Linux Kernel up to 4.20.14 netlabel cipso_v4_map_lvl_valid out-of-bounds

Summaryinfo

A vulnerability marked as problematic has been reported in Linux Kernel up to 4.20.14. Affected by this issue is the function cipso_v4_map_lvl_valid of the component netlabel. The manipulation leads to out-of-bounds. This vulnerability is listed as CVE-2019-25160. There is no available exploit. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Linux Kernel up to 4.20.14 (Operating System). This issue affects the function cipso_v4_map_lvl_valid of the component netlabel. The manipulation with an unknown input leads to a out-of-bounds vulnerability. Using CWE to declare the problem leads to CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. Impacted is confidentiality. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: netlabel: fix out-of-bounds memory accesses There are two array out-of-bounds memory accesses, one in cipso_v4_map_lvl_valid(), the other in netlbl_bitmap_walk(). Both errors are embarassingly simple, and the fixes are straightforward. As a FYI for anyone backporting this patch to kernels prior to v4.8, you'll want to apply the netlbl_bitmap_walk() patch to cipso_v4_bitmap_walk() as netlbl_bitmap_walk() doesn't exist before Linux v4.8.

The weakness was presented 02/26/2024. It is possible to read the advisory at git.kernel.org. The identification of this vulnerability is CVE-2019-25160. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 239841 (TencentOS Server 4: kernel (TSSA-2024:0960)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 3.16.66, 3.18.137, 4.4.177, 4.9.163, 4.14.106, 4.19.28, 4.20.15 or 5.0 eliminates this vulnerability. Applying the patch 97bc3683c249/c61d01faa555/dc18101f95fa/1c973f9c7cc2/fcfe700acdc1/e3713abc4248/fbf9578919d6/5578de4834fe is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (239841). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 3.16.0
• 3.16.1
• 3.16.2
• 3.16.3
• 3.16.4
• 3.16.5
• 3.16.6
• 3.16.7
• 3.16.8
• 3.16.9
• 3.16.10
• 3.16.11
• 3.16.12
• 3.16.13
• 3.16.14
• 3.16.15
• 3.16.16
• 3.16.17
• 3.16.18
• 3.16.19
• 3.16.20
• 3.16.21
• 3.16.22
• 3.16.23
• 3.16.24
• 3.16.25
• 3.16.26
• 3.16.27
• 3.16.28
• 3.16.29
• 3.16.30
• 3.16.31
• 3.16.32
• 3.16.33
• 3.16.34
• 3.16.35
• 3.16.36
• 3.16.37
• 3.16.38
• 3.16.39
• 3.16.40
• 3.16.41
• 3.16.42
• 3.16.43
• 3.16.44
• 3.16.45
• 3.16.46
• 3.16.47
• 3.16.48
• 3.16.49
• 3.16.50
• 3.16.51
• 3.16.52
• 3.16.53
• 3.16.54
• 3.16.55
• 3.16.56
• 3.16.57
• 3.16.58
• 3.16.59
• 3.16.60
• 3.16.61
• 3.16.62
• 3.16.63
• 3.16.64
• 3.16.65
• 3.18.136
• 4.4.176
• 4.9.162
• 4.14.105
• 4.19.0
• 4.19.1
• 4.19.2
• 4.19.3
• 4.19.4
• 4.19.5
• 4.19.6
• 4.19.7
• 4.19.8
• 4.19.9
• 4.19.10
• 4.19.11
• 4.19.12
• 4.19.13
• 4.19.14
• 4.19.15
• 4.19.16
• 4.19.17
• 4.19.18
• 4.19.19
• 4.19.20
• 4.19.21
• 4.19.22
• 4.19.23
• 4.19.24
• 4.19.25
• 4.19.26
• 4.19.27
• 4.20.0
• 4.20.1
• 4.20.2
• 4.20.3
• 4.20.4
• 4.20.5
• 4.20.6
• 4.20.7
• 4.20.8
• 4.20.9
• 4.20.10
• 4.20.11
• 4.20.12
• 4.20.13
• 4.20.14

License

• open-source

Website

• Vendor: https://www.kernel.org/

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