util-linux Child Process login-utils/su-common.c race condition

CVSS Meta Temp Score
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CTI Interest Score
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4.5$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in util-linux. The affected element is an unknown function of the file login-utils/su-common.c of the component Child Process Handler. Performing a manipulation results in race condition. This vulnerability is known as CVE-2017-2616. Attacking locally is a requirement. No exploit is available. To fix this issue, it is recommended to deploy a patch.

Detailsinfo

A vulnerability classified as problematic has been found in util-linux (the affected version is unknown). This affects an unknown code of the file login-utils/su-common.c of the component Child Process 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 availability. The summary by CVE is:

A race condition was found in util-linux before 2.32.1 in the way su handled the management of child processes. A local authenticated attacker could use this flaw to kill other processes with root privileges under specific conditions.

The bug was discovered 03/21/2017. The weakness was published 02/01/2017 by Tobias Stoeckmann as confirmed git commit (GIT Repository). It is possible to read the advisory at git.kernel.org. This vulnerability is uniquely identified as CVE-2017-2616 since 12/01/2016. Attacking locally is a requirement. A authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 97450 (Fedora 25 : util-linux (2017-20710607f5)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 175969 (Debian Security Update for shadow (DSA 3793-1)).

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 databases at Tenable (97450), SecurityFocus (BID 96404†) and SecurityTracker (ID 1038271†). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Name

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.5
VulDB Meta Temp Score: 4.5

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

NVD Base Score: 4.7
NVD Vector: 🔍

CNA Base Score: 5.5
CNA Vector (Red Hat, Inc.): 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
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NVD Base Score: 🔍

Exploitinginfo

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

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 97450
Nessus Name: Fedora 25 : util-linux (2017-20710607f5)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 881932
OpenVAS Name: CentOS Update for libblkid CESA-2017:0907 centos7
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

12/01/2016 🔍
02/01/2017 +62 days 🔍
02/01/2017 +0 days 🔍
02/22/2017 +21 days 🔍
03/01/2017 +7 days 🔍
03/21/2017 +20 days 🔍
04/14/2017 +24 days 🔍
04/30/2017 +16 days 🔍
07/27/2018 +452 days 🔍
12/02/2022 +1589 days 🔍

Sourcesinfo

Advisory: FEDORA-2017-20710607f5
Researcher: Tobias Stoeckmann
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-2616 (🔍)
GCVE (CVE): GCVE-0-2017-2616
GCVE (VulDB): GCVE-100-100755

OVAL: 🔍

SecurityFocus: 96404 - util-linux CVE-2017-2616 Local Denial of Service Vulnerability
OSVDB: - CVE-2017-2616 - util-linux - Denial of Service Issue
SecurityTracker: 1038271

Entryinfo

Created: 05/01/2017 00:24
Updated: 12/02/2022 15:02
Changes: 05/01/2017 00:24 (78), 09/22/2020 16:08 (6), 12/22/2020 10:11 (3), 12/02/2022 14:55 (3), 12/02/2022 14:59 (12), 12/02/2022 15:02 (1)
Complete: 🔍
Cache ID: 216:DF6:103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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