CVE-2011-5321

Kernel: tty: driver reference leakage in tty_open

Severity Score

5.5

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

The tty_open function in drivers/tty/tty_io.c in the Linux kernel before 3.1.1 mishandles a driver-lookup failure, which allows local users to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact via crafted access to a device file under the /dev/pts directory.

La función tty_open en drivers/tty/tty_io.c en el kernel de Linux en versiones anteriores a 3.1.1 no maneja adecuadamente un fallo de búsqueda de controlador, lo que permite a usuarios locales provocar una denegación de servicio (referencia a puntero NULL y caída de sistema) o posiblemente tener otro impacto no especificado a través de acceso manipulado a un archivo de dispositivo bajo el directorio /dev/pts.

A NULL pointer dereference flaw was found in the way the Linux kernel's virtual console implementation handled reference counting when accessing pseudo-terminal device files (/dev/pts/*). A local, unprivileged attacker could use this flaw to crash the system.

*Credits: N/A

CVSS Scores

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

Attack Vector

Local

Attack Complexity

Medium

Authentication

None

Confidentiality

None

Integrity

None

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2015-03-13 CVE Reserved
2015-07-16 CVE Published
2023-03-08 EPSS Updated
2024-08-07 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CAPEC

References (7)

URL	Tag	Source
http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.1.1	X_refsource_confirm
http://www.openwall.com/lists/oss-security/2015/03/13/17	Mailing List

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c290f8358acaeffd8e0c551ddcc24d1206143376	2018-01-05
http://rhn.redhat.com/errata/RHSA-2015-1221.html	2018-01-05
https://bugzilla.redhat.com/show_bug.cgi?id=1201887	2015-07-14
https://github.com/torvalds/linux/commit/c290f8358acaeffd8e0c551ddcc24d1206143376	2018-01-05
https://access.redhat.com/security/cve/CVE-2011-5321	2015-07-14

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"				<= 3.1 Search vendor "Linux" for product "Linux Kernel" and version " <= 3.1"		-		Affected