Signature Detail
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Short Name |
SSH:OPENSSH:SFTP-DOS |
|---|---|
Severity |
Minor |
Recommended |
Yes |
Recommended Action |
Drop |
Category |
SSH |
Keywords |
OpenSSH SFTP Server Denial of Service |
Release Date |
2018/02/19 |
Update Number |
3038 |
Supported Platforms |
idp-4.0+, isg-3.4+, j-series-9.5+, mx-11.4+, srx-12.1+, srx-branch-12.1+, vmx-17.4+, vsrx-12.1+, vsrx3bsd-18.2+ |
SSH: OpenSSH SFTP Server Denial of Service
This signature detects attempts to exploit a known vulnerability against OpenSSH, SFTP server. A successful attack can result in a denial-of-service condition.
Extended 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.
Affected Products
- Openbsd openssh 1.2
- Openbsd openssh 1.2.1
- Openbsd openssh 1.2.2
- Openbsd openssh 1.2.27
- Openbsd openssh 1.2.3
- Openbsd openssh 1.3
- Openbsd openssh 1.5
- Openbsd openssh 1.5.7
- Openbsd openssh 1.5.8
- Openbsd openssh 2
- Openbsd openssh 2.1
- Openbsd openssh 2.1.1
- Openbsd openssh 2.2
- Openbsd openssh 2.3
- Openbsd openssh 2.3.1
- Openbsd openssh 2.5
- Openbsd openssh 2.5.1
- Openbsd openssh 2.5.2
- Openbsd openssh 2.9
- Openbsd openssh 2.9.9
- Openbsd openssh 2.9.9p2
- Openbsd openssh 2.9p1
- Openbsd openssh 2.9p2
- Openbsd openssh 3.0
- Openbsd openssh 3.0.1
- Openbsd openssh 3.0.1p1
- Openbsd openssh 3.0.2
- Openbsd openssh 3.0.2p1
- Openbsd openssh 3.0p1
- Openbsd openssh 3.1
- Openbsd openssh 3.1p1
- Openbsd openssh 3.2
- Openbsd openssh 3.2.2
- Openbsd openssh 3.2.2p1
- Openbsd openssh 3.2.3p1
- Openbsd openssh 3.3
- Openbsd openssh 3.3p1
- Openbsd openssh 3.4
- Openbsd openssh 3.4p1
- Openbsd openssh 3.5
- Openbsd openssh 3.5p1
- Openbsd openssh 3.6
- Openbsd openssh 3.6.1
- Openbsd openssh 3.6.1p1
- Openbsd openssh 3.6.1p2
- Openbsd openssh 3.7
- Openbsd openssh 3.7.1
- Openbsd openssh 3.7.1p1
- Openbsd openssh 3.7.1p2
- Openbsd openssh 3.8
- Openbsd openssh 3.8.1
- Openbsd openssh 3.8.1p1
- Openbsd openssh 3.9
- Openbsd openssh 3.9.1
- Openbsd openssh 3.9.1p1
- Openbsd openssh 4.0
- Openbsd openssh 4.0p1
- Openbsd openssh 4.1
- Openbsd openssh 4.1p1
- Openbsd openssh 4.2
- Openbsd openssh 4.2p1
- Openbsd openssh 4.3
- Openbsd openssh 4.3p1
- Openbsd openssh 4.3p2
- Openbsd openssh 4.4
- Openbsd openssh 4.4p1
- Openbsd openssh 4.5
- Openbsd openssh 4.6
- Openbsd openssh 4.7
- Openbsd openssh 4.7p1
- Openbsd openssh 4.8
- Openbsd openssh 4.9
- Openbsd openssh 5.0
- Openbsd openssh 5.1
- Openbsd openssh 5.2
- Openbsd openssh 5.3
- Openbsd openssh 5.4
- Openbsd openssh 5.5
- Openbsd openssh 5.6
- Openbsd openssh 5.7
- Openbsd openssh 5.8
- Openbsd openssh 5.8p2
- Openbsd openssh 5.9
- Openbsd openssh 6.0
- Openbsd openssh 6.1
- Openbsd openssh 6.2
- Openbsd openssh 6.3
- Openbsd openssh 6.4
- Openbsd openssh 6.5
- Openbsd openssh 6.6
- Openbsd openssh 6.7
- Openbsd openssh 6.8
- Openbsd openssh 6.9
- Openbsd openssh 7.0
- Openbsd openssh 7.1
- Openbsd openssh 7.2
- Openbsd openssh 7.3
- Openbsd openssh 7.4
- Openbsd openssh 7.5
References
- BugTraq: 101552
- CVE: CVE-2017-15906