high
7.8
CWE
416
Advisory Published
CVE Published
Updated

CVE-2023-32233: [CVE-2023-32233] Linux kernel use-after-free in Netfilter nf_tables when processing batch requests can be abused to perform arbitrary reads and writes in kernel memory

First published: Mon May 08 2023(Updated: )

In the Linux kernel through 6.3.1, a use-after-free in Netfilter nf_tables when processing batch requests can be abused to perform arbitrary read and write operations on kernel memory. Unprivileged local users can obtain root privileges. This occurs because anonymous sets are mishandled.

Credit: cve@mitre.org cve@mitre.org cve@mitre.org

Affected SoftwareAffected VersionHow to fix
Linux Linux kernel>=3.13<4.14.315
Linux Linux kernel>=4.15<4.19.283
Linux Linux kernel>=4.20<5.4.243
Linux Linux kernel>=5.5<5.10.180
Linux Linux kernel>=5.11<5.15.111
Linux Linux kernel>=5.16<6.1.28
Linux Linux kernel>=6.2<6.2.15
Linux Linux kernel>=6.3<6.3.2
Redhat Enterprise Linux=7.0
Redhat Enterprise Linux=8.0
Redhat Enterprise Linux=9.0
Netapp Hci Baseboard Management Controller=h300s
Netapp Hci Baseboard Management Controller=h410c
Netapp Hci Baseboard Management Controller=h410s
Netapp Hci Baseboard Management Controller=h500s
Netapp Hci Baseboard Management Controller=h700s
IBM QRadar Network Packet Capture<=7.5.0 - 7.5.0 Update Package 7
redhat/kernel<6.4
6.4
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

http://packetstormsecurity.com/files/173087/Kernel-Live-Patch-Security-Notice-LSN-0095-1.html

Remedy

https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c1592a89942e9678f7d9c8030efa777c0d57edab

Remedy

https://github.com/torvalds/linux/commit/c1592a89942e9678f7d9c8030efa777c0d57edab

Remedy

https://www.openwall.com/lists/oss-security/2023/05/08/4

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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