Executive Summary

Informations
Name CVE-2023-4207 First vendor Publication 2023-09-06
Vendor Cve Last vendor Modification 2025-02-13

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Overall CVSS Score 7.8
Base Score 7.8 Environmental Score 7.8
impact SubScore 5.9 Temporal Score 7.8
Exploitabality Sub Score 1.8
 
Attack Vector Local Attack Complexity Low
Privileges Required Low User Interaction None
Scope Unchanged Confidentiality Impact High
Integrity Impact High Availability Impact High
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector :
Cvss Base Score N/A Attack Range N/A
Cvss Impact Score N/A Attack Complexity N/A
Cvss Expoit Score N/A Authentication N/A
Calculate full CVSS 2.0 Vectors scores

Detail

A use-after-free vulnerability in the Linux kernel's net/sched: cls_fw component can be exploited to achieve local privilege escalation.

When fw_change() is called on an existing filter, the whole tcf_result struct is always copied into the new instance of the filter. This causes a problem when updating a filter bound to a class, as tcf_unbind_filter() is always called on the old instance in the success path, decreasing filter_cnt of the still referenced class and allowing it to be deleted, leading to a use-after-free.

We recommend upgrading past commit 76e42ae831991c828cffa8c37736ebfb831ad5ec.

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-4207

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-416 Use After Free

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 8
Os 1
Os 3613

Sources (Detail)

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id...
https://kernel.dance/76e42ae831991c828cffa8c37736ebfb831ad5ec
https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html
https://www.debian.org/security/2023/dsa-5492
Source Url

Alert History

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Date Informations
2025-03-29 03:25:57
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2025-03-28 13:38:19
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2025-02-21 21:21:09
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2025-02-13 21:21:39
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2025-01-08 02:56:11
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2025-01-07 02:55:48
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2024-12-25 02:54:34
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2024-12-12 02:57:39
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2024-11-28 14:29:10
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2024-11-21 21:31:27
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2024-11-20 02:51:57
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2024-11-09 02:52:23
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2024-10-26 02:49:51
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2024-10-03 02:46:47
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2024-09-15 02:43:17
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2024-08-02 01:33:54
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2024-03-12 13:40:20
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2024-02-06 00:28:06
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2024-02-02 02:48:24
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2024-02-01 12:30:59
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2024-01-12 00:27:54
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2023-12-29 02:37:22
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2023-11-22 02:35:56
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2023-10-11 02:31:45
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2023-09-29 13:29:45
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2023-09-10 17:27:19
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2023-09-07 09:27:17
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2023-09-06 21:27:19
  • First insertion