www.securityfocus.com/bid/101552Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2018:0980Third Party Advisory
- https://github.com/openbsd/src/commit/a6981567e8e215acc1ef690c8dbb30f2d9b00a19Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/09/msg00010.htmlMailing List, Third Party Advisory
- https://security.gentoo.org/glsa/201801-05Third Party Advisory
- https://security.netapp.com/advisory/ntap-20180423-0004/Third Party Advisory
- https://www.openssh.com/txt/release-7.6Release Notes, Vendor Advisory
- https://www.oracle.com/security-alerts/cpujan2020.htmlThird Party Advisory
- http://www.securityfocus.com/bid/101552Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2018:0980Third Party Advisory
- https://github.com/openbsd/src/commit/a6981567e8e215acc1ef690c8dbb30f2d9b00a19Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/09/msg00010.htmlMailing List, Third Party Advisory
- https://security.gentoo.org/glsa/201801-05Third Party Advisory
- https://security.netapp.com/advisory/ntap-20180423-0004/Third Party Advisory
- https://www.openssh.com/txt/release-7.6Release Notes, Vendor Advisory
- https://www.oracle.com/security-alerts/cpujan2020.htmlThird Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is 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.
How severe is CVE-2017-15906?
CVE-2017-15906 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 3.36% probability of exploitation in the next 30 days.
How do I fix CVE-2017-15906?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
Are you affected by CVE-2017-15906?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST