CVE-2017-20002 Detail

Current Description

The Debian shadow package before 1:4.5-1 for Shadow incorrectly lists pts/0 and pts/1 as physical terminals in /etc/securetty. This allows local users to login as password-less users even if they are connected by non-physical means such as SSH (hence bypassing PAM's nullok_secure configuration). This notably affects environments such as virtual machines automatically generated with a default blank root password, allowing all local users to escalate privileges.


View Analysis Description

Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
Base Score:  7.8 HIGH
Vector:  CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H


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Note: NVD Analysts have published a CVSS score for this CVE based on publicly available information at the time of analysis. The CNA has not provided a score within the CVE List.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=877374 Mailing List  Vendor Advisory 
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=914957 Exploit  Mailing List  Vendor Advisory 
https://lists.debian.org/debian-lts-announce/2021/03/msg00020.html Mailing List  Vendor Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-269 Improper Privilege Management cwe source acceptance level NIST  

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Change History

4 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2017-20002
NVD Published Date:
03/17/2021
NVD Last Modified:
06/07/2021
Source:
MITRE