CVE-2017-20002

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. 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.

7.8 /10

CVSS v3 : HIGH

V3 Legend

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

V2 Legend

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=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
Configurations

Configuration 1 (hide)

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

07 Jun 2021, 14:58

Type Values Removed Values Added
CPE cpe:2.3:a:debian:shadow:*:*:*:*:*:*:*:* cpe:2.3:a:debian:shadow:4.4:*:*:*:*:*:*:*

23 Mar 2021, 18:49

Type Values Removed Values Added
References (MISC) https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=914957 - (MISC) https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=914957 - Exploit, Mailing List, Vendor Advisory
References (MLIST) https://lists.debian.org/debian-lts-announce/2021/03/msg00020.html - (MLIST) https://lists.debian.org/debian-lts-announce/2021/03/msg00020.html - Mailing List, Vendor Advisory
References (MISC) https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=877374 - (MISC) https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=877374 - Mailing List, Vendor Advisory
CWE CWE-269
CPE cpe:2.3:a:debian:shadow:*:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
CVSS v2 : unknown
v3 : unknown 		v2 : 4.6
v3 : 7.8

18 Mar 2021, 04:15

Type Values Removed Values Added
Summary The Debian shadow package before 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. 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.

17 Mar 2021, 15:15

Type Values Removed Values Added
References
  • (MLIST) https://lists.debian.org/debian-lts-announce/2021/03/msg00020.html -

17 Mar 2021, 06:15

Type Values Removed Values Added
New CVE
Information

Published : 2021-03-17 06:15

Updated : 2023-12-10 13:41

NVD link : CVE-2017-20002

Mitre link : CVE-2017-20002

CVE.ORG link : CVE-2017-20002

JSON object : View

Products Affected

debian

  • debian_linux
  • shadow
CWE
CWE-269

Improper Privilege Management