Linux Kernel 2.6.36 hci_uart_tty_open null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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5.1$0-$5k0.00

A vulnerability was found in Linux Kernel 2.6.36 (Operating System) and classified as problematic. This issue affects the function hci_uart_tty_open. The manipulation with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. Impacted is availability. The summary by CVE is:

The hci_uart_tty_open function in the HCI UART driver (drivers/bluetooth/hci_ldisc.c) in the Linux kernel 2.6.36, and possibly other versions, does not verify whether the tty has a write operation, which allows local users to cause a denial of service (NULL pointer dereference) via vectors related to the Bluetooth driver.

The issue has been introduced in 10/20/2010. The weakness was presented 01/10/2011 by Alan Cox as Bug 641410 as not defined bug report (Bugzilla). It is possible to read the advisory at bugzilla.redhat.com. The identification of this vulnerability is CVE-2010-4242. The exploitation is known to be difficult. Attacking locally is a requirement. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 82 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 51426 (CentOS 5 : kernel (CESA-2011:0004)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CentOS Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 165551 (SUSE Enterprise Linux Security Update Linux Kernel (SUSE-SA:2011:008)).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at X-Force (64617) and Tenable (51426). See 55571, 55567, 56004 and 55923 for similar entries.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
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CVSSv3info

VulDB Meta Base Score: 5.1
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.1
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 51426
Nessus Name: CentOS 5 : kernel (CESA-2011:0004)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 68992
OpenVAS Name: Debian Security Advisory DSA 2153-1 (linux-2.6)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

10/07/2010 🔍
10/07/2010 +0 days 🔍
10/20/2010 +13 days 🔍
11/16/2010 +26 days 🔍
01/10/2011 +55 days 🔍
01/10/2011 +0 days 🔍
01/10/2011 +0 days 🔍
03/19/2015 +1529 days 🔍
10/11/2021 +2398 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: Bug 641410
Researcher: Alan Cox
Status: Not defined
Confirmation: 🔍

CVE: CVE-2010-4242 (🔍)
OVAL: 🔍
IAVM: 🔍

X-Force: 64617
Vulnerability Center: 29000 - Linux Kernel 2.6.0-2.6.37 \x27drivers/bluetooth/hci_ldisc.c\x27 Local DoS Vulnerability, Medium
SecurityFocus: 45014 - Linux Kernel 'hci_uart_tty_open()' Local Denial of Service Vulnerability
Secunia: 42789

See also: 🔍

Entryinfo

Created: 03/19/2015 23:27
Updated: 10/11/2021 12:04
Changes: 03/19/2015 23:27 (65), 03/13/2017 09:37 (12), 10/11/2021 11:56 (5), 10/11/2021 12:04 (1)
Complete: 🔍
Cache ID: 3:397:103

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