CVE-2019-10167: Path Traversal
First published: Thu Jun 13 2019(Updated: )
The virConnectGetDomainCapabilities() libvirt API, versions 4.x.x before 4.10.1 and 5.x.x before 5.4.1, accepts an "emulatorbin" argument to specify the program providing emulation for a domain. Since v1.2.19, libvirt will execute that program to probe the domain's capabilities. Read-only clients could specify an arbitrary path for this argument, causing libvirtd to execute a crafted executable with its own privileges.
Credit: secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/libvirt | <0:4.5.0-10.el7_6.12 | 0:4.5.0-10.el7_6.12 |
| redhat/redhat-release-virtualization-host | <0:4.3.4-1.el7e | 0:4.3.4-1.el7e |
| redhat/redhat-virtualization-host | <0:4.3.4-20190620.3.el7_6 | 0:4.3.4-20190620.3.el7_6 |
| Redhat Libvirt | >=4.0.0<4.10.1 | |
| Redhat Libvirt | >=5.0.0<5.4.1 | |
| Redhat Enterprise Linux | =7.0 | |
| Redhat Enterprise Linux | =8.0 | |
| Redhat Enterprise Linux Desktop | =6.0 | |
| Redhat Enterprise Linux Desktop | =7.0 | |
| Redhat Enterprise Linux Server | =6.0 | |
| Redhat Enterprise Linux Server | =7.0 | |
| Redhat Enterprise Linux Server Aus | =7.6 | |
| Redhat Enterprise Linux Server Eus | =7.6 | |
| Redhat Enterprise Linux Server Tus | =7.6 | |
| Redhat Enterprise Linux Workstation | =6.0 | |
| Redhat Enterprise Linux Workstation | =7.0 | |
| Redhat Virtualization | =4.3 | |
| ubuntu/libvirt | <4.0.0-1ubuntu8.12 | 4.0.0-1ubuntu8.12 |
| ubuntu/libvirt | <4.6.0-2ubuntu3.8 | 4.6.0-2ubuntu3.8 |
| ubuntu/libvirt | <5.0.0-1ubuntu2.4 | 5.0.0-1ubuntu2.4 |
| ubuntu/libvirt | <5.4.0-0ubuntu3 | 5.4.0-0ubuntu3 |
| ubuntu/libvirt | <1.3.1-1ubuntu10.27 | 1.3.1-1ubuntu10.27 |
| redhat/libvirt | <4.10.1 | 4.10.1 |
| redhat/libvirt | <5.4.1 | 5.4.1 |
| debian/libvirt | 5.0.0-4+deb10u1 5.0.0-4+deb10u2 7.0.0-3+deb11u2 9.0.0-4 10.0.0-2 10.2.0-1 |
Remedy
The Unix permissions of libvirt's read-only socket can be made more restrictive than the default (0777) by editing `/etc/libvirt/libvirtd.conf`. The settings `unix_sock_group = libvirt` and `unix_sock_ro_perms = 0770` will restrict access to only members of `libvirt`, who already have management access to virtual machines.
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
- https://www.cve.org/CVERecord?id=CVE-2019-10167 https://nvd.nist.gov/vuln/detail/CVE-2019-10167 https://access.redhat.com/libvirt-privesc-vulnerabilities
- https://bugzilla.redhat.com/show_bug.cgi?id=1720117
- https://access.redhat.com/errata/RHSA-2019:1579
- https://access.redhat.com/errata/RHSA-2019:1580
- https://access.redhat.com/errata/RHSA-2019:1762
- https://access.redhat.com/errata/RHSA-2019:1699
- https://access.redhat.com/security/cve/cve-2019-10167
- https://access.redhat.com/libvirt-privesc-vulnerabilities
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-10167
- https://security.gentoo.org/glsa/202003-18
- https://launchpad.net/bugs/cve/CVE-2019-10167
- https://libvirt.org/git/?p=libvirt.git;a=commit;h=8afa68bac0cf99d1f8aaa6566685c43c22622f26
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1722464
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1722468
- https://security-tracker.debian.org/tracker/CVE-2019-10167
- https://rhn.redhat.com/errata/RHSA-2019-1579.html
- https://security.libvirt.org/2019/0006.html
- https://ubuntu.com/security/notices/USN-4047-1
- https://www.cve.org/CVERecord?id=CVE-2019-10167
- https://nvd.nist.gov/vuln/detail/CVE-2019-10167
- http://libvirt.org/git/?p=libvirt.git;a=commit;h=58f237d696310f3ac62e98b3b5e9cb98e13064e9
- http://libvirt.org/git/?p=libvirt.git;a=commit;h=93edb0ea630556569320de83d45b100718f1391f
- http://libvirt.org/git/?p=libvirt.git;a=commit;h=585be8edbef5ce4ef30e6c20386358ca1ba8e344
- http://libvirt.org/git/?p=libvirt.git;a=commit;h=be5d96d547ec54bc35e5eab6472ec900184ae837
- https://ubuntu.com/security/CVE-2019-10167
Parent vulnerabilities
(Appears in the following advisories)
Frequently Asked Questions
What is CVE-2019-10167?
CVE-2019-10167 is a vulnerability in the libvirt API that allows for privilege escalation.
How severe is CVE-2019-10167?
CVE-2019-10167 has a severity value of 8.8, which is considered high.
Which versions of libvirt are affected?
Versions 4.x.x before 4.10.1 and 5.x.x before 5.4.1 of libvirt are affected.
How can I fix CVE-2019-10167?
To fix CVE-2019-10167, update libvirt to version 4.10.1 or higher for 4.x.x series, or version 5.4.1 or higher for 5.x.x series.
Where can I find more information about CVE-2019-10167?
You can find more information about CVE-2019-10167 at the following sources: [Red Hat Advisory](https://access.redhat.com/libvirt-privesc-vulnerabilities), [libvirt Git commit](https://libvirt.org/git/?p=libvirt.git;a=commit;h=8afa68bac0cf99d1f8aaa6566685c43c22622f26), [Red Hat Bugzilla](https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1722464).
- collector/redhat-cve
- collector/nvd-index
- agent/type
- agent/first-publish-date
- collector/launchpad-cve
- source/Launchpad
- agent/author
- collector/nvd-cve
- source/NVD
- agent/software-canonical-lookup
- agent/weakness
- agent/severity
- agent/remedy
- agent/references
- agent/tags
- agent/description
- agent/event
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2019-10167
- agent/last-modified-date
- collector/security-tracker-debian
- source/Debian
- agent/softwarecombine
- collector/usn-cve
- source/Ubuntu
- package-manager/redhat
- vendor/redhat
- canonical/redhat libvirt
- version/redhat libvirt/4.0.0
- version/redhat libvirt/5.0.0
- canonical/redhat enterprise linux
- version/redhat enterprise linux/7.0
- version/redhat enterprise linux/8.0
- canonical/redhat enterprise linux desktop
- version/redhat enterprise linux desktop/6.0
- version/redhat enterprise linux desktop/7.0
- canonical/redhat enterprise linux server
- version/redhat enterprise linux server/6.0
- version/redhat enterprise linux server/7.0
- canonical/redhat enterprise linux server aus
- version/redhat enterprise linux server aus/7.6
- canonical/redhat enterprise linux server eus
- version/redhat enterprise linux server eus/7.6
- canonical/redhat enterprise linux server tus
- version/redhat enterprise linux server tus/7.6
- canonical/redhat enterprise linux workstation
- version/redhat enterprise linux workstation/6.0
- version/redhat enterprise linux workstation/7.0
- canonical/redhat virtualization
- version/redhat virtualization/4.3
- package-manager/debian
- package-manager/ubuntu