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.)
Published: 2021-09-05
Score: 7.5 High
EPSS: 30.2% Moderate
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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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.)
History

Tue, 04 Nov 2025 01:30:00 +0000

Type Values Removed Values Added
References

Subscriptions

Pureftpd Pure-ftpd
cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2025-11-04T00:12:03.856Z

Reserved: 2021-09-05T00:00:00.000Z

Link: CVE-2021-40524

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2021-09-05T19:15:15.080

Modified: 2025-11-04T01:15:31.910

Link: CVE-2021-40524

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses