Public exploit available
Public proof-of-concept or exploit code exists (ExploitDB / Metasploit / Nuclei).

CVE-2021-40524

CWE-434 — Unrestricted File Upload6 documents6 sources
Severity
7.5HIGH
EPSS
30.2%
top 3.32%
CISA KEV
Not in KEV
Exploit
PoC available
Public exploit / PoC exists
Affected products
1
Pureftpd Pure-ftpd
Timeline
PublishedSep 5
Latest updateMay 24

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.)

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitability: 3.9 | Impact: 3.6

Affected Packages2 packages

▶NVDpureftpd/pure-ftpd1.0.23 — 1.0.50
▶Debianpure-ftpd< 1.0.49-4.1+deb11u1+2

Patches

Patch: github.com ↗Patch: github.com ↗Patch: github.com ↗

🔴Vulnerability Details

3
GHSA
GHSA-p53v-96v3-p5jg: In Pure-FTPd 1↗2022-05-24
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OSV
CVE-2021-40524: In Pure-FTPd before 1↗2021-09-05
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CVEList
CVE-2021-40524: In Pure-FTPd before 1↗2021-09-05
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💥Exploits & PoCs

1
Nuclei
Pure-FTPd 1.0.23 < 1.0.50 - Arbitrary File Upload
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📋Vendor Advisories

1
Debian
CVE-2021-40524: pure-ftpd - In Pure-FTPd before 1.0.50, an incorrect max_filesize quota mechanism in the ser...↗2021
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