high7.8
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.
Impact
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.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Debian | Shadow | Version 4.4 |
| Debian | Debian Linux | Version 9.0 |
Weakness classification
References
- NVD record
- CVE.org record
- 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