CVE-2017-15906

Name	CVE-2017-15906
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.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
References	DLA-1500-1
NVD severity	medium (attack range: remote)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
openssh (PTS)	jessie	1:6.7p1-5+deb8u4	vulnerable
	jessie (security)	1:6.7p1-5+deb8u7	fixed
	stretch (security), stretch	1:7.4p1-10+deb9u4	fixed
	buster, sid	1:7.9p1-5	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin
openssh	source	(unstable)	1:7.6p1-1	low
openssh	source	jessie	1:6.7p1-5+deb8u6	medium	DLA-1500-1
openssh	source	stretch	1:7.4p1-10+deb9u3	medium

[wheezy] - openssh <no-dsa> (Minor issue)
https://github.com/openbsd/src/commit/a6981567e8e215acc1ef690c8dbb30f2d9b00a19