CVE-2022-1055: Use after Free in tc_new_tfilter allowing for privilege escalation in Linux Kernel
First published: Mon Jan 31 2022(Updated: )
A use-after-free exists in the Linux Kernel in tc_new_tfilter that could allow a local attacker to gain privilege escalation. The exploit requires unprivileged user namespaces. We recommend upgrading past commit 04c2a47ffb13c29778e2a14e414ad4cb5a5db4b5
Credit: cve-coordination@google.com cve-coordination@google.com cve-coordination@google.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel-rt | <0:4.18.0-425.3.1.rt7.213.el8 | 0:4.18.0-425.3.1.rt7.213.el8 |
| redhat/kernel | <0:4.18.0-425.3.1.el8 | 0:4.18.0-425.3.1.el8 |
| redhat/kernel | <0:5.14.0-70.22.1.el9_0 | 0:5.14.0-70.22.1.el9_0 |
| redhat/kernel-rt | <0:5.14.0-70.22.1.rt21.94.el9_0 | 0:5.14.0-70.22.1.rt21.94.el9_0 |
| redhat/kernel | <5.17 | 5.17 |
| Linux Linux kernel | >=5.1<5.17 | |
| Linux Linux kernel | =5.17 | |
| Linux Linux kernel | =5.17-rc1 | |
| Linux Linux kernel | =5.17-rc2 | |
| Red Hat Enterprise Linux | =8.0 | |
| Fedoraproject Fedora | =35 | |
| Canonical Ubuntu Linux | =16.04 | |
| Canonical Ubuntu Linux | =18.04 | |
| Canonical Ubuntu Linux | =20.04 | |
| Canonical Ubuntu Linux | =21.10 | |
| Canonical Ubuntu Linux | =22.04 | |
| All of | ||
| Netapp H300s Firmware | ||
| Netapp H300s | ||
| All of | ||
| Netapp H500s Firmware | ||
| Netapp H500s | ||
| All of | ||
| Netapp H700s Firmware | ||
| Netapp H700s | ||
| All of | ||
| Netapp H300e Firmware | ||
| Netapp H300e | ||
| All of | ||
| Netapp H500e Firmware | ||
| Netapp H500e | ||
| All of | ||
| Netapp H700e Firmware | ||
| Netapp H700e | ||
| All of | ||
| Netapp H410s Firmware | ||
| Netapp H410s | ||
| All of | ||
| Netapp H410c Firmware | ||
| Netapp H410c | ||
| Netapp H300s Firmware | ||
| Netapp H300s | ||
| Netapp H500s Firmware | ||
| Netapp H500s | ||
| Netapp H700s Firmware | ||
| Netapp H700s | ||
| Netapp H300e Firmware | ||
| Netapp H300e | ||
| Netapp H500e Firmware | ||
| Netapp H500e | ||
| Netapp H700e Firmware | ||
| Netapp H700e | ||
| Netapp H410s Firmware | ||
| Netapp H410s | ||
| Netapp H410c Firmware | ||
| Netapp H410c | ||
| debian/linux | 5.10.223-1 5.10.226-1 6.1.123-1 6.1.119-1 6.12.9-1 6.12.10-1 |
Remedy
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-2022-1055 https://nvd.nist.gov/vuln/detail/CVE-2022-1055 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=04c2a47ffb13c29778e2a14e414ad4cb5a5db4b5 https://syzkaller.appspot.com/bug?id=2212474c958978ab86525fe6832ac8102c309ffc
- https://bugzilla.redhat.com/show_bug.cgi?id=2070220
- https://access.redhat.com/errata/RHSA-2022:7444
- https://access.redhat.com/errata/RHSA-2022:7683
- https://access.redhat.com/errata/RHSA-2022:6003
- https://access.redhat.com/errata/RHSA-2022:6002
- https://access.redhat.com/security/cve/cve-2022-1055
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=04c2a47ffb13c29778e2a14e414ad4cb5a5db4b5
- https://kernel.dance/#04c2a47ffb13c29778e2a14e414ad4cb5a5db4b5
- https://syzkaller.appspot.com/bug?id=2212474c958978ab86525fe6832ac8102c309ffc
- https://security.netapp.com/advisory/ntap-20220506-0007/
- http://packetstormsecurity.com/files/167386/Kernel-Live-Patch-Security-Notice-LSN-0086-1.html
- https://launchpad.net/bugs/cve/CVE-2022-1055
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2070221
- https://access.redhat.com/errata/RHSA-2024:1188
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-1055
- https://nvd.nist.gov/vuln/detail/CVE-2022-1055
- https://security-tracker.debian.org/tracker/CVE-2022-1055
- https://ubuntu.com/security/CVE-2022-1055
- https://git.kernel.org/linus/04c2a47ffb13c29778e2a14e414ad4cb5a5db4b5
Parent vulnerabilities
(Appears in the following advisories)
- collector/redhat-cve
- agent/type
- agent/first-publish-date
- collector/launchpad-cve
- source/Launchpad
- agent/weakness
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2022-1055
- agent/software-canonical-lookup
- agent/title
- agent/author
- agent/severity
- collector/mitre-cve
- source/MITRE
- collector/usn-cve
- source/Ubuntu
- agent/last-modified-date
- agent/references
- agent/remedy
- agent/description
- agent/event
- agent/trending
- collector/security-tracker-debian
- source/Debian
- collector/nvd-cve
- source/NVD
- agent/software-canonical-lookup-request
- collector/nvd-index
- collector/nvd-api
- agent/softwarecombine
- agent/tags
- agent/source
- package-manager/redhat
- package-manager/debian
- vendor/linux
- canonical/linux linux kernel
- version/linux linux kernel/5.1
- version/linux linux kernel/5.17
- version/linux linux kernel/5.17-rc1
- version/linux linux kernel/5.17-rc2
- vendor/redhat
- canonical/red hat enterprise linux
- version/red hat enterprise linux/8.0
- vendor/fedoraproject
- canonical/fedoraproject fedora
- version/fedoraproject fedora/35
- vendor/canonical
- canonical/canonical ubuntu linux
- version/canonical ubuntu linux/16.04
- version/canonical ubuntu linux/18.04
- version/canonical ubuntu linux/20.04
- version/canonical ubuntu linux/21.10
- version/canonical ubuntu linux/22.04
- 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 h300e firmware
- canonical/netapp h300e
- canonical/netapp h500e firmware
- canonical/netapp h500e
- canonical/netapp h700e firmware
- canonical/netapp h700e
- canonical/netapp h410s firmware
- canonical/netapp h410s
- canonical/netapp h410c firmware
- canonical/netapp h410c