Linux Kernel up to 4.4.0 IOCTL Call sound/core/timer.c snd_timer_interrupt race condition

CVSS Meta Temp Score
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CTI Interest Score
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7.3$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 4.4.0. It has been declared as problematic. Impacted is the function snd_timer_interrupt of the file sound/core/timer.c of the component IOCTL Call Handler. The manipulation results in race condition. This vulnerability is identified as CVE-2016-2545. The attack can be executed remotely. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in Linux Kernel up to 4.4.0 (Operating System). Affected is the function snd_timer_interrupt of the file sound/core/timer.c of the component IOCTL Call Handler. The manipulation with an unknown input leads to a race condition vulnerability. CWE is classifying the issue as CWE-362. The product contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

The snd_timer_interrupt function in sound/core/timer.c in the Linux kernel before 4.4.1 does not properly maintain a certain linked list, which allows local users to cause a denial of service (race condition and system crash) via a crafted ioctl call.

The weakness was released 04/27/2016 (Website). The advisory is shared for download at github.com. This vulnerability is traded as CVE-2016-2545 since 02/22/2016. The attack needs to be approached locally. Required for exploitation is a authentication. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 89122 (Debian DSA-3503-1 : linux - security update), 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 157744 (Oracle Enterprise Linux Security Update for Unbreakable Enterprise kernel (ELSA-2018-4145)).

Upgrading to version 4.4.1 eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (89122) and SecurityFocus (BID 83381†). Entries connected to this vulnerability are available at VDB-80982, VDB-81408, VDB-82946 and VDB-82955. Once again VulDB remains the best source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.3

VulDB Base Score: 9.8
VulDB Temp Score: 9.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.1
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Race condition
CWE: CWE-362
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: 89122
Nessus Name: Debian DSA-3503-1 : linux - security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 703503
OpenVAS Name: Debian Security Advisory DSA 3503-1 (linux - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 4.4.1
Patch: git.kernel.org

Timelineinfo

02/22/2016 🔍
02/22/2016 +0 days 🔍
03/02/2016 +9 days 🔍
03/03/2016 +1 days 🔍
04/27/2016 +54 days 🔍
04/27/2016 +0 days 🔍
04/28/2016 +1 days 🔍
07/27/2022 +2281 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: USN-2929-1
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-2545 (🔍)
GCVE (CVE): GCVE-0-2016-2545
GCVE (VulDB): GCVE-100-82956

OVAL: 🔍

SecurityFocus: 83381 - Linux Kernel 'sound/core/timer.c' Local Denial of Service Vulnerability
SecurityTracker: 1035296

See also: 🔍

Entryinfo

Created: 04/28/2016 10:24
Updated: 07/27/2022 08:08
Changes: 04/28/2016 10:24 (69), 10/29/2018 05:52 (13), 07/27/2022 08:08 (6)
Complete: 🔍
Cache ID: 216::103

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