Resource management error in libvirt - CVE-2019-20485
Published: May 5, 2020
Vulnerability identifier: #VU27545
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2019-20485
CWE-ID: CWE-399
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: libvirt.org
Affected software:
libvirt
libvirt
Detailed vulnerability description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to improper management of internal resources with the qemu/qemu_driver.c in libvirt while holding of a monitor job during a query to a guest agent, which allows attackers to cause a denial of service (API blockage).
How to mitigate CVE-2019-20485
Install updates from vendor's website.
Sources
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=953078
- https://bugzilla.redhat.com/show_bug.cgi?id=1809740
- https://libvirt.org/git/?p=libvirt.git;a=commit;h=a663a860819287e041c3de672aad1d8543098ecc
- https://security-tracker.debian.org/tracker/CVE-2019-20485
- https://www.mail-archive.com/debian-bugs-dist@lists.debian.org/msg1730509.html