CVE-2018-7169
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2018-7169
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-7169.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2018-7169
- Related
- Published
- 2018-02-15T20:29:00Z
- Modified
- 2025-01-14T07:36:59.738915Z
- Severity
-
- 5.3 (Medium) CVSS_V3 - CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N CVSS Calculator
- Summary
- [none]
- Details
-
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.
- References
Affected packages
Debian:11 / shadow
Package
- Name
- shadow
- Purl
- pkg:deb/debian/shadow?arch=source
Debian:12 / shadow
Package
- Name
- shadow
- Purl
- pkg:deb/debian/shadow?arch=source
Debian:13 / shadow
Package
- Name
- shadow
- Purl
- pkg:deb/debian/shadow?arch=source