Description
util-linux/mdev.c in BusyBox before 1.21.0 uses 0777 permissions for parent directories when creating nested directories under /dev/, which allows local users to have unknown impact and attack vectors.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | busybox | 1:1.20.0-8 | — |
| Debian 13 | busybox | 1:1.20.0-8 | — |
| Debian 12 | busybox | 1:1.20.0-8 | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 6 | busybox +1 | 1:1.15.1-20.el6 | RHSA-2013:1732 |
Advisories 2
- RHSA-2013:1732 Red Hat Security Advisory: busybox security and bug fix update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- VDE-2019-013 WAGO: Multiple Vulnerabilities in industrial managed switches CERT@VDE · Jun 12, 2019
References
- https://support.t-mobile.com/docs/DOC-21994
- http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=701965
- RHSA-2013:1732 vendor-advisory
- [busybox] 20130722 1.21.0 is released mailing-list
- http://git.busybox.net/busybox/commit/?id=4609f477c7e043a4f6147dfe6e86b775da2ef784
- 20190612 SEC Consult SA-20190612-0 :: Multiple vulnerabilities in WAGO 852 Industrial Managed Switch Series mailing-list
- 20190613 SEC Consult SA-20190612-0 :: Multiple vulnerabilities in WAGO 852 Industrial Managed Switch Series mailing-list
- http://packetstormsecurity.com/files/153278/WAGO-852-Industrial-Managed-Switch-Series-Code-Execution-Hardcoded-Credentials.html
- 20200313 SEC Consult SA-20200312-0 :: Authenticated Command Injection in Phoenix Contact TC Router & TC Cloud Client mailing-list
- 20200827 SEC Consult SA-20200827-0 :: Multiple Vulnerabilities in ZTE mobile Hotspot MS910S mailing-list