CVE-2016-10147

kernel: Kernel crash by spawning mcrypt(alg) with incompatible algorithm

Severity Score

5.5

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

crypto/mcryptd.c in the Linux kernel before 4.8.15 allows local users to cause a denial of service (NULL pointer dereference and system crash) by using an AF_ALG socket with an incompatible algorithm, as demonstrated by mcryptd(md5).

crypto/mcryptd.c en el kernel de Linux en versiones anteriores a 4.8.15 permite a usuarios locales provocar una denegación de servicio (referencia a puntero NULL y caída del sistema) usando un socket AF_ALG con un algoritmo incompatible, según lo demostrado por mcryptd(md5).

Algorithms not compatible with mcryptd could be spawned by mcryptd with a direct crypto_alloc_tfm invocation using a "mcryptd(alg)" name construct. This causes mcryptd to crash the kernel if an arbitrary "alg" is incompatible and not intended to be used with mcryptd.

*Credits: N/A

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Local

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2017-01-18 CVE Reserved
2017-01-18 CVE Published
2023-03-08 EPSS Updated
2024-08-06 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-476: NULL Pointer Dereference

CAPEC

References (10)

URL	Tag	Source
http://marc.info/?l=linux-crypto-vger&m=148063683310477&w=2	Mailing List
http://www.openwall.com/lists/oss-security/2017/01/17/13	Mailing List
http://www.securityfocus.com/bid/95677	Vdb Entry

URL	Date	SRC

URL	Date	SRC
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=48a992727d82cb7db076fa15d372178743b1f4cd	2023-02-12
https://github.com/torvalds/linux/commit/48a992727d82cb7db076fa15d372178743b1f4cd	2023-02-12

URL	Date	SRC
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.8.15	2023-02-12
https://access.redhat.com/errata/RHSA-2017:1842	2023-02-12
https://access.redhat.com/errata/RHSA-2017:2077	2023-02-12
https://bugzilla.redhat.com/show_bug.cgi?id=1404200	2017-08-01
https://access.redhat.com/security/cve/CVE-2016-10147	2017-08-01

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				<= 4.8.14 Search vendor "Linux" for product "Linux Kernel" and version " <= 4.8.14"		-		Affected