Incorrect Permission Assignment for Critical Resource Affecting shadow package, versions *


low
  • Attack Complexity

    Low

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • snyk-id

    SNYK-DEBIAN10-SHADOW-306230

  • published

    15 Feb 2018

  • disclosed

    15 Feb 2018

How to fix?

There is no fixed version for Debian:10 shadow.

NVD Description

Note: Versions mentioned in the description apply to the upstream shadow package.

An issue was discovered in shadow 4.5. newgidmap (in shadow-utils) is setuid and allows an unprivileged user to be placed in a user namespace where setgroups(2) is permitted. This allows an attacker to remove themselves from a supplementary group, which may allow access to certain filesystem paths if the administrator has used "group blacklisting" (e.g., chmod g-rwx) to restrict access to paths. This flaw effectively reverts a security feature in the kernel (in particular, the /proc/self/setgroups knob) to prevent this sort of privilege escalation.