CVE-2021-40524

Published Sep 5, 2021 CVSS 3.1 · 7.5 High EPSS 4.3% KEV · Not listed
Description
In Pure-FTPd before 1.0.50, an incorrect max_filesize quota mechanism in the server allows attackers to upload files of unbounded size, which may lead to denial of service or a server hang. This occurs because a certain greater-than-zero test does not anticipate an initial -1 value. (Versions 1.0.23 through 1.0.49 are affected.)

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

Source ID Title
Debian DLA Debian DLA DLA-4360-1 pure-ftpd security update
EUVD EUVD EUVD-2021-27700 In Pure-FTPd before 1.0.50, an incorrect max_filesize quota mechanism in the server allows attackers to upload files of unbounded size, which may lead to denial of service or a server hang. This occurs because a certain greater-than-zero test does not anticipate an initial -1 value. (Versions 1.0.23 through 1.0.49 are affected.)
Weaknesses

Sources

Status
PUBLISHED
Assigner
mitre
Published
Updated
Nov 4, 2025, 12:12 AM
Reserved
Sep 5, 2021, 12:00 AM
Status
Modified
Published
Sep 5, 2021, 7:15 PM
Modified
Jun 17, 2026, 4:07 AM