VDB-171337 · CVE-2017-20002 · GCVE-0-2017-20002

shadow up to 4.5 on Debian Physical Terminal /etc/securetty access control

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.3	$0-$5k	0.00

Summaryinfo

A vulnerability was found in shadow up to 4.5 on Debian. It has been classified as critical. Affected by this issue is some unknown functionality of the file /etc/securetty of the component Physical Terminal Handler. This manipulation causes access control. This vulnerability is tracked as CVE-2017-20002. The attack is restricted to local execution. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability has been found in shadow up to 4.5 on Debian and classified as critical. Affected by this vulnerability is an unknown code block of the file /etc/securetty of the component Physical Terminal Handler. The manipulation with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. As an impact it is known to affect confidentiality, integrity, and availability.

The weakness was disclosed 03/17/2021. The advisory is shared at bugs.debian.org. This vulnerability is known as CVE-2017-20002. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1068 for this issue.

Upgrading to version 4.5-1 eliminates this vulnerability.

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Productinfo

Name

shadow

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.4

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: shadow 4.5-1

Timelineinfo

03/17/2021 🔍
03/17/2021 +0 days 🔍
03/17/2021 +0 days 🔍
04/02/2021 +15 days 🔍

Sourcesinfo

Advisory: bugs.debian.org
Status: Confirmed

CVE: CVE-2017-20002 (🔍)
GCVE (CVE): GCVE-0-2017-20002
GCVE (VulDB): GCVE-100-171337

Entryinfo

Created: 03/17/2021 20:49
Updated: 04/02/2021 00:53
Changes: 03/17/2021 20:49 (39), 04/02/2021 00:47 (5), 04/02/2021 00:53 (18)
Complete: 🔍
Cache ID: 216::103