DescriptionA double free memory issue was found to occur in the libvirt API, in versions before 6.8.0, responsible for requesting information about network interfaces of a running QEMU domain. This flaw affects the polkit access control driver. Specifically, clients connecting to the read-write socket with limited ACL permissions could use this flaw to crash the libvirt daemon, resulting in a denial of service, or potentially escalate their privileges on the system. The highest threat from this vulnerability is to data confidentiality and 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 Bugs971555

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
libvirt (PTS)stretch3.0.0-4+deb9u4vulnerable
stretch (security)3.0.0-4+deb9u5fixed
bullseye, sid7.0.0-3fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs


[buster] - libvirt <no-dsa> (Minor issue)
Introduced by:;a=commit;h=0977b8aa071de550e1a013d35e2c72615e65d520 (v1.2.14-rc1)
Fixed by:;a=commit;h=955029bd0ad7ef96000f529ac38204a8f4a96401 (v6.8.0)
Fixed by:;a=commit;h=50864dcda191eb35732dbd80fb6ca251a6bba923 (v6.8.0)
Fixed by:;a=commit;h=e4116eaa44cb366b59f7fe98f4b88d04c04970ad (v6.8.0)
Fixed by:;a=commit;h=a63b48c5ecef077bf0f909a85f453a605600cf05 (v6.8.0)

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