CVE-2020-10769 kernel: Buffer over-read in crypto_authenc_extractkeys() when a payload longer than 4 bytes is not aligned.

                							

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CVE-2020-10769 kernel: Buffer over-read in crypto_authenc_extractkeys() when a payload longer than 4 bytes is not aligned.

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From: Rohit Keshri &lt;rkeshri () redhat com&gt;

Date: Tue, 23 Jun 2020 16:52:12 +0530

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Hello Team,

Red Hats kernel has a flaw in Authenticated Encryption with Associated Data
(AEAD), a form of encryption technique which
simultaneously assures the confidentiality and authenticity of data with
below details.

A buffer over-read flaw was found in crypto_authenc_extractkeys in
crypto/authenc.c  in  the IPsec Cryptographic  algorithm’s
module, authenc. When a payload is longer than 4 bytes, and is not
following 4-byte alignment boundary guidelines, it causes
a buffer over-read threat, leading to a system crash. This flaw allows a
local attacker with  user  privileges  to  cause a  denial
of service.

'CVE-2020-10769' was assigned by Red Hat Inc.

Upstream fix:
https://lkml.org/lkml/2019/1/21/675

Thank you
..
Rohit Keshri / Red Hat Product Security Team
PGP: OX01BC 858A 07B7 15C8 EF33 BFE2 2EEB 0CBC 84A4 4C2D

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Current thread:

CVE-2020-10769 kernel: Buffer over-read in crypto_authenc_extractkeys() when a payload longer than 4 bytes is not aligned. Rohit Keshri (Jun 23)

Re: CVE-2020-10769 kernel: Buffer over-read in crypto_authenc_extractkeys() when a payload longer than 4 bytes is not aligned. Eric Biggers (Jun 23)

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