7.8
HIGH
CVE-2023-4208
Linux Kernel - Net/sched: cls_u32 Use-After-Free Privilege Escalation
Description

A use-after-free vulnerability in the Linux kernel's net/sched: cls_u32 component can be exploited to achieve local privilege escalation. When u32_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 3044b16e7c6fe5d24b1cdbcf1bd0a9d92d1ebd81.

INFO

Published Date :

Sept. 6, 2023, 2:15 p.m.

Last Modified :

Nov. 21, 2024, 8:34 a.m.

Source :

[email protected]

Remotely Exploitable :

No

Impact Score :

5.9

Exploitability Score :

1.8
Public PoC/Exploit Available at Github

CVE-2023-4208 has a 1 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

Affected Products

The following products are affected by CVE-2023-4208 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Linux linux_kernel
1 Debian debian_linux
: Total Affected Vendor : 2 | Products : 2
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2023-4208.

URL Resource
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3044b16e7c6fe5d24b1cdbcf1bd0a9d92d1ebd81 Vendor Advisory
https://kernel.dance/3044b16e7c6fe5d24b1cdbcf1bd0a9d92d1ebd81 Vendor Advisory
https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html Third Party Advisory
https://www.debian.org/security/2023/dsa-5492 Third Party Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3044b16e7c6fe5d24b1cdbcf1bd0a9d92d1ebd81 Vendor Advisory
https://kernel.dance/3044b16e7c6fe5d24b1cdbcf1bd0a9d92d1ebd81 Vendor Advisory
https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html Third Party Advisory
https://www.debian.org/security/2023/dsa-5492 Third Party Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Profile Photo
hshivhare67/Kernel_4.1.15_CVE-2023-4206_CVE-2023-4207_CVE-2023-4208

None

Makefile C Assembly Shell Perl C++ Awk sed Python GDB

Updated: 1 year ago
0 stars 0 fork 0 watcher
Born at : Dec. 15, 2023, 5:13 a.m. This repo has been linked 3 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2023-4208 vulnerability anywhere in the article.

  • Cybersecurity News
Linux Kernel Vulnerabilities Expose Systems to Privilege Escalation: Flaws Detailed and Exploit Code Released

Security researchers have disclosed the technical details and proof-of-concept (PoC) exploit codes for three vulnerabilities (CVE-2023-4206, CVE-2023-4207, and CVE-2023-4208) in the Linux kernel, impa ... Read more

Published Date: Aug 14, 2024 (4 months, 2 weeks ago)
CVE-2024-3246 CVE-2024-39877 CVE-2024-0646 CVE-2023-4208 CVE-2023-4207 CVE-2023-4206

The following table lists the changes that have been made to the CVE-2023-4208 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3044b16e7c6fe5d24b1cdbcf1bd0a9d92d1ebd81
    Added Reference https://kernel.dance/3044b16e7c6fe5d24b1cdbcf1bd0a9d92d1ebd81
    Added Reference https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html
    Added Reference https://www.debian.org/security/2023/dsa-5492
  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • Modified Analysis by [email protected]

    Feb. 15, 2024

    Action Type Old Value New Value
    Changed Reference Type https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html No Types Assigned https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html Third Party Advisory
    Changed CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions up to (excluding) 6.5 OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 3.18 up to (excluding) 4.14.322 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.15 up to (excluding) 4.19.291 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.20 up to (excluding) 5.4.253 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.5 up to (excluding) 5.10.190 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.15.126 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16 up to (excluding) 6.1.45 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 up to (excluding) 6.4.10
  • CVE Modified by [email protected]

    Jan. 11, 2024

    Action Type Old Value New Value
    Added Reference Google Inc. https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html [No types assigned]
  • Initial Analysis by [email protected]

    Sep. 11, 2023

    Action Type Old Value New Value
    Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
    Changed Reference Type https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3044b16e7c6fe5d24b1cdbcf1bd0a9d92d1ebd81 No Types Assigned https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3044b16e7c6fe5d24b1cdbcf1bd0a9d92d1ebd81 Vendor Advisory
    Changed Reference Type https://kernel.dance/3044b16e7c6fe5d24b1cdbcf1bd0a9d92d1ebd81 No Types Assigned https://kernel.dance/3044b16e7c6fe5d24b1cdbcf1bd0a9d92d1ebd81 Vendor Advisory
    Changed Reference Type https://www.debian.org/security/2023/dsa-5492 No Types Assigned https://www.debian.org/security/2023/dsa-5492 Third Party Advisory
    Added CWE NIST CWE-416
    Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions up to (excluding) 6.5
    Added CPE Configuration OR *cpe:2.3:o:debian:debian_linux:12.0:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Sep. 10, 2023

    Action Type Old Value New Value
    Added Reference https://www.debian.org/security/2023/dsa-5492 [No Types Assigned]
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2023-4208 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2023-4208 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.04 }} -0.01%

score

0.05712

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
: