util-linux/mdev.c in BusyBox before 1.21.0 uses 0777 permissions for parent directories when creating nested directories under /dev/, which
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.
- Published
- Nov 23, 2013
- Updated
- Jun 16, 2026
- EPSS
- 0.6% · 48th percentile
- CWE
- CWE-264
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Report tools
Action score
28
Monitor
Low priority for now.
- CVSS
- 28 / 40 · 7.2 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.6%
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpAffected systems
| Vendor | Product | CPE |
|---|---|---|
| busybox | busybox | cpe:2.3:a:busybox:busybox |
| redhat | enterprise linux | cpe:2.3:o:redhat:enterprise_linux |
| t-mobile | tm-ac1900 | cpe:2.3:o:t-mobile:tm-ac1900 |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- busybox busyboxup to 1.20.2 inclusive
- busybox busybox0.38
- busybox busybox0.39
- busybox busybox0.40
- busybox busybox0.41
- busybox busybox0.42
- busybox busybox0.43
- busybox busybox0.45
- busybox busybox0.46
- busybox busybox0.47
- busybox busybox0.48
- busybox busybox0.49
- busybox busybox0.50
- busybox busybox0.51
- busybox busybox0.52
- busybox busybox0.60.0
- busybox busybox0.60.1
- busybox busybox0.60.2
- busybox busybox0.60.3
- busybox busybox0.60.4
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | busybox | before 1:1.20.0-8 | 1:1.20.0-8 |
| Red Hat:enterprise_linux:6::client | busybox | before 1:1.15.1-20.el6 | 1:1.15.1-20.el6 |
| Red Hat:enterprise_linux:6::client | busybox-petitboot | before 1:1.15.1-20.el6 | 1:1.15.1-20.el6 |
Same product
busybox: all recordsOther highest-scoring records for the same primary product.
- CVE-2018-1000517BusyBox project BusyBox wget version prior to commit 8e2174e9bd836e53c8b9c6e00d1bc6e2a718686e contains a Buffer Overflow vulnerability in Bu49Plan
- CVE-2016-2148Heap-based buffer overflow in the DHCP client (udhcpc) in BusyBox before 1.25.0 allows remote attackers to have unspecified impact via vecto47Plan
- CVE-2022-48174There is a stack overflow vulnerability in ash.c:6030 in busybox before 1.35.40Plan
- CVE-2021-42377An attacker-controlled pointer free in Busybox's hush applet leads to denial of service and possible code execution when processing a crafte40Plan
- CVE-2017-16544In the add_match function in libbb/lineedit.c in BusyBox through 1.27.2, the tab autocomplete feature of the shell, used to get a list of fi37Monitor
- CVE-2022-28391BusyBox through 1.35.0 allows remote attackers to execute arbitrary code if netstat is used to print a DNS PTR record's value to a VT compat36Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| debian:busybox | 1:1.20.0-8 · Debian:12 | Package registry (OSV) |
| red hat:busybox | 1:1.15.1-20.el6 · Red Hat:enterprise_linux:6::client | Package registry (OSV) |
| red hat:busybox-petitboot | 1:1.15.1-20.el6 · Red Hat:enterprise_linux:6::client | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- C · data can be read
- Integrity
- C · data or configuration can be modified
- Availability
- C · the service can be disrupted
- Attack complexity
- Low
- Confidentiality impact
- C
- Integrity impact
- C
- Availability impact
- C
Weakness class (CWE)
CWE-264 · Permissions, Privileges, and Access ControlsCVSS vector
AV:L/AC:L/Au:N/C:C/I:C/A:C
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- bugs.debian.org/cgi-bin/bugreport.cgi?bug=701965
- lists.busybox.net/pipermail/busybox/2013-January/078864.html
- packetstormsecurity.com/files/153278/WAGO-852-Industrial-Managed-Switch-Series-Code-Execution-Hardcoded-Credentials.html
- rhn.redhat.com/errata/RHSA-2013-1732.html
- seclists.org/fulldisclosure/2019/Jun/18
- seclists.org/fulldisclosure/2020/Aug/20
- seclists.org/fulldisclosure/2020/Mar/15
- seclists.org/bugtraq/2019/Jun/14
- support.t-mobile.com/docs/DOC-21994
Vendor advisories and official records. Exploit/PoC links are deliberately left out.