CVE-2022-0185: Linux Kernel Heap-Based Buffer Overflow Vulnerability
First published: Thu Jan 13 2022(Updated: )
A heap-based buffer overflow flaw was found in the way the legacy_parse_param function in the Filesystem Context functionality of the Linux kernel verified the supplied parameters length. An unprivileged (in case of unprivileged user namespaces enabled, otherwise needs namespaced CAP_SYS_ADMIN privilege) local user able to open a filesystem that does not support the Filesystem Context API (and thus fallbacks to legacy handling) could use this flaw to escalate their privileges on the system.
Credit: secalert@redhat.com secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel-rt | <0:4.18.0-348.12.2.rt7.143.el8_5 | 0:4.18.0-348.12.2.rt7.143.el8_5 |
| redhat/kernel | <0:4.18.0-348.12.2.el8_5 | 0:4.18.0-348.12.2.el8_5 |
| redhat/kernel-rt | <0:4.18.0-305.34.2.rt7.107.el8_4 | 0:4.18.0-305.34.2.rt7.107.el8_4 |
| redhat/kernel | <0:4.18.0-305.34.2.el8_4 | 0:4.18.0-305.34.2.el8_4 |
| Linux Linux kernel | >=5.1<5.4.173 | |
| Linux Linux kernel | >=5.5<5.10.93 | |
| Linux Linux kernel | >=5.11<5.15.16 | |
| Linux Linux kernel | >=5.16<5.16.2 | |
| 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 | ||
| IBM Planning Analytics Cartridge for IBM Cloud Pak for Data | <=4.0 | |
| All of | ||
| Netapp H410c Firmware | ||
| Netapp H410c | ||
| 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 | ||
| Linux kernel | ||
| debian/linux | 5.10.223-1 6.1.106-3 6.1.99-1 6.10.9-1 |
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.
Remedy
Apply updates per vendor instructions or discontinue use of the product if updates are unavailable.
Remedy
Disable unprivileged user namespaces: sysctl -w kernel.unprivileged_userns_clone=0
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Reference Links
- https://www.cve.org/CVERecord?id=CVE-2022-0185 https://nvd.nist.gov/vuln/detail/CVE-2022-0185 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=722d94847de2 https://github.com/Crusaders-of-Rust/CVE-2022-0185 https://www.openwall.com/lists/oss-security/2022/01/18/7 https://www.willsroot.io/2022/01/cve-2022-0185.html
- https://bugzilla.redhat.com/show_bug.cgi?id=2040358
- https://access.redhat.com/errata/RHSA-2022:0176
- https://access.redhat.com/errata/RHSA-2022:0188
- https://access.redhat.com/errata/RHSA-2022:0232
- https://access.redhat.com/errata/RHSA-2022:0187
- https://access.redhat.com/errata/RHSA-2022:0186
- https://access.redhat.com/errata/RHSA-2022:0231
- https://access.redhat.com/errata/RHSA-2022:0540
- https://access.redhat.com/security/cve/cve-2022-0185
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=722d94847de2
- https://github.com/Crusaders-of-Rust/CVE-2022-0185
- https://www.openwall.com/lists/oss-security/2022/01/18/7
- https://www.willsroot.io/2022/01/cve-2022-0185.html
- https://security.netapp.com/advisory/ntap-20220225-0003/
- https://launchpad.net/bugs/cve/CVE-2022-0185
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2042052
- https://www.theregister.com/2024/03/22/china_f5_connectwise_unc5174/
- https://exchange.xforce.ibmcloud.com/vulnerabilities/217455
- https://www.ibm.com/support/pages/node/6999351 (Advisory)
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=722d94847de2;
- https://nvd.nist.gov/vuln/detail/CVE-2022-0185
- https://git.kernel.org/linus/722d94847de29310e8aa03fcbdb41fc92c521756
- https://www.openwall.com/lists/oss-security/2022/01/25/14
- https://security-tracker.debian.org/tracker/CVE-2022-0185
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-0185
- https://ubuntu.com/security/CVE-2022-0185
Parent vulnerabilities
(Appears in the following advisories)
Peer vulnerabilities
(Found alongside the following vulnerabilities)
- collector/redhat-cve
- agent/type
- agent/first-publish-date
- collector/launchpad-cve
- source/Launchpad
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2022-0185
- collector/the-register
- source/The Register
- alias/CVE-2023-46747
- alias/CVE-2024-1709
- alias/CVE-2023-22518
- alias/CVE-2022-3052
- agent/news-ai
- collector/nvd-index
- agent/software-canonical-lookup-request
- agent/severity
- agent/weakness
- collector/ibm-support
- source/IBM
- agent/software-canonical-lookup
- agent/remedy
- agent/description
- agent/event
- agent/author
- collector/mitre-cve
- source/MITRE
- collector/nvd-api
- source/NVD
- agent/last-modified-date
- collector/nvd-cve
- agent/title
- exploited/true
- collector/cisa-known-exploited
- source/CISA
- agent/references
- agent/tags
- collector/security-tracker-debian
- source/Debian
- agent/softwarecombine
- collector/usn-cve
- source/Ubuntu
- package-manager/redhat
- vendor/linux
- canonical/linux linux kernel
- version/linux linux kernel/5.1
- version/linux linux kernel/5.5
- version/linux linux kernel/5.11
- version/linux linux kernel/5.16
- vendor/netapp
- canonical/netapp h410c firmware
- canonical/netapp h410c
- 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
- vendor/ibm
- canonical/ibm planning analytics cartridge for ibm cloud pak for data
- version/ibm planning analytics cartridge for ibm cloud pak for data/4.0
- canonical/linux kernel
- package-manager/debian