CVE-2023-6932: Fixes in Linux Kernel
First published: Tue Dec 19 2023(Updated: )
A use-after-free vulnerability in the Linux kernel's ipv4: igmp component can be exploited to achieve local privilege escalation. A race condition can be exploited to cause a timer be mistakenly registered on a RCU read locked object which is freed by another thread. We recommend upgrading past commit e2b706c691905fe78468c361aaabc719d0a496f1.
Credit: cve-coordination@google.com cve-coordination@google.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | >=2.6.12<6.7 | |
| IBM QRadar SIEM | <=7.5 - 7.5.0 UP8 IF01 | |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.115-1 6.1.119-1 6.11.10-1 6.12.5-1 |
Remedy
If not needed, disable the ability for unprivileged users to create namespaces. To do this temporarily, do: sudo sysctl -w kernel.unprivileged_userns_clone=0 To disable across reboots, do: echo kernel.unprivileged_userns_clone=0 | \ sudo tee /etc/sysctl.d/99-disable-unpriv-userns.conf
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Reference Links
- https://chromereleases.googleblog.com/2024/02/stable-channel-update-for-chromeos.html (Advisory)
- http://packetstormsecurity.com/files/177029/Kernel-Live-Patch-Security-Notice-LSN-0100-1.html
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=e2b706c691905fe78468c361aaabc719d0a496f1
- https://kernel.dance/e2b706c691905fe78468c361aaabc719d0a496f1
- https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html
- https://lists.debian.org/debian-lts-announce/2024/01/msg00005.html
- https://launchpad.net/bugs/cve/CVE-2023-6932
- https://exchange.xforce.ibmcloud.com/vulnerabilities/275569
- https://www.ibm.com/support/pages/node/7150684 (Advisory)
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2255288
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2258584
- https://access.redhat.com/errata/RHSA-2024:0725
- https://access.redhat.com/errata/RHSA-2024:0723
- https://access.redhat.com/errata/RHSA-2024:0724
- https://access.redhat.com/errata/RHSA-2024:1250
- https://access.redhat.com/errata/RHSA-2024:1306
- https://access.redhat.com/errata/RHSA-2024:1404
- https://access.redhat.com/errata/RHSA-2024:2394
- https://access.redhat.com/errata/RHSA-2024:2950
- https://access.redhat.com/errata/RHSA-2024:3138
- https://bugzilla.redhat.com/show_bug.cgi?id=2255283
- https://git.kernel.org/linus/e2b706c691905fe78468c361aaabc719d0a496f1
- https://security-tracker.debian.org/tracker/CVE-2023-6932
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-6932
- https://nvd.nist.gov/vuln/detail/CVE-2023-6932
- https://ubuntu.com/security/CVE-2023-6932
Peer vulnerabilities
(Found alongside the following vulnerabilities)
- agent/type
- agent/first-publish-date
- agent/author
- collector/epss-latest
- source/FIRST
- agent/epss
- collector/chrome-releases
- agent/title
- collector/nvd-api
- source/NVD
- agent/software-canonical-lookup
- agent/weakness
- collector/launchpad-cve
- source/Launchpad
- agent/severity
- collector/ibm-support
- source/IBM
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2023-6932
- collector/mitre-cve
- source/MITRE
- agent/remedy
- agent/references
- agent/tags
- collector/usn-cve
- source/Ubuntu
- agent/description
- agent/event
- collector/nvd-cve
- agent/last-modified-date
- collector/security-tracker-debian
- source/Debian
- agent/softwarecombine
- agent/trending
- vendor/linux
- canonical/linux linux kernel
- version/linux linux kernel/2.6.12
- vendor/ibm
- canonical/ibm qradar siem
- version/ibm qradar siem/7.5 - 7.5.0 up8 if01
- package-manager/debian