CVE-2023-4004: Kernel: netfilter: use-after-free due to improper element removal in nft_pipapo_remove()
First published: Mon Jul 24 2023(Updated: )
A flaw in the Linux Kernel found. Improper element removal in function nft_pipapo_remove when insert an element without a NFT_SET_EXT_KEY_END that can lead to use-after-free. Reference: <a href="https://patchwork.ozlabs.org/project/netfilter-devel/patch/20230719190824.21196-1-fw@strlen.de/">https://patchwork.ozlabs.org/project/netfilter-devel/patch/20230719190824.21196-1-fw@strlen.de/</a>
Credit: secalert@redhat.com secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | =6.5-rc1 | |
| Linux Linux kernel | <6.5 | |
| Linux Linux kernel | =6.5-rc2 | |
| Linux Linux kernel | =6.5-rc3 | |
| Linux Linux kernel | =6.5-rc4 | |
| Fedoraproject Fedora | =38 | |
| Redhat Enterprise Linux | =8.0 | |
| Redhat Enterprise Linux | =9.0 | |
| IBM Storage Protect Plus vSnap | <=10.1 | |
| Linux Linux kernel | >=5.6<5.10.188 | |
| Linux Linux kernel | >=5.11<5.15.123 | |
| Linux Linux kernel | >=5.16<6.1.42 | |
| Linux Linux kernel | >=6.2<6.4.7 | |
| Netapp H300s | ||
| Netapp H410s | ||
| Netapp H500s | ||
| Netapp H700s | ||
| Debian Debian Linux | =10.0 | |
| Debian Debian Linux | =11.0 | |
| Debian Debian Linux | =12.0 | |
| redhat/kernel | <6.5 | 6.5 |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.115-1 6.1.112-1 6.11.5-1 6.11.7-1 |
Remedy
https://patchwork.ozlabs.org/project/netfilter-devel/patch/20230719190824.21196-1-fw@strlen.de/
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://bugzilla.redhat.com/show_bug.cgi?id=2225275
- https://access.redhat.com/security/cve/CVE-2023-4004
- https://patchwork.ozlabs.org/project/netfilter-devel/patch/20230719190824.21196-1-fw@strlen.de/
- http://packetstormsecurity.com/files/175072/Kernel-Live-Patch-Security-Notice-LSN-0098-1.html
- https://access.redhat.com/errata/RHSA-2023:4961
- https://access.redhat.com/errata/RHSA-2023:4962
- https://access.redhat.com/errata/RHSA-2023:4967
- https://access.redhat.com/errata/RHSA-2023:5069
- https://access.redhat.com/errata/RHSA-2023:5091
- https://access.redhat.com/errata/RHSA-2023:5093
- https://access.redhat.com/errata/RHSA-2023:5221
- https://access.redhat.com/errata/RHSA-2023:5244
- https://access.redhat.com/errata/RHSA-2023:5255
- https://access.redhat.com/errata/RHSA-2023:5548
- https://access.redhat.com/errata/RHSA-2023:5627
- https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html
- https://www.debian.org/security/2023/dsa-5480
- https://www.debian.org/security/2023/dsa-5492
- https://security.netapp.com/advisory/ntap-20231027-0001/
- https://access.redhat.com/errata/RHSA-2023:7382
- https://access.redhat.com/errata/RHSA-2023:7389
- https://access.redhat.com/errata/RHSA-2023:7411
- https://access.redhat.com/errata/RHSA-2023:7417
- https://access.redhat.com/errata/RHSA-2023:7431
- https://access.redhat.com/errata/RHSA-2023:7434
- http://packetstormsecurity.com/files/175963/Kernel-Live-Patch-Security-Notice-LSN-0099-1.html
- https://launchpad.net/bugs/cve/CVE-2023-4004
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2227503
- https://exchange.xforce.ibmcloud.com/vulnerabilities/262209
- https://www.ibm.com/support/pages/node/7096482 (Advisory)
- https://git.kernel.org/linus/87b5a5c209405cb6b57424cdfa226a6dbd349232
- https://security-tracker.debian.org/tracker/CVE-2023-4004
- https://git.kernel.org/linus/87b5a5c209405cb6b57424cdfa226a6dbd349232 (6.5-rc3)
- https://ubuntu.com/security/notices/USN-6315-1
- https://ubuntu.com/security/notices/USN-6316-1
- https://ubuntu.com/security/notices/USN-6318-1
- https://ubuntu.com/security/notices/USN-6321-1
- https://ubuntu.com/security/notices/USN-6325-1
- https://ubuntu.com/security/notices/USN-6328-1
- https://ubuntu.com/security/notices/USN-6330-1
- https://ubuntu.com/security/notices/USN-6332-1
- https://ubuntu.com/security/notices/USN-6348-1
- https://ubuntu.com/security/notices/USN-6385-1
- https://ubuntu.com/security/notices/USN-6442-1
- https://www.cve.org/CVERecord?id=CVE-2023-4004
- https://nvd.nist.gov/vuln/detail/CVE-2023-4004
- https://git.kernel.org/linus/3c4287f62044a90e73a561aa05fc46e62da173da
- https://ubuntu.com/security/CVE-2023-4004
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