CVE-2020-25637: Double Free
First published: Mon Sep 21 2020(Updated: )
A double free memory issue was found to occur in the libvirt API 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.
Credit: secalert@redhat.com secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/libvirt | <0:4.5.0-36.el7_9.3 | 0:4.5.0-36.el7_9.3 |
| Redhat Libvirt | <6.8.0 | |
| openSUSE Leap | =15.1 | |
| openSUSE Leap | =15.2 | |
| redhat/libvirt | <6.8.0 | 6.8.0 |
| debian/libvirt | 7.0.0-3+deb11u3 9.0.0-4+deb12u1 10.7.0-3 |
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-2020-25637 https://nvd.nist.gov/vuln/detail/CVE-2020-25637
- https://bugzilla.redhat.com/show_bug.cgi?id=1881037
- https://access.redhat.com/errata/RHSA-2020:5111
- https://access.redhat.com/errata/RHSA-2020:5040
- https://access.redhat.com/errata/RHSA-2021:1762
- https://access.redhat.com/security/cve/cve-2020-25637
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00072.html
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00073.html
- https://security.gentoo.org/glsa/202210-06
- https://libvirt.org/git/?p=libvirt.git;a=commit;h=0977b8aa071de550e1a013d35e2c72615e65d520
- https://libvirt.org/git/?p=libvirt.git;a=commit;h=ee247e1d3fbfcf8d2aaff9447b79a65910bcf026
- https://libvirt.org/aclpolkit.html
- https://libvirt.org/git/?p=libvirt.git;a=commit;h=955029bd0ad7ef96000f529ac38204a8f4a96401
- https://libvirt.org/git/?p=libvirt.git;a=commit;h=50864dcda191eb35732dbd80fb6ca251a6bba923
- https://libvirt.org/git/?p=libvirt.git;a=commit;h=e4116eaa44cb366b59f7fe98f4b88d04c04970ad
- https://libvirt.org/git/?p=libvirt.git;a=commit;h=a63b48c5ecef077bf0f909a85f453a605600cf05
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1883864
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1883865
- https://lists.debian.org/debian-lts-announce/2024/04/msg00000.html
- https://launchpad.net/bugs/cve/CVE-2020-25637
- https://security-tracker.debian.org/tracker/CVE-2020-25637
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-25637
- https://nvd.nist.gov/vuln/detail/CVE-2020-25637
- https://ubuntu.com/security/CVE-2020-25637
Parent vulnerabilities
(Appears in the following advisories)
Frequently Asked Questions
What is CVE-2020-25637?
CVE-2020-25637 is a double free memory issue in the libvirt API responsible for requesting information about network interfaces of a running QEMU domain.
How does CVE-2020-25637 affect the polkit access control driver?
CVE-2020-25637 affects the polkit access control driver in the libvirt API.
Which software versions are affected by CVE-2020-25637?
Versions before 6.8.0 of libvirt on Ubuntu and versions before 6.8.0 of libvirt on RedHat are affected.
What is the severity of CVE-2020-25637?
CVE-2020-25637 has a severity rating of medium (6.4).
How can I fix CVE-2020-25637?
To fix CVE-2020-25637, upgrade to version 6.8.0-1 of libvirt on Ubuntu or version 6.8.0 of libvirt on RedHat.
- collector/redhat-cve
- collector/nvd-index
- agent/type
- agent/first-publish-date
- agent/severity
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2020-25637
- agent/software-canonical-lookup
- agent/weakness
- collector/nvd-api
- source/NVD
- agent/author
- collector/nvd-cve
- collector/launchpad-cve
- source/Launchpad
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- collector/usn-cve
- source/Ubuntu
- agent/references
- agent/remedy
- agent/description
- agent/event
- collector/security-tracker-debian
- source/Debian
- agent/softwarecombine
- agent/trending
- agent/tags
- agent/source
- package-manager/redhat
- vendor/redhat
- canonical/redhat libvirt
- vendor/opensuse
- canonical/opensuse leap
- version/opensuse leap/15.1
- version/opensuse leap/15.2
- package-manager/debian