Vulnerability Monitor

The vendors, products, and vulnerabilities you care about

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.

Published

2021-03-17T06:15:12.107

Last Modified

2024-11-21T03:22:25.583

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 7.8 (HIGH)

CVSSv2 Vector

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

Access Vector: LOCAL
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: PARTIAL
Availability Impact: PARTIAL

Exploitability Score

3.9

Impact Score

6.4

Weaknesses

Type: Primary
CWE-269

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	debian	shadow	4.4	Yes
Operating System	debian	debian_linux	9.0	Yes

References

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=877374 Mailing List, Vendor Advisory ([email protected])
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=914957 Exploit, Mailing List, Vendor Advisory ([email protected])
https://lists.debian.org/debian-lts-announce/2021/03/msg00020.html Mailing List, Vendor Advisory ([email protected])
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=877374 Mailing List, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=914957 Exploit, Mailing List, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://lists.debian.org/debian-lts-announce/2021/03/msg00020.html Mailing List, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)