CVE-2017-15906

NameCVE-2017-15906
DescriptionThe 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
ReferencesDLA-1500-1
NVD severitymedium (attack range: remote)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
openssh (PTS)jessie1:6.7p1-5+deb8u4vulnerable
jessie (security)1:6.7p1-5+deb8u8fixed
stretch1:7.4p1-10+deb9u7fixed
stretch (security)1:7.4p1-10+deb9u6fixed
buster1:7.9p1-10fixed
bullseye, sid1:8.0p1-6fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
opensshsource(unstable)1:7.6p1-1low
opensshsourcejessie1:6.7p1-5+deb8u6mediumDLA-1500-1
opensshsourcestretch1:7.4p1-10+deb9u3medium

Notes

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

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