An attacker-controlled pointer free in Busybox's hush applet leads to denial of service and possible code execution when processing a crafte
An attacker-controlled pointer free in Busybox's hush applet leads to denial of service and possible code execution when processing a crafted shell command, due to the shell mishandling the &&& string. This may be used for remote code execution under rare conditions of filtered command input.
- Published
- Nov 15, 2021
- Updated
- Jun 17, 2026
- EPSS
- 3.6% · 89th percentile
- CWE
- CWE-590
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Report tools
Action score
40
Plan
Add it to your regular patch cycle.
- CVSS
- 39 / 40 · 9.8 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 1 / 30 · 3.6%
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 |
| fedoraproject | fedora | cpe:2.3:o:fedoraproject:fedora |
| netapp | cloud backup | cpe:2.3:a:netapp:cloud_backup |
| netapp | hci management node | cpe:2.3:a:netapp:hci_management_node |
| netapp | solidfire | cpe:2.3:a:netapp:solidfire |
| netapp | h300s firmware | cpe:2.3:o:netapp:h300s_firmware |
| netapp | h300s | cpe:2.3:h:netapp:h300s |
| netapp | h500s firmware | cpe:2.3:o:netapp:h500s_firmware |
| netapp | h500s | cpe:2.3:h:netapp:h500s |
| netapp | h700s firmware | cpe:2.3:o:netapp:h700s_firmware |
| netapp | h700s | cpe:2.3:h:netapp:h700s |
| netapp | h300e firmware | cpe:2.3:o:netapp:h300e_firmware |
and 7 more
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- busybox busybox1.33.0
- busybox busybox1.33.1
- fedoraproject fedora33
- fedoraproject fedora34
- netapp cloud backupall versions
- netapp h300e firmwareall versions
- netapp h300s firmwareall versions
- netapp h410s firmwareall versions
- netapp h500e firmwareall versions
- netapp h500s firmwareall versions
- netapp h700e firmwareall versions
- netapp h700s firmwareall versions
- netapp hci management nodeall versions
- netapp solidfireall versions
Versions reported by the vendor
Affected version ranges reported by the assigning authority (JFROG). Independent of NVD's CPE analysis and usually ahead of it.
busybox busybox
- unspecified and later · before 1.34.0affected
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Alpine:v3.11 | busybox | before 0 | 0 |
| Debian:12 | busybox | before 1:1.35.0-1 | 1:1.35.0-1 |
| openSUSE:Leap 15.3 | busybox | before 1.34.1-4.9.1 | 1.34.1-4.9.1 |
| openSUSE:Leap 15.3 | virtualbox | before 6.1.34-lp153.2.27.2 | 6.1.34-lp153.2.27.2 |
| openSUSE:Leap 15.3 | virtualbox-kmp | before 6.1.34-lp153.2.27.1 | 6.1.34-lp153.2.27.1 |
| openSUSE:Tumbleweed | busybox | before 1.35.0-1.1 | 1.35.0-1.1 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP3 | busybox | before 1.34.1-4.9.1 | 1.34.1-4.9.1 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP4 | busybox | before 1.35.0-150400.3.3.1 | 1.35.0-150400.3.3.1 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP4 | busybox | before 1.35.0-150400.3.3.1 | 1.35.0-150400.3.3.1 |
| SUSE:OpenStack Cloud 9 | busybox | before 1.35.0-4.3.1 | 1.35.0-4.3.1 |
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-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
- CVE-2018-1000500Busybox contains a Missing SSL certificate validation vulnerability in The "busybox wget" applet that can result in arbitrary code execution33Monitor
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 |
|---|---|---|
| alpine:busybox | 0 · Alpine:v3.11 | Package registry (OSV) |
| debian:busybox | 1:1.35.0-1 · Debian:12 | Package registry (OSV) |
| opensuse:busybox | 1.35.0-150400.3.3.1 · openSUSE:Leap 15.4 | Package registry (OSV) |
| opensuse:virtualbox | 6.1.34-lp153.2.27.2 · openSUSE:Leap 15.3 | Package registry (OSV) |
| opensuse:virtualbox-kmp | 6.1.34-lp153.2.27.1 · openSUSE:Leap 15.3 | Package registry (OSV) |
| suse:busybox | 1.34.1-4.9.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP3 | Package registry (OSV) |
| suse:busybox | 1.35.0-150400.3.3.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP4 | 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
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
CWE-590 · Free of Memory not on the HeapCVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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
- claroty.com/team82/research/unboxing-busybox-14-vulnerabilities-uncovered-by-claroty-jfrog
- jfrog.com/blog/unboxing-busybox-14-new-vulnerabilities-uncovered-by-claroty-and-jfrog/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6T2TURBYYJGBMQTTN2DSOAIQGP7WCPGV/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UQXGOGWBIYWOIVXJVRKHZR34UMEHQBXS/
- security.netapp.com/advisory/ntap-20211223-0002/
Vendor advisories and official records. Exploit/PoC links are deliberately left out.