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Vigil@nce - Linux kernel: NULL pointer dereference via keyring_search_aux

May 2017 by Vigil@nce

This bulletin was written by Vigil@nce : https://vigilance.fr/offer

SYNTHESIS OF THE VULNERABILITY

An attacker can force a NULL pointer to be dereferenced via keyring_search_aux() in the Linux kernel, in order to trigger a denial of service.

Impacted products: Debian, Linux.

Severity: 2/4.

Creation date: 17/03/2017.

DESCRIPTION OF THE VULNERABILITY

The Linux kernel manages cryptographic keys, notably for use in IPsec.

However, in the "request_key" system call, the function keyring_search_aux() does not check whether a pointer is NULL, before using it.

An attacker can therefore force a NULL pointer to be dereferenced via keyring_search_aux() in the Linux kernel, in order to trigger a denial of service.

ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN

https://vigilance.fr/vulnerability/...




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