CVE-2022-32250: Use After Free
First published: Tue May 31 2022(Updated: )
net/netfilter/nf_tables_api.c in the Linux kernel through 5.18.1 allows a local user (able to create user/net namespaces) to escalate privileges to root because an incorrect NFT_STATEFUL_EXPR check leads to a use-after-free.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel-rt | <0:3.10.0-1160.71.1.rt56.1212.el7 | 0:3.10.0-1160.71.1.rt56.1212.el7 |
| redhat/kernel | <0:3.10.0-1160.71.1.el7 | 0:3.10.0-1160.71.1.el7 |
| redhat/kernel | <0:3.10.0-514.104.1.el7 | 0:3.10.0-514.104.1.el7 |
| redhat/kernel | <0:3.10.0-693.104.1.el7 | 0:3.10.0-693.104.1.el7 |
| redhat/kernel | <0:3.10.0-957.95.1.el7 | 0:3.10.0-957.95.1.el7 |
| redhat/kernel | <0:3.10.0-1062.68.1.el7 | 0:3.10.0-1062.68.1.el7 |
| redhat/kernel-rt | <0:4.18.0-372.19.1.rt7.176.el8_6 | 0:4.18.0-372.19.1.rt7.176.el8_6 |
| redhat/kernel | <0:4.18.0-372.19.1.el8_6 | 0:4.18.0-372.19.1.el8_6 |
| redhat/kernel | <0:4.18.0-147.70.1.el8_1 | 0:4.18.0-147.70.1.el8_1 |
| redhat/kernel-rt | <0:4.18.0-193.87.1.rt13.137.el8_2 | 0:4.18.0-193.87.1.rt13.137.el8_2 |
| redhat/kernel | <0:4.18.0-193.87.1.el8_2 | 0:4.18.0-193.87.1.el8_2 |
| redhat/kernel-rt | <0:4.18.0-305.57.1.rt7.129.el8_4 | 0:4.18.0-305.57.1.rt7.129.el8_4 |
| redhat/kernel | <0:4.18.0-305.57.1.el8_4 | 0:4.18.0-305.57.1.el8_4 |
| redhat/kernel | <0:5.14.0-70.17.1.el9_0 | 0:5.14.0-70.17.1.el9_0 |
| redhat/kernel-rt | <0:5.14.0-70.17.1.rt21.89.el9_0 | 0:5.14.0-70.17.1.rt21.89.el9_0 |
| redhat/redhat-virtualization-host | <0:4.3.23-20220622.0.el7_9 | 0:4.3.23-20220622.0.el7_9 |
| debian/linux | 4.19.249-2 4.19.289-2 5.10.197-1 5.10.205-2 6.1.66-1 6.1.69-1 6.5.13-1 6.6.9-1 | |
| redhat/kernel | <5.19 | 5.19 |
| Linux Linux kernel | >=4.1<4.9.318 | |
| Linux Linux kernel | >=4.10<4.14.283 | |
| Linux Linux kernel | >=4.15<4.19.247 | |
| Linux Linux kernel | >=4.20<5.4.198 | |
| Linux Linux kernel | >=5.5<5.10.120 | |
| Linux Linux kernel | >=5.11<5.15.45 | |
| Linux Linux kernel | >=5.16<5.17.13 | |
| Linux Linux kernel | >=5.18<5.18.2 | |
| Fedoraproject Fedora | =35 | |
| Fedoraproject Fedora | =36 | |
| Debian Debian Linux | =9.0 | |
| Debian Debian Linux | =10.0 | |
| Netapp H300s Firmware | ||
| Netapp H300s | ||
| Netapp H500s Firmware | ||
| Netapp H500s | ||
| Netapp H700s Firmware | ||
| Netapp H700s | ||
| Netapp H410s Firmware | ||
| Netapp H410s | ||
| Netapp H410c Firmware | ||
| Netapp H410c |
Remedy
In order to trigger the issue, it requires the ability to create user/net namespaces. On non-containerized deployments of Red Hat Enterprise Linux 8, you can disable user namespaces by setting user.max_user_namespaces to 0: # echo "user.max_user_namespaces=0" > /etc/sysctl.d/userns.conf # sysctl -p /etc/sysctl.d/userns.conf On containerized deployments, such as Red Hat OpenShift Container Platform, do not use this mitigation as the functionality is needed to be enabled.
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Reference Links
- https://www.cve.org/CVERecord?id=CVE-2022-32250 https://nvd.nist.gov/vuln/detail/CVE-2022-32250 https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/net/netfilter?id=520778042ccca019f3ffa136dd0ca565c486cedd https://www.openwall.com/lists/oss-security/2022/05/31/1
- https://bugzilla.redhat.com/show_bug.cgi?id=2092427
- https://access.redhat.com/errata/RHSA-2022:5236
- https://access.redhat.com/errata/RHSA-2022:5216
- https://access.redhat.com/errata/RHSA-2022:5232
- https://access.redhat.com/errata/RHSA-2022:5806
- https://access.redhat.com/errata/RHSA-2022:5805
- https://access.redhat.com/errata/RHSA-2022:5802
- https://access.redhat.com/errata/RHSA-2022:5804
- https://access.redhat.com/errata/RHSA-2022:6073
- https://access.redhat.com/errata/RHSA-2022:6075
- https://access.redhat.com/errata/RHSA-2022:5834
- https://access.redhat.com/errata/RHSA-2022:5819
- https://access.redhat.com/errata/RHSA-2022:5839
- https://access.redhat.com/errata/RHSA-2022:5636
- https://access.redhat.com/errata/RHSA-2022:5648
- https://access.redhat.com/errata/RHSA-2022:5224
- https://access.redhat.com/errata/RHSA-2022:5220
- https://access.redhat.com/errata/RHSA-2022:5476
- https://access.redhat.com/errata/RHSA-2022:5633
- https://access.redhat.com/errata/RHSA-2022:5626
- https://access.redhat.com/errata/RHSA-2022:5641
- https://access.redhat.com/errata/RHSA-2022:5249
- https://access.redhat.com/errata/RHSA-2022:5267
- https://access.redhat.com/errata/RHSA-2022:5214
- https://access.redhat.com/errata/RHSA-2022:5439
- https://access.redhat.com/errata/RHSA-2022:6551
- https://access.redhat.com/security/cve/cve-2022-32250
- https://www.openwall.com/lists/oss-security/2022/05/31/1
- https://git.kernel.org/linus/520778042ccca019f3ffa136dd0ca565c486cedd
- https://github.com/theori-io/CVE-2022-32250-exploit
- https://research.nccgroup.com/2022/09/01/settlers-of-netlink-exploiting-a-limited-uaf-in-nf_tables-cve-2022-32250/
- https://blog.theori.io/research/CVE-2022-32250-linux-kernel-lpe-2022/
- https://security-tracker.debian.org/tracker/CVE-2022-32250
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2092531
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2093146
- http://www.openwall.com/lists/oss-security/2022/06/03/1
- http://www.openwall.com/lists/oss-security/2022/06/04/1
- http://www.openwall.com/lists/oss-security/2022/06/20/1
- http://www.openwall.com/lists/oss-security/2022/07/03/5
- http://www.openwall.com/lists/oss-security/2022/07/03/6
- http://www.openwall.com/lists/oss-security/2022/08/25/1
- http://www.openwall.com/lists/oss-security/2022/09/02/9
- https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/net/netfilter?id=520778042ccca019f3ffa136dd0ca565c486cedd
- https://lists.debian.org/debian-lts-announce/2022/07/msg00000.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MO6Y3TC4WUUNKRP7OQA26OVTZTPCS6F2/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UIZTJOJCVVEJVOQSCHE6IJQKMPISHQ5L/
- https://security.netapp.com/advisory/ntap-20220715-0005/
- https://www.debian.org/security/2022/dsa-5161
- https://www.debian.org/security/2022/dsa-5173
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MO6Y3TC4WUUNKRP7OQA26OVTZTPCS6F2/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UIZTJOJCVVEJVOQSCHE6IJQKMPISHQ5L/
Parent vulnerabilities
(Appears in the following advisories)
- RHSA-2022:5236
- RHSA-2022:5216
- RHSA-2022:5232
- RHSA-2022:5806
- RHSA-2022:5805
- RHSA-2022:5802
- RHSA-2022:5804
- RHSA-2022:6073
- RHSA-2022:6075
- RHSA-2022:5834
- RHSA-2022:5819
- RHSA-2022:5839
- RHSA-2022:5636
- RHSA-2022:5648
- RHSA-2022:5224
- RHSA-2022:5220
- RHSA-2022:5476
- RHSA-2022:5633
- RHSA-2022:5626
- RHSA-2022:5641
- RHSA-2022:5249
- RHSA-2022:5267
- RHSA-2022:5214
- RHSA-2022:5439
- RHSA-2022:6551
- collector/redhat-cve
- collector/security-tracker-debian
- agent/type
- agent/last-modified-date
- agent/first-publish-date
- agent/weakness
- agent/remedy
- agent/references
- agent/author
- agent/severity
- agent/description
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2022-32250
- agent/software-canonical-lookup
- agent/event
- collector/nvd-index
- agent/software-canonical-lookup-request
- agent/softwarecombine
- agent/tags
- collector/mitre-cve
- source/MITRE
- package-manager/redhat
- package-manager/debian
- vendor/linux
- canonical/linux linux kernel
- version/linux linux kernel/4.1
- version/linux linux kernel/4.10
- version/linux linux kernel/4.15
- version/linux linux kernel/4.20
- version/linux linux kernel/5.5
- version/linux linux kernel/5.11
- version/linux linux kernel/5.16
- version/linux linux kernel/5.18
- vendor/fedoraproject
- canonical/fedoraproject fedora
- version/fedoraproject fedora/35
- version/fedoraproject fedora/36
- vendor/debian
- canonical/debian debian linux
- version/debian debian linux/9.0
- version/debian debian linux/10.0
- vendor/netapp
- canonical/netapp h300s firmware
- canonical/netapp h300s
- canonical/netapp h500s firmware
- canonical/netapp h500s
- canonical/netapp h700s firmware
- canonical/netapp h700s
- canonical/netapp h410s firmware
- canonical/netapp h410s
- canonical/netapp h410c firmware
- canonical/netapp h410c