SUSE-SU-2023:3768-1
Vulnerability from csaf_suse - Published: 2023-09-25 22:04 - Updated: 2023-09-25 22:04Summary
Security update for the Linux Kernel (Live Patch 35 for SLE 15 SP1)
Severity
Important
Notes
Title of the patch: Security update for the Linux Kernel (Live Patch 35 for SLE 15 SP1)
Description of the patch: This update for the Linux Kernel 4.12.14-150100_197_126 fixes several issues.
The following security issues were fixed:
- CVE-2023-1829: Fixed a use-after-free vulnerability in the control index filter (tcindex) (bsc#1210619).
- CVE-2023-3776: Fixed improper refcount update in cls_fw leads to use-after-free (bsc#1215119).
- CVE-2023-3609: Fixed reference counter leak leading to overflow in net/sched (bsc#1213587).
- CVE-2023-3812: Fixed an out-of-bounds memory access flaw in the TUN/TAP device driver functionality that could allow a local user to crash or potentially escalate their privileges on the system (bsc#1213706).
Patchnames: SUSE-2023-3768,SUSE-SLE-Module-Live-Patching-15-SP1-2023-3768
Terms of use: CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).
7.8 (High)
Vendor Fix
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Vendor Fix
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Vendor Fix
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
7.8 (High)
Vendor Fix
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
References
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"text": "A use-after-free vulnerability in the Linux Kernel traffic control index filter (tcindex) can be exploited to achieve local privilege escalation. The tcindex_delete function which does not properly deactivate filters in case of a perfect hashes while deleting the underlying structure which can later lead to double freeing the structure. A local attacker user can use this vulnerability to elevate its privileges to root.\nWe recommend upgrading past commit 8c710f75256bb3cf05ac7b1672c82b92c43f3d28.",
"title": "CVE description"
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"text": "A use-after-free vulnerability in the Linux kernel\u0027s net/sched: cls_u32 component can be exploited to achieve local privilege escalation.\n\nIf tcf_change_indev() fails, u32_set_parms() will immediately return an error after incrementing or decrementing the reference counter in tcf_bind_filter(). If an attacker can control the reference counter and set it to zero, they can cause the reference to be freed, leading to a use-after-free vulnerability.\n\nWe recommend upgrading past commit 04c55383fa5689357bcdd2c8036725a55ed632bc.",
"title": "CVE description"
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"text": "A use-after-free vulnerability in the Linux kernel\u0027s net/sched: cls_fw component can be exploited to achieve local privilege escalation.\n\nIf tcf_change_indev() fails, fw_set_parms() will immediately return an error after incrementing or decrementing the reference counter in tcf_bind_filter(). If an attacker can control the reference counter and set it to zero, they can cause the reference to be freed, leading to a use-after-free vulnerability.\n\nWe recommend upgrading past commit 0323bce598eea038714f941ce2b22541c46d488f.",
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"text": "An out-of-bounds memory access flaw was found in the Linux kernel\u0027s TUN/TAP device driver functionality in how a user generates a malicious (too big) networking packet when napi frags is enabled. This flaw allows a local user to crash or potentially escalate their privileges on the system.",
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"title": "CVE-2023-3812"
}
]
}
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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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