Vulnerability Details 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 18.9%
CVSS Severity
CVSS v3 Score 7.8
CVSS v2 Score 4.6
References
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=877374
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=914957
- https://lists.debian.org/debian-lts-announce/2021/03/msg00020.html
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=877374
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=914957
- https://lists.debian.org/debian-lts-announce/2021/03/msg00020.html
Products affected by CVE-2017-20002
-
cpe:2.3:a:debian:shadow:4.4
-
cpe:2.3:o:debian:debian_linux:9.0