The vsf_filename_passes_filter function in ls.c in vsftpd before 2.3.3 allows remote authenticated users to cause a denial of service (CPU c
The vsf_filename_passes_filter function in ls.c in vsftpd before 2.3.3 allows remote authenticated users to cause a denial of service (CPU consumption and process slot exhaustion) via crafted glob expressions in STAT commands in multiple FTP sessions, a different vulnerability than CVE-2010-2632.
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 help- Published
- Mar 2, 2011
- Updated
- Jun 16, 2026
- EPSS
- 73.9% · 99th percentile
- CWE
- CWE-400
Sign in to follow · You’ll be notified if a followed record enters KEV, gets an exploit or is updated.
Report tools
Action score
38
Monitor
Low priority for now.
- CVSS
- 16 / 40 · 4.0 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 22 / 30 · 73.9%
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| vsftpd project | vsftpd | cpe:2.3:a:vsftpd_project:vsftpd |
| canonical | ubuntu linux | cpe:2.3:o:canonical:ubuntu_linux |
| fedoraproject | fedora | cpe:2.3:o:fedoraproject:fedora |
| debian | debian linux | cpe:2.3:o:debian:debian_linux |
| opensuse | opensuse | cpe:2.3:o:opensuse:opensuse |
| suse | linux enterprise server | cpe:2.3:o:suse:linux_enterprise_server |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- canonical ubuntu linux10.04
- canonical ubuntu linux10.10
- canonical ubuntu linux6.06
- canonical ubuntu linux8.04
- canonical ubuntu linux9.10
- debian debian linux5.0
- debian debian linux6.0
- debian debian linux7.0
- fedoraproject fedora13
- fedoraproject fedora14
- fedoraproject fedora15
- opensuse opensuse11.2
- opensuse opensuse11.3
- opensuse opensuse11.4
- suse linux enterprise server10
- suse linux enterprise server11
- suse linux enterprise server9
- vsftpd project vsftpdbefore 2.3.3
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | vsftpd | before 2.3.4-1 | 2.3.4-1 |
| Debian:5.0 | vsftpd | before 2.0.7-1+lenny1 | 2.0.7-1+lenny1 |
| Debian:6.0 | vsftpd | before 2.3.2-3+squeeze2 | 2.3.2-3+squeeze2 |
| Red Hat:enterprise_linux:4::as | vsftpd | before 0:2.0.1-9.el4 | 0:2.0.1-9.el4 |
| Red Hat:enterprise_linux:4::as | vsftpd-debuginfo | before 0:2.0.1-9.el4 | 0:2.0.1-9.el4 |
| Red Hat:enterprise_linux:5::server | vsftpd | before 0:2.0.5-16.el5_6.1 | 0:2.0.5-16.el5_6.1 |
| Red Hat:enterprise_linux:5::server | vsftpd-debuginfo | before 0:2.0.5-16.el5_6.1 | 0:2.0.5-16.el5_6.1 |
| Red Hat:enterprise_linux:6::server | vsftpd | before 0:2.2.2-6.el6_0.1 | 0:2.2.2-6.el6_0.1 |
| Red Hat:enterprise_linux:6::server | vsftpd-debuginfo | before 0:2.2.2-6.el6_0.1 | 0:2.2.2-6.el6_0.1 |
Same product
vsftpd project: all recordsOther highest-scoring records for the same primary product.
- CVE-2011-2523vsftpd 2.3.4 downloaded between 20110630 and 20110703 contains a backdoor which opens a shell on port 6200/tcp.68This week
- CVE-2021-30047VSFTPD 3.0.3 allows attackers to cause a denial of service due to limited number of connections allowed.31Monitor
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:vsftpd | 2.3.4-1 · Debian:12 | Package registry (OSV) |
| red hat:vsftpd | 0:2.0.1-9.el4 · Red Hat:enterprise_linux:4::as | Package registry (OSV) |
| red hat:vsftpd-debuginfo | 0:2.0.1-9.el4 · Red Hat:enterprise_linux:4::as | Package registry (OSV) |
Exploit status
Weaponized
A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.
Evidence
- Metasploit module ×1
- Exploit-DB entry ×1
- Nuclei detection template ×1
- Proof-of-concept repository on GitHub ×1
Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.
| Source | Kind | Date |
|---|---|---|
| Exploit-DB entry | dos | 2011-03-02 |
| Metasploit module | auxiliary/dos/ftp/vsftpd_232VSFTPD 2.3.2 and Earlier STAT Denial of Serviceauxiliary | 2011-02-03 |
| Nuclei detection template | Nuclei template CVE-2011-0762 | — |
| Proof-of-concept repository on GitHub | stars:0 | 2025-05-19 |
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.
- Metasploit-28 d
- First PoC-1 d
- Published
- TodaySep 30, 2026+5691 d
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
- none
- Integrity
- none
- Availability
- P · the service can be disrupted
- Attack complexity
- Low
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- P
Weakness class (CWE)
CWE-400 · Uncontrolled Resource ConsumptionCVSS vector
AV:N/AC:L/Au:S/C:N/I:N/A:P
nvd-primary
Root cause
Code that parses nested structures sets no depth or size limit. A small input can turn into a disproportionate processing load.
The bug in code
The whole CWE-400 classA representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.
Vulnerable
function expand(node) { return node.children.map(expand);}Fixed
const MAX_DEPTH = 32;function expand(node, depth = 0) { if (depth > MAX_DEPTH) throw new Error("too deep"); return node.children.map((c) => expand(c, depth + 1));}Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- ftp://vsftpd.beasts.org/users/cevans/untar/vsftpd-2.3.4/Changelog
- bugs.debian.org/cgi-bin/bugreport.cgi?bug=622741
- cxib.net/stuff/vspoc232.c
- jvn.jp/en/jp/JVN37417423/index.html
- lists.fedoraproject.org/pipermail/package-announce/2011-March/055881.html
- lists.fedoraproject.org/pipermail/package-announce/2011-March/055882.html
- lists.fedoraproject.org/pipermail/package-announce/2011-March/055957.html
- lists.opensuse.org/opensuse-security-announce/2011-05/msg00005.html
- marc.info/?l=bugtraq&m=133226187115472&w=2
- www.debian.org/security/2011/dsa-2305
- www.kb.cert.org/vuls/id/590604
- www.mandriva.com/security/advisories?name=MDVSA-2011:049
- www.redhat.com/support/errata/RHSA-2011-0337.html
- www.securityfocus.com/archive/1/516748/100/0/threaded
- www.securitytracker.com/id?1025186
- www.ubuntu.com/usn/USN-1098-1
- www.vupen.com/english/advisories/2011/0547
- www.vupen.com/english/advisories/2011/0639
- www.vupen.com/english/advisories/2011/0668
- www.vupen.com/english/advisories/2011/0713
Vendor advisories and official records. Exploit/PoC links are deliberately left out.