CVE-2017-17806

CVE Details

Release Date:	2017-12-20
Impact:	Moderate	What is this?

Description

The HMAC implementation (crypto/hmac.c) in the Linux kernel before 4.14.8 does not validate that the underlying cryptographic hash algorithm is unkeyed, allowing a local attacker able to use the AF_ALG-based hash interface (CONFIG_CRYPTO_USER_API_HASH) and the SHA-3 hash algorithm (CONFIG_CRYPTO_SHA3) to cause a kernel stack buffer overflow by executing a crafted sequence of system calls that encounter a missing SHA-3 initialization.

See more information about CVE-2017-17806 from MITRE CVE dictionary and NIST NVD

NOTE: The following CVSS metrics and score provided are preliminary and subject to review.

CVSS v3 metrics

Base Score:	7.8
Vector String:	CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Version:	3.0
Attack Vector:	Local
Attack Complexity:	Low
Privileges Required:	Low
User Interaction:	None
Scope:	Unchanged
Confidentiality Impact:	High
Integrity Impact:	High
Availability Impact:	High

Errata information

Platform	Errata	Release Date
Oracle Linux version 5 (kernel-uek)	ELSA-2018-4301	2018-12-09
Oracle Linux version 6 (dtrace-modules-3.8.13-118.28.1.el6uek)	ELSA-2018-4300	2018-12-06
Oracle Linux version 6 (dtrace-modules-3.8.13-118.29.1.el6uek)	ELSA-2019-4316	2019-01-04
Oracle Linux version 6 (kernel-uek)	ELSA-2018-4299	2018-12-06
Oracle Linux version 6 (kernel-uek)	ELSA-2018-4300	2018-12-06
Oracle Linux version 6 (kernel-uek)	ELSA-2018-4301	2018-12-09
Oracle Linux version 6 (kernel-uek)	ELSA-2019-4316	2019-01-04
Oracle Linux version 7 (dtrace-modules-3.8.13-118.28.1.el7uek)	ELSA-2018-4300	2018-12-06
Oracle Linux version 7 (dtrace-modules-3.8.13-118.29.1.el7uek)	ELSA-2019-4316	2019-01-04
Oracle Linux version 7 (kernel-uek)	ELSA-2018-4299	2018-12-06
Oracle Linux version 7 (kernel-uek)	ELSA-2018-4300	2018-12-06
Oracle Linux version 7 (kernel-uek)	ELSA-2019-4316	2019-01-04
Oracle VM version 3.4 (kernel-uek)	OVMSA-2018-0286	2018-12-07