authd Permission /etc/ident.key race condition

CVSS Meta Temp Score
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CTI Interest Score
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4.0$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, was found in authd. The affected element is an unknown function of the file /etc/ident.key of the component Permission. The manipulation results in race condition. This vulnerability is known as CVE-2016-4982. Attacking locally is a requirement. No exploit is available.

Detailsinfo

A vulnerability was found in authd (affected version not known). It has been classified as problematic. Affected is some unknown functionality of the file /etc/ident.key of the component Permission. 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. CVE summarizes:

authd sets weak permissions for /etc/ident.key, which allows local users to obtain the key by leveraging a race condition between the creation of the key, and the chmod to protect it.

The bug was discovered 06/13/2016. The weakness was published 07/17/2017 as Bug 1346051 as not defined bug report (Bugzilla). The advisory is shared for download at bugzilla.redhat.com. This vulnerability is traded as CVE-2016-4982 since 05/24/2016. The attack needs to be approached locally. A authentication is required for exploitation. There are known technical details, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 399 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 219517 (Linux Distros Unpatched Vulnerability : CVE-2016-4982), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Tenable (219517). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Name

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.0
VulDB Meta Temp Score: 4.0

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

NVD Base Score: 4.7
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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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: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 219517
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2016-4982

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

05/24/2016 🔍
06/13/2016 +20 days 🔍
07/17/2017 +399 days 🔍
07/17/2017 +0 days 🔍
07/17/2017 +0 days 🔍
03/04/2025 +2787 days 🔍

Sourcesinfo

Advisory: Bug 1346051
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-4982 (🔍)
GCVE (CVE): GCVE-0-2016-4982
GCVE (VulDB): GCVE-100-103560

Entryinfo

Created: 07/17/2017 20:09
Updated: 03/04/2025 18:07
Changes: 07/17/2017 20:09 (58), 10/26/2019 06:53 (2), 03/04/2025 18:07 (18)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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