Linux Kernel up to 3.5.4 on ARM v6k/v7 API Function get_user/put_user input validation

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.5$0-$5k0.00

A vulnerability, which was classified as critical, was found in Linux Kernel up to 3.5.4 on ARM v6k/v7 (Operating System). Affected is the function get_user/put_user of the component API Function Handler. The manipulation with an unknown input leads to a input validation vulnerability. CWE is classifying the issue as CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the v6k and v7 ARM platforms do not validate certain addresses, which allows attackers to read or modify the contents of arbitrary kernel memory locations via a crafted application, as exploited in the wild against Android devices in October and November 2013.

The weakness was released 09/09/2012 as QCIR-2013-00010-1 as confirmed advisory (Website). The advisory is available at codeaurora.org. This vulnerability is traded as CVE-2013-6282 since 10/25/2013. Local access is required to approach this attack. The requirement for exploitation is a authentication. Technical details and a public exploit are known.

A public exploit has been developed by Piotr Szerman and been published 2 years after the advisory. The exploit is shared for download at exploit-db.com. It is declared as highly functional. As 0-day the estimated underground price was around $5k-$25k. The commercial vulnerability scanner Qualys is able to test this issue with plugin 195830 (Ubuntu Security Notification for Linux-ti-omap4 Vulnerabilities (USN-2067-1)). This issue was added on 09/15/2022 to the CISA Known Exploited Vulnerabilities Catalog with a due date of 10/06/2022:

Apply updates per vendor instructions.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Exploit-DB (31574). Entry connected to this vulnerability is available at 11224.

Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

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

CVSSv3info

VulDB Meta Base Score: 7.8
VulDB Meta Temp Score: 7.5

VulDB Base Score: 7.8
VulDB Temp Score: 7.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
unlockunlockunlockunlockunlockunlock
unlockunlockunlockunlockunlockunlock
unlockunlockunlockunlockunlockunlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
ATT&CK: Unknown

Local: Yes
Remote: No

Availability: 🔍
Access: Public
Status: Highly functional
Author: Piotr Szerman
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

KEV Added: 🔍
KEV Due: 🔍
KEV Remediation: 🔍
KEV Ransomware: 🔍
KEV Notice: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Dayunlockunlockunlockunlock
Todayunlockunlockunlockunlock

OpenVAS ID: 841674
OpenVAS Name: Ubuntu Update for linux-ti-omap4 USN-2067-1
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

MetaSploit ID: put_user_vroot.rb
MetaSploit Name: Android get_user/put_user Exploit
MetaSploit File: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍
Exploit Delay Time: 🔍

Patch: git.kernel.org

Timelineinfo

09/09/2012 🔍
09/09/2012 +0 days 🔍
10/25/2013 +411 days 🔍
11/14/2013 +19 days 🔍
11/14/2013 +0 days 🔍
11/18/2013 +4 days 🔍
11/20/2013 +2 days 🔍
11/22/2013 +2 days 🔍
02/11/2014 +81 days 🔍
02/11/2014 +0 days 🔍
06/02/2021 +2668 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: QCIR-2013-00010-1
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2013-6282 (🔍)
OVAL: 🔍

Vulnerability Center: 42323 - Linux Kernel Local Privilege Memory Access and Security Bypass Vulnerability via get_user and put_user API Functions on ARM, Medium
SecurityFocus: 63734
OSVDB: 99940

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 11/22/2013 09:41
Updated: 06/02/2021 11:16
Changes: 11/22/2013 09:41 (72), 05/15/2017 11:37 (12), 06/02/2021 11:16 (4)
Complete: 🔍

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Are you interested in using VulDB?

Download the whitepaper to learn more about our service!