Linux Kernel up to 2.6.19 netlabel_cipso_v4.c nla_for_each_nested doi_def->tags[iter] memory corruption

Summaryinfo

A vulnerability classified as critical has been found in Linux Kernel up to 2.6.19. Affected by this issue is the function nla_for_each_nested of the file net/netlabel/netlabel_cipso_v4.c. This manipulation of the argument doi_def->tags[iter] causes memory corruption. This vulnerability is registered as CVE-2007-6762. Remote exploitation of the attack is possible. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Linux Kernel up to 2.6.19 (Operating System) and classified as critical. Affected by this vulnerability is the function nla_for_each_nested of the file net/netlabel/netlabel_cipso_v4.c. The manipulation of the argument doi_def->tags[iter] with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

In the Linux kernel before 2.6.20, there is an off-by-one bug in net/netlabel/netlabel_cipso_v4.c where it is possible to overflow the doi_def->tags[] array.

The weakness was published 07/28/2019. This vulnerability is known as CVE-2007-6762 since 07/27/2019. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available. Responsible for the vulnerability is the following code:

if (iter > CIPSO_V4_TAG_MAXCNT)

Upgrading to version 2.6.20 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version. The vulnerability will be addressed with the following lines of code:

if (iter >= CIPSO_V4_TAG_MAXCNT)

Additional details are provided at git.kernel.org. Similar entries are available at VDB-138869, VDB-138868, VDB-138867 and VDB-138866. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 2.6.0
• 2.6.1
• 2.6.2
• 2.6.3
• 2.6.4
• 2.6.5
• 2.6.6
• 2.6.7
• 2.6.8
• 2.6.9
• 2.6.10
• 2.6.11
• 2.6.12
• 2.6.13
• 2.6.14
• 2.6.15
• 2.6.16
• 2.6.17
• 2.6.18
• 2.6.19

License

• open-source

Website

• Vendor: https://www.kernel.org/

CPE 2.3info

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CPE 2.2info

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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