Linux Kernel TTY Subsystem Shutdown race condition

CVSS Meta Temp Score
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CTI Interest Score
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4.4$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Linux Kernel. This affects an unknown function of the component TTY Subsystem. Performing a manipulation as part of Shutdown results in race condition. This vulnerability is cataloged as CVE-2015-4170. The attack must be initiated from a local position. There is no exploit available. To fix this issue, it is recommended to deploy a patch.

Detailsinfo

A vulnerability classified as problematic has been found in Linux Kernel (Operating System) (affected version unknown). This affects an unknown functionality of the component TTY Subsystem. The manipulation as part of a Shutdown 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 availability.

The weakness was shared 05/26/2015 as Bug 1218879 as confirmed bug report (Bugzilla). It is possible to read the advisory at bugzilla.redhat.com. This vulnerability is uniquely identified as CVE-2015-4170 since 06/02/2015. Attacking locally is a requirement. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 87559 (Scientific Linux Security Update : kernel on SL7.x x86_64), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Scientific Linux Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 124484 (CentOS Security Update for kernel (CESA-2015:2152)).

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 7 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (103596), Tenable (87559) and SecurityFocus (BID 74820†). Further details are available at bugzilla.redhat.com. The entry VDB-78509 is related to this item. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.7
VulDB Meta Temp Score: 4.4

VulDB Base Score: 4.7
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 4.7
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Race condition
CWE: CWE-362
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 87559
Nessus Name: Scientific Linux Security Update : kernel on SL7.x x86_64
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 802833
OpenVAS Name: Oracle Linux Local Check: ELSA-2015-2152
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: 🔍

Patch: git.kernel.org

Timelineinfo

05/26/2015 🔍
05/26/2015 +0 days 🔍
06/02/2015 +7 days 🔍
06/04/2015 +2 days 🔍
11/19/2015 +167 days 🔍
12/22/2015 +33 days 🔍
05/02/2016 +132 days 🔍
05/20/2022 +2209 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: Bug 1218879
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2015-4170 (🔍)
GCVE (CVE): GCVE-0-2015-4170
GCVE (VulDB): GCVE-100-75699
X-Force: 103596 - Linux Kernel tty subsystem denial of service
SecurityFocus: 74820 - Linux Kernel 'tty/tty_ldsem.c' Local Race Condition Vulnerability

Misc.: 🔍
See also: 🔍

Entryinfo

Created: 06/04/2015 10:37
Updated: 05/20/2022 07:13
Changes: 06/04/2015 10:37 (75), 04/03/2019 12:37 (11), 05/20/2022 07:13 (4)
Complete: 🔍
Cache ID: 216::103

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