CVE-2018-7169
CVE-2018-7169
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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.
CVSS 5.3 · Medium · EPSS 1.6% · Fix available
- Published
- Updated
Stack: system
Affected products and versions
n/a
- Versions
- n/a: Affected
No fix published
shadow Debian:12
- Affected ranges
- ECOSYSTEM: < 1:4.7-1
Update to 1:4.7-1
shadow Debian:13
- Affected ranges
- ECOSYSTEM: < 1:4.7-1
Update to 1:4.7-1
shadow Debian:14
- Affected ranges
- ECOSYSTEM: < 1:4.7-1
Update to 1:4.7-1
shadow Ubuntu:Pro:14.04:LTS
- Versions
- 1:4.1.5.1-1ubuntu6
- 1:4.1.5.1-1ubuntu7
- 1:4.1.5.1-1ubuntu8
- 1:4.1.5.1-1ubuntu9
- 1:4.1.5.1-1ubuntu9.1
- 1:4.1.5.1-1ubuntu9.2
- 1:4.1.5.1-1ubuntu9.4
- 1:4.1.5.1-1ubuntu9.5
- Affected ranges
- ECOSYSTEM: < 1:4.1.5.1-1ubuntu9.5+esm1
Update to 1:4.1.5.1-1ubuntu9.5+esm1
shadow Ubuntu:Pro:16.04:LTS
- Versions
- 1:4.1.5.1-1.1ubuntu7
- 1:4.2-3.1ubuntu1
- 1:4.2-3.1ubuntu2
- 1:4.2-3.1ubuntu3
- 1:4.2-3.1ubuntu4
- 1:4.2-3.1ubuntu5
- 1:4.2-3.1ubuntu5.2
- 1:4.2-3.1ubuntu5.3
- 1:4.2-3.1ubuntu5.4
- Affected ranges
- ECOSYSTEM: < 1:4.2-3.1ubuntu5.5+esm1
Update to 1:4.2-3.1ubuntu5.5+esm1
shadow Ubuntu:18.04:LTS
- Versions
- 1:4.2-3.2ubuntu4
- 1:4.5-1ubuntu1
- 1:4.5-1ubuntu2
- Affected ranges
- ECOSYSTEM: < 1:4.5-1ubuntu2.2
Update to 1:4.5-1ubuntu2.2