Saturday, March 20, 2021

Debian: CVE-2017-20002: shadow -- security update

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.
Solution(s)
  • debian-upgrade-shadow


  • References
  • https://attackerkb.com/topics/cve-2017-20002
  • CVE - 2017-20002
  • DLA-2596-1




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