CVE-2017-8921

NameCVE-2017-8921
DescriptionIn FlightGear before 2017.2.1, the FGCommand interface allows overwriting any file the user has write access to, but not with arbitrary data: only with the contents of a FlightGear flightplan (XML). A resource such as a malicious third-party aircraft could exploit this to damage files belonging to the user. Both this issue and CVE-2016-9956 are directory traversal vulnerabilities in Autopilot/route_mgr.cxx - this one exists because of an incomplete fix for CVE-2016-9956.
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)
NVD severitymedium (attack range: remote)
Debian Bugs862689

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
flightgear (PTS)jessie3.0.0-5+deb8u3fixed
jessie (security)3.0.0-5+deb8u1vulnerable
stretch1:2016.4.4+dfsg-3+deb9u1fixed
sid1:2017.3.1+dfsg-3fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
flightgearsource(unstable)1:2016.4.4+dfsg-3medium862689
flightgearsourcejessie3.0.0-5+deb8u2medium

Notes

Fixed by: https://sourceforge.net/p/flightgear/flightgear/ci/faf872e7f71ca14c567ac7080561fc785d8d2fd0/ (next)
Fixed by: https://sourceforge.net/p/flightgear/flightgear/ci/19ab09406e4249f2c6f8ac51938258d1c51eace0/ (2016.4)
Fixed by: https://sourceforge.net/p/flightgear/flightgear/ci/c8250b10bb9a116889f831d2299678b0ef70fec2/ (3.0.0)

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