Home/CVE/The process_open function in sftp-server.c in OpenSSH before 7.6 does not properly prevent write operations in readonly
CVE

CVE-2017-15906

The process_open function in sftp-server.c in OpenSSH before 7.6 does not properly prevent write operations in readonly

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.

MEDIUM · CVSS 5.3 EPSS 0.02659
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules2 YARA rules0
⬡

Weakness Classification

CWE-732Incorrect Permission Assignment for Critical Resource
▤

Affected Products & Versions

24
openbsd openssh< 7.6
oracle sun zfs storage appliance kitall versions
debian linuxall versions
netapp active iq unified managerall versions
netapp cloud backupall versions
netapp clustered data ontapall versions
netapp data ontap edgeall versions
netapp hci management nodeall versions
◈

Sigma Hunt Rules

2
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
productmediumSuspicious OpenSSH Daemon Error
productmediumOpenSSH Server Listening On Socket
▣

Scoring & Timeline

5.3
MEDIUM · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD26 Oct 2017 · 03:29 AM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
⚑

Vendor Advisories

10
siemens-csafSSA-412672
suse-csafSUSE-SU-2018:3540-1
suse-csafSUSE-SU-2018:2719-1
suse-csafSUSE-SU-2018:2685-1
suse-csafSUSE-SU-2018:2275-1
🔗

References & Sources

8
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://www.securityfocus.com/bid/101552Third Party AdvisoryVDB Entry
https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf
https://github.com/openbsd/src/commit/a6981567e8e215acc1ef690c8dbb30f2d9b00a19Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/09/msg00010.htmlMailing ListThird Party Advisory
https://security.gentoo.org/glsa/201801-05Third Party Advisory
https://security.netapp.com/advisory/ntap-20180423-0004/Third Party Advisory
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