CVE-2020-14339

NameCVE-2020-14339
DescriptionA flaw was found in libvirt, where it leaked a file descriptor for `/dev/mapper/control` into the QEMU process. This file descriptor allows for privileged operations to happen against the device-mapper on the host. This flaw allows a malicious guest user or process to perform operations outside of their standard permissions, potentially causing serious damage to the host operating system. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.
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 severityhigh
Debian Bugs966563

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
libvirt (PTS)stretch3.0.0-4+deb9u4fixed
stretch (security)3.0.0-4+deb9u5fixed
buster5.0.0-4+deb10u1fixed
bullseye7.0.0-3fixed
bookworm, sid7.6.0-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
libvirtsourcestretch(not affected)
libvirtsourcebuster(not affected)
libvirtsource(unstable)6.6.0-1966563

Notes

[buster] - libvirt <not-affected> (Vulnerable code introduced later)
[stretch] - libvirt <not-affected> (Vulnerable code introduced later)
https://bugzilla.redhat.com/show_bug.cgi?id=1860069
https://www.redhat.com/archives/libvir-list/2020-July/msg01500.html
Proposed patch: https://www.redhat.com/archives/libvir-list/2020-July/msg01501.html
https://libvirt.org/git/?p=libvirt.git;a=commit;h=22494556542c676d1b9e7f1c1f2ea13ac17e1e3e (v6.6.0)

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