CVE-2017-20002
High
Description
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.
SeverityHigh
CVSS7.8
Exploit probability—
Product
Debian Shadow
PublishedMar 17, 2021
First seenMar 17, 2021
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| debian shadow | 4.4 | — |
| debian debian_linux | 9.0 | — |
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