CVE-2015-8970

kernel: crypto: GPF in lrw_crypt caused by null-deref

Severity Score

5.5

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

crypto/algif_skcipher.c in the Linux kernel before 4.4.2 does not verify that a setkey operation has been performed on an AF_ALG socket before an accept system call is processed, which allows local users to cause a denial of service (NULL pointer dereference and system crash) via a crafted application that does not supply a key, related to the lrw_crypt function in crypto/lrw.c.

crypto/algif_skcipher.c en el kernel Linux en versiones anteriores a 4.4.2 no verifica que una operación setkey haya sido llevada a cabo en un enchufe AF_ALG antes de que una llamada de sistema aceptada sea procesada, lo que permite a usuarios locales provocar una denegación de servicio (referencia a puntero NULO y caída de sistema) a través de una aplicación manipulada que no aporta una llave, relacionado con la función lrw_crypt en crypto/lrw.c.

The lrw_crypt() function in 'crypto/lrw.c' in the Linux kernel before 4.5 allows local users to cause a system crash and a denial of service by the NULL pointer dereference via accept(2) system call for AF_ALG socket without calling setkey() first to set a cipher key.

*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

2016-11-04 CVE Reserved
2016-11-28 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 (12)

URL	Tag	Source
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.2	Release Notes
http://www.openwall.com/lists/oss-security/2016/11/04/3	Mailing List
http://www.securityfocus.com/bid/94217	Third Party Advisory
https://groups.google.com/forum/#%21msg/syzkaller/frb2XrB5aWk/xCXzkIBcDAAJ	X_refsource_confirm

URL	Date	SRC

URL	Date	SRC
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=dd504589577d8e8e70f51f997ad487a4cb6c026f	2023-02-13
https://github.com/torvalds/linux/commit/dd504589577d8e8e70f51f997ad487a4cb6c026f	2023-02-13

URL	Date	SRC
https://access.redhat.com/errata/RHSA-2017:1842	2023-02-13
https://access.redhat.com/errata/RHSA-2017:2077	2023-02-13
https://access.redhat.com/errata/RHSA-2017:2437	2023-02-13
https://access.redhat.com/errata/RHSA-2017:2444	2023-02-13
https://bugzilla.redhat.com/show_bug.cgi?id=1386286	2017-08-08
https://access.redhat.com/security/cve/CVE-2015-8970	2017-08-08

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"				<= 4.4.1 Search vendor "Linux" for product "Linux Kernel" and version " <= 4.4.1"		-		Affected