A vulnerability has been found in NetBSD 6.0/6.1 (Operating System) and classified as problematic. Affected by this vulnerability is an unknown function of the component ELF Binary Handler. The manipulation with an unknown input leads to a denial of service vulnerability. The CWE definition for the vulnerability is CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. As an impact it is known to affect availability.

The weakness was released 12/19/2013 by Maxime Villard as NetBSD-SA2013-013 as confirmed advisory (FTP Server). The advisory is shared at ftp.netbsd.org. The public release was coordinated with the project team. An attack has to be approached locally. The successful exploitation requires a single authentication. Technical details are unknown but a private exploit is available. The advisory points out:

When trying to execute a binary (or script), the kernel looks up the corresponding "interpreter" (in case of native dynamic ELF binaries: the dynamic linker ld.elf_so). If this interpreter does not exist, the path buffer memory allocated for that interpreter during the probe was not freed.

It is declared as proof-of-concept. The advisory illustrates:

If a standard toolchain is installed, a local user can easily create such broken binaries by passing the -dynamic-linker switch to the linker.

Applying a patch is able to eliminate this problem. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

Entry connected to this vulnerability is available at 11642.

Productinfo

Type

• Operating System

Name

• NetBSD

Version

• 6.0
• 6.1

License

• open-source

CPE 2.3info

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CPE 2.2info

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