RHSA-2024_3528
Vulnerability from csaf_redhat - Published: 2024-05-31 15:51 - Updated: 2024-12-12 09:54Summary
Red Hat Security Advisory: kernel security update
Severity
Important
Notes
Topic: An update for kernel is now available for Red Hat Enterprise Linux 8.2 Advanced Update Support.
Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details: The kernel packages contain the Linux kernel, the core of any Linux operating system.
Security Fix(es):
* kernel: NULL pointer dereference in can_rcv_filter (CVE-2023-2166)
* kernel: Slab-out-of-bound read in compare_netdev_and_ip (CVE-2023-2176)
* kernel: nf_tables: use-after-free vulnerability in the nft_verdict_init() function (CVE-2024-1086)
* kernel: net: bridge: data races indata-races in br_handle_frame_finish() (CVE-2023-52578)
Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
A NULL pointer dereference issue was found in the can protocol in net/can/af_can.c in the Linux kernel, where ml_priv may not be initialized in the receive path of CAN frames. This flaw allows a local user to crash the system or cause a denial of service.
5.5 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
The system must be rebooted for this update to take effect.
https://access.redhat.com/errata/RHSA-2024:3528
A vulnerability was found in compare_netdev_and_ip in drivers/infiniband/core/cma.c in RDMA in the Linux kernel. An improper cleanup results in an out-of-boundary read. This flaw allows a local user to crash or escalate privileges on the system.
7.8 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
The system must be rebooted for this update to take effect.
https://access.redhat.com/errata/RHSA-2024:3528
Workaround
Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
In the Linux kernel, the following vulnerability has been resolved: net: bridge: use DEV_STATS_INC() syzbot/KCSAN reported data-races in br_handle_frame_finish() [1] This function can run from multiple cpus without mutual exclusion. Adopt SMP safe DEV_STATS_INC() to update dev->stats fields. Handles updates to dev->stats.tx_dropped while we are at it. [1] BUG: KCSAN: data-race in br_handle_frame_finish / br_handle_frame_finish read-write to 0xffff8881374b2178 of 8 bytes by interrupt on cpu 1: br_handle_frame_finish+0xd4f/0xef0 net/bridge/br_input.c:189 br_nf_hook_thresh+0x1ed/0x220 br_nf_pre_routing_finish_ipv6+0x50f/0x540 NF_HOOK include/linux/netfilter.h:304 [inline] br_nf_pre_routing_ipv6+0x1e3/0x2a0 net/bridge/br_netfilter_ipv6.c:178 br_nf_pre_routing+0x526/0xba0 net/bridge/br_netfilter_hooks.c:508 nf_hook_entry_hookfn include/linux/netfilter.h:144 [inline] nf_hook_bridge_pre net/bridge/br_input.c:272 [inline] br_handle_frame+0x4c9/0x940 net/bridge/br_input.c:417 __netif_receive_skb_core+0xa8a/0x21e0 net/core/dev.c:5417 __netif_receive_skb_one_core net/core/dev.c:5521 [inline] __netif_receive_skb+0x57/0x1b0 net/core/dev.c:5637 process_backlog+0x21f/0x380 net/core/dev.c:5965 __napi_poll+0x60/0x3b0 net/core/dev.c:6527 napi_poll net/core/dev.c:6594 [inline] net_rx_action+0x32b/0x750 net/core/dev.c:6727 __do_softirq+0xc1/0x265 kernel/softirq.c:553 run_ksoftirqd+0x17/0x20 kernel/softirq.c:921 smpboot_thread_fn+0x30a/0x4a0 kernel/smpboot.c:164 kthread+0x1d7/0x210 kernel/kthread.c:388 ret_from_fork+0x48/0x60 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 read-write to 0xffff8881374b2178 of 8 bytes by interrupt on cpu 0: br_handle_frame_finish+0xd4f/0xef0 net/bridge/br_input.c:189 br_nf_hook_thresh+0x1ed/0x220 br_nf_pre_routing_finish_ipv6+0x50f/0x540 NF_HOOK include/linux/netfilter.h:304 [inline] br_nf_pre_routing_ipv6+0x1e3/0x2a0 net/bridge/br_netfilter_ipv6.c:178 br_nf_pre_routing+0x526/0xba0 net/bridge/br_netfilter_hooks.c:508 nf_hook_entry_hookfn include/linux/netfilter.h:144 [inline] nf_hook_bridge_pre net/bridge/br_input.c:272 [inline] br_handle_frame+0x4c9/0x940 net/bridge/br_input.c:417 __netif_receive_skb_core+0xa8a/0x21e0 net/core/dev.c:5417 __netif_receive_skb_one_core net/core/dev.c:5521 [inline] __netif_receive_skb+0x57/0x1b0 net/core/dev.c:5637 process_backlog+0x21f/0x380 net/core/dev.c:5965 __napi_poll+0x60/0x3b0 net/core/dev.c:6527 napi_poll net/core/dev.c:6594 [inline] net_rx_action+0x32b/0x750 net/core/dev.c:6727 __do_softirq+0xc1/0x265 kernel/softirq.c:553 do_softirq+0x5e/0x90 kernel/softirq.c:454 __local_bh_enable_ip+0x64/0x70 kernel/softirq.c:381 __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:167 [inline] _raw_spin_unlock_bh+0x36/0x40 kernel/locking/spinlock.c:210 spin_unlock_bh include/linux/spinlock.h:396 [inline] batadv_tt_local_purge+0x1a8/0x1f0 net/batman-adv/translation-table.c:1356 batadv_tt_purge+0x2b/0x630 net/batman-adv/translation-table.c:3560 process_one_work kernel/workqueue.c:2630 [inline] process_scheduled_works+0x5b8/0xa30 kernel/workqueue.c:2703 worker_thread+0x525/0x730 kernel/workqueue.c:2784 kthread+0x1d7/0x210 kernel/kthread.c:388 ret_from_fork+0x48/0x60 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 value changed: 0x00000000000d7190 -> 0x00000000000d7191 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 14848 Comm: kworker/u4:11 Not tainted 6.6.0-rc1-syzkaller-00236-gad8a69f361b9 #0
4.7 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
The system must be rebooted for this update to take effect.
https://access.redhat.com/errata/RHSA-2024:3528
A flaw was found in the Netfilter subsystem in the Linux kernel. This issue occurs in the nft_verdict_init() function, allowing positive values as a drop error within the hook verdict, therefore, the nf_hook_slow() function can cause a double-free vulnerability when NF_DROP is issued with a drop error that resembles NF_ACCEPT. The nf_tables component can be exploited to achieve local privilege escalation.
7.8 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
The system must be rebooted for this update to take effect.
https://access.redhat.com/errata/RHSA-2024:3528
Workaround
1. This flaw can be mitigated by preventing the affected netfilter (nf_tables) kernel module from being loaded. For instructions on how to blacklist a kernel module, please see https://access.redhat.com/solutions/41278.
2. If the module cannot be disabled, on non-containerized deployments of Red Hat Enterprise Linux, the mitigation is to disable user namespaces:
```
# 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 the second mitigation (disabling user namespaces) as the functionality is needed to be enabled. The first mitigation (blacklisting nf_tables) is still viable for containerized deployments, providing the environment is not using netfilter.
References
Acknowledgments
Wei Chen
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"category": "description",
"text": "A NULL pointer dereference issue was found in the can protocol in net/can/af_can.c in the Linux kernel, where ml_priv may not be initialized in the receive path of CAN frames. This flaw allows a local user to crash the system or cause a denial of service.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: NULL pointer dereference in can_rcv_filter",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
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}
],
"title": "kernel: Slab-out-of-bound read in compare_netdev_and_ip"
},
{
"cve": "CVE-2023-52578",
"cwe": {
"id": "CWE-362",
"name": "Concurrent Execution using Shared Resource with Improper Synchronization (\u0027Race Condition\u0027)"
},
"discovery_date": "2024-03-02T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2267758"
}
],
"notes": [
{
"category": "description",
"text": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: bridge: use DEV_STATS_INC()\n\nsyzbot/KCSAN reported data-races in br_handle_frame_finish() [1]\nThis function can run from multiple cpus without mutual exclusion.\n\nAdopt SMP safe DEV_STATS_INC() to update dev-\u003estats fields.\n\nHandles updates to dev-\u003estats.tx_dropped while we are at it.\n\n[1]\nBUG: KCSAN: data-race in br_handle_frame_finish / br_handle_frame_finish\n\nread-write to 0xffff8881374b2178 of 8 bytes by interrupt on cpu 1:\nbr_handle_frame_finish+0xd4f/0xef0 net/bridge/br_input.c:189\nbr_nf_hook_thresh+0x1ed/0x220\nbr_nf_pre_routing_finish_ipv6+0x50f/0x540\nNF_HOOK include/linux/netfilter.h:304 [inline]\nbr_nf_pre_routing_ipv6+0x1e3/0x2a0 net/bridge/br_netfilter_ipv6.c:178\nbr_nf_pre_routing+0x526/0xba0 net/bridge/br_netfilter_hooks.c:508\nnf_hook_entry_hookfn include/linux/netfilter.h:144 [inline]\nnf_hook_bridge_pre net/bridge/br_input.c:272 [inline]\nbr_handle_frame+0x4c9/0x940 net/bridge/br_input.c:417\n__netif_receive_skb_core+0xa8a/0x21e0 net/core/dev.c:5417\n__netif_receive_skb_one_core net/core/dev.c:5521 [inline]\n__netif_receive_skb+0x57/0x1b0 net/core/dev.c:5637\nprocess_backlog+0x21f/0x380 net/core/dev.c:5965\n__napi_poll+0x60/0x3b0 net/core/dev.c:6527\nnapi_poll net/core/dev.c:6594 [inline]\nnet_rx_action+0x32b/0x750 net/core/dev.c:6727\n__do_softirq+0xc1/0x265 kernel/softirq.c:553\nrun_ksoftirqd+0x17/0x20 kernel/softirq.c:921\nsmpboot_thread_fn+0x30a/0x4a0 kernel/smpboot.c:164\nkthread+0x1d7/0x210 kernel/kthread.c:388\nret_from_fork+0x48/0x60 arch/x86/kernel/process.c:147\nret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304\n\nread-write to 0xffff8881374b2178 of 8 bytes by interrupt on cpu 0:\nbr_handle_frame_finish+0xd4f/0xef0 net/bridge/br_input.c:189\nbr_nf_hook_thresh+0x1ed/0x220\nbr_nf_pre_routing_finish_ipv6+0x50f/0x540\nNF_HOOK include/linux/netfilter.h:304 [inline]\nbr_nf_pre_routing_ipv6+0x1e3/0x2a0 net/bridge/br_netfilter_ipv6.c:178\nbr_nf_pre_routing+0x526/0xba0 net/bridge/br_netfilter_hooks.c:508\nnf_hook_entry_hookfn include/linux/netfilter.h:144 [inline]\nnf_hook_bridge_pre net/bridge/br_input.c:272 [inline]\nbr_handle_frame+0x4c9/0x940 net/bridge/br_input.c:417\n__netif_receive_skb_core+0xa8a/0x21e0 net/core/dev.c:5417\n__netif_receive_skb_one_core net/core/dev.c:5521 [inline]\n__netif_receive_skb+0x57/0x1b0 net/core/dev.c:5637\nprocess_backlog+0x21f/0x380 net/core/dev.c:5965\n__napi_poll+0x60/0x3b0 net/core/dev.c:6527\nnapi_poll net/core/dev.c:6594 [inline]\nnet_rx_action+0x32b/0x750 net/core/dev.c:6727\n__do_softirq+0xc1/0x265 kernel/softirq.c:553\ndo_softirq+0x5e/0x90 kernel/softirq.c:454\n__local_bh_enable_ip+0x64/0x70 kernel/softirq.c:381\n__raw_spin_unlock_bh include/linux/spinlock_api_smp.h:167 [inline]\n_raw_spin_unlock_bh+0x36/0x40 kernel/locking/spinlock.c:210\nspin_unlock_bh include/linux/spinlock.h:396 [inline]\nbatadv_tt_local_purge+0x1a8/0x1f0 net/batman-adv/translation-table.c:1356\nbatadv_tt_purge+0x2b/0x630 net/batman-adv/translation-table.c:3560\nprocess_one_work kernel/workqueue.c:2630 [inline]\nprocess_scheduled_works+0x5b8/0xa30 kernel/workqueue.c:2703\nworker_thread+0x525/0x730 kernel/workqueue.c:2784\nkthread+0x1d7/0x210 kernel/kthread.c:388\nret_from_fork+0x48/0x60 arch/x86/kernel/process.c:147\nret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304\n\nvalue changed: 0x00000000000d7190 -\u003e 0x00000000000d7191\n\nReported by Kernel Concurrency Sanitizer on:\nCPU: 0 PID: 14848 Comm: kworker/u4:11 Not tainted 6.6.0-rc1-syzkaller-00236-gad8a69f361b9 #0",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: net: bridge: data races indata-races in br_handle_frame_finish()",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2023-52578"
},
{
"category": "external",
"summary": "RHBZ#2267758",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2267758"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2023-52578",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-52578"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2023-52578",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-52578"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2024030257-CVE-2023-52578-50cb@gregkh/T/#u",
"url": "https://lore.kernel.org/linux-cve-announce/2024030257-CVE-2023-52578-50cb@gregkh/T/#u"
}
],
"release_date": "2024-03-02T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2024-05-31T15:51:49+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.",
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{
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"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 4.7,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
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"details": "Low"
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"title": "kernel: net: bridge: data races indata-races in br_handle_frame_finish()"
},
{
"cve": "CVE-2024-1086",
"cwe": {
"id": "CWE-416",
"name": "Use After Free"
},
"discovery_date": "2024-01-31T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2262126"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the Netfilter subsystem in the Linux kernel. This issue occurs in the nft_verdict_init() function, allowing positive values as a drop error within the hook verdict, therefore, the nf_hook_slow() function can cause a double-free vulnerability when NF_DROP is issued with a drop error that resembles NF_ACCEPT. The nf_tables component can be exploited to achieve local privilege escalation.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: nf_tables: use-after-free vulnerability in the nft_verdict_init() function",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This flaw is rated as having an Important impact. There is the limitation that it can only be exploited by a local user with access to Netfilter, but can still allow privilege escalation if user namespaces are enabled and Netfilter is being used.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2024-1086"
},
{
"category": "external",
"summary": "RHBZ#2262126",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2262126"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2024-1086",
"url": "https://www.cve.org/CVERecord?id=CVE-2024-1086"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2024-1086",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-1086"
},
{
"category": "external",
"summary": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f342de4e2f33e0e39165d8639387aa6c19dff660",
"url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f342de4e2f33e0e39165d8639387aa6c19dff660"
},
{
"category": "external",
"summary": "https://kernel.dance/f342de4e2f33e0e39165d8639387aa6c19dff660",
"url": "https://kernel.dance/f342de4e2f33e0e39165d8639387aa6c19dff660"
},
{
"category": "external",
"summary": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog"
}
],
"release_date": "2024-01-31T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2024-05-31T15:51:49+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.",
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"url": "https://access.redhat.com/errata/RHSA-2024:3528"
},
{
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"threats": [
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"category": "exploit_status",
"date": "2024-05-30T00:00:00+00:00",
"details": "CISA: https://www.cisa.gov/known-exploited-vulnerabilities-catalog"
},
{
"category": "impact",
"details": "Important"
}
],
"title": "kernel: nf_tables: use-after-free vulnerability in the nft_verdict_init() function"
}
]
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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