CVE-2017-20002

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.

CVSS v3.0 7.8 HIGH
CVSS v2.0 4.6 MEDIUM

7.8^/10

CVSS v3.0 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

4.6^/10

CVSS v2.0 : MEDIUM

Vector : AV:L/AC:L/Au:N/C:P/I:P/A:P

Exploitability : 3.9 / Impact : 6.4

Access Vector LOCAL

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

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

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Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:debian:shadow:4.4:::::::*
	cpe:2.3:o:debian:debian_linux:9.0:::::::*

Information

Published : 2021-03-16 23:15

Updated : 2021-06-07 07:58

NVD link : CVE-2017-20002

Mitre link : CVE-2017-20002

JSON object : View

CWE

CWE-269

Improper Privilege Management

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Products Affected

debian

debian_linux
shadow

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