Linux Kernel up to 3.18 drivers/regulator/core.c regulator_ena_gpio_free Crafted Application use after free

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

Summaryinfo

A vulnerability classified as problematic has been found in Linux Kernel up to 3.18. This impacts the function regulator_ena_gpio_free of the file drivers/regulator/core.c. This manipulation as part of Crafted Application causes use after free. This vulnerability appears as CVE-2014-9940. The attack requires local access. There is no available exploit. Applying a patch is the recommended action to fix this issue.

Detailsinfo

A vulnerability has been found in Linux Kernel up to 3.18 (Operating System) and classified as problematic. Affected by this vulnerability is the function regulator_ena_gpio_free of the file drivers/regulator/core.c. The manipulation as part of a Crafted Application leads to a use after free vulnerability. The CWE definition for the vulnerability is CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. As an impact it is known to affect availability. The summary by CVE is:

The regulator_ena_gpio_free function in drivers/regulator/core.c in the Linux kernel before 3.19 allows local users to gain privileges or cause a denial of service (use-after-free) via a crafted application.

The bug was discovered 05/01/2017. The weakness was presented 05/03/2017 as confirmed git commit (GIT Repository). The advisory is shared at git.kernel.org. This vulnerability is known as CVE-2014-9940 since 03/28/2017. An attack has to be approached locally. Required for exploitation is a single authentication. Technical details are known, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 102550 (Debian DSA-3945-1 : linux - security update (Stack Clash)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 176126 (Debian Security Update for linux (DSA 3945-1)).

Upgrading to version 3.19 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be patching the affected component. A possible mitigation has been published 4 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (102550) and SecurityFocus (BID 98195†). See VDB-100814 for similar entry. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

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

VulDB Base Score: 3.3
VulDB Temp Score: 3.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.0
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 102550
Nessus Name: Debian DSA-3945-1 : linux - security update (Stack Clash)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 841810
OpenVAS Name: Ubuntu Update for linux USN-3343-1
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

Upgrade: Kernel 3.19
Patch: git.kernel.org

Timelineinfo

03/28/2017 🔍
05/01/2017 +34 days 🔍
05/02/2017 +1 days 🔍
05/02/2017 +0 days 🔍
05/03/2017 +1 days 🔍
05/03/2017 +0 days 🔍
08/17/2017 +106 days 🔍
08/18/2017 +1 days 🔍
12/06/2022 +1936 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: 60a2362f769cf549dc466134efe71c8bf9fbaaba
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2014-9940 (🔍)
GCVE (CVE): GCVE-0-2014-9940
GCVE (VulDB): GCVE-100-100813

OVAL: 🔍

SecurityFocus: 98195 - Linux kernel CVE-2014-9940 Local Privilege Escalation Vulnerability
OSVDB: - CVE-2014-9940 - Linux - Use-After-Free Issue

See also: 🔍

Entryinfo

Created: 05/03/2017 14:26
Updated: 12/06/2022 07:10
Changes: 05/03/2017 14:26 (89), 12/06/2022 07:10 (4)
Complete: 🔍
Cache ID: 216::103

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