CVE-2011-0762: The vsf_filename_passes_filter function in ls.c in vsftpd before 2.3.3 allows remote authenticated users to ca

Q: How do I fix CVE-2011-0762?

vsftpd: upgrade to 2.3.3; ubuntu linux: mitigate or apply the listed mitigation; fedora: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2011-0762 being exploited?

CVE-2011-0762 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2011-0762 affect?

CVE-2011-0762 affects vsftpd, ubuntu linux, fedora. Severity is medium (CVSS 4.0). 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 FT

Q: How urgent is CVE-2011-0762?

Priority 49/100. EPSS top 1%: very likely to be exploited; Public exploit reference; On your watchlist

This week

MEDIUM 4.0WATCHLISTUPGRADEMITIGATEMITIGATE

CVE-2011-0762 is a medium-severity flaw (CVSS 4.0) affecting vsftpd, ubuntu linux, fedora. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

EPSS top 1%: very likely to be exploited
Public exploit reference
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	4.0 (Medium)
EPSS exploit chance	73.9% (top 1%)
CISA exploited list	No
Weakness	CWE-400
Published	2011-03-02
Last modified	2026-06-16

Publisher (CNA): CERT/CC · Vendor: canonical · debian · fedoraproject · opensuse · suse · vsftpd project

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2011-03-02 20:00 UTCPublished CVE record published
2026-06-16 23:28 UTCUpdated Record last modified

vsftpd project vsftpd UPGRADE

Affected: < 2.3.3

Fixed in: 2.3.3

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy vsftpd || rpm -q vsftpd || vsftpd --version

2. UPGRADE to 2.3.3 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade vsftpd

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade vsftpd

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

canonical ubuntu linux MITIGATE

Affected: 6.06 · 8.04 · 9.10 · 10.04 · 10.10

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.06

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

fedoraproject fedora MITIGATE

Affected: 13 · 14 · 15

Fixed in: no fixed release known

Safe to downgrade to: a release before 13

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

debian debian linux MITIGATE

Affected: 5.0 · 6.0 · 7.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 5.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

opensuse opensuse MITIGATE

Affected: 11.2 · 11.3 · 11.4

Fixed in: no fixed release known

Safe to downgrade to: a release before 11.2

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

suse linux enterprise server MITIGATE

Affected: 9 · 10 sp3 · 10 sp4 · 11 sp1

Fixed in: no fixed release known

Safe to downgrade to: a release before 9

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: vsftpd 2.3.2 - Denial of Service
Metasploit: VSFTPD 2.3.2 and Earlier STAT Denial of Service
Nuclei scan template: vsftpd < 2.3.3 - DoS

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2011-0762?

vsftpd: upgrade to 2.3.3; ubuntu linux: mitigate or apply the listed mitigation; fedora: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2011-0762 being exploited?

CVE-2011-0762 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2011-0762 affect?

CVE-2011-0762 affects vsftpd, ubuntu linux, fedora. Severity is medium (CVSS 4.0). 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 FT

How urgent is CVE-2011-0762?

Priority 49/100. EPSS top 1%: very likely to be exploited; Public exploit reference; On your watchlist

Software pages

Ubuntu vulnerabilities · Debian vulnerabilities · vsftpd vulnerabilities

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References

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