CVE-2020-14339 Information disclosure in libvirt
A libvirt flaw leaks a privileged device-mapper file descriptor to QEMU, allowing malicious guests to compromise the host system.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2020-14339?
CVE-2020-14339 is a high-severity vulnerability in Redhat Enterprise Linux, published on 3 Dec 2020. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A 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.
Weakness: CWE-772
Which versions are affected by CVE-2020-14339?
It affects 2 products.
Linux distribution packages (8)
libvirt SUSE:Linux Enterprise Module for Basesystem 15 SP1 | All versions | 5.1.0-8.19.1 |
libvirt SUSE:Linux Enterprise Module for Basesystem 15 SP2 | All versions | 6.0.0-13.3.1 |
libvirt SUSE:Linux Enterprise Module for Server Applications 15 SP1 | All versions | 5.1.0-8.19.1 |
libvirt SUSE:Linux Enterprise Module for Server Applications 15 SP2 | All versions | 6.0.0-13.3.1 |
libvirt SUSE:Linux Enterprise Server 12 SP5 | All versions | 5.1.0-13.9.1 |
libvirt SUSE:Linux Enterprise Server for SAP Applications 12 SP5 | All versions | 5.1.0-13.9.1 |
libvirt SUSE:Linux Enterprise Software Development Kit 12 SP5 | All versions | 5.1.0-13.9.1 |
libvirt openSUSE:Leap 15.2 | All versions | 6.0.0-lp152.9.3.1 |
Products include Redhat Enterprise Linux, Redhat Libvirt.
How do I fix CVE-2020-14339?
Apply the vendor's patch.
Is CVE-2020-14339 being exploited?
There is no known exploitation of CVE-2020-14339 in the wild and no public exploit code.
Other vulnerabilities in Redhat Enterprise Linux
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- CVE-2021-20325 Missing fixes for CVE-2021-40438 and CVE-2021-26691 in the versions of httpd, as shipped in Red Hat Enterprise Linux 8.5.0, causes a securit
- CVE-2018-25011 Memory corruption in libwebp
- CVE-2018-25014 Other in libwebp
- CVE-2014-3585 Supply chain in redhat-upgrade-tool
Sources
Also known as ALPINE-CVE-2020-14339, DEBIAN-CVE-2020-14339, GHSA-c772-g5j9-w9w8, OESA-2021-1010, SUSE-SU-2020:2233-1, SUSE-SU-2020:2237-1 and 2 more.