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Debian dla-4360 : pure-ftpd - security update

high Nessus Plugin ID 272225

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Synopsis

The remote Debian host is missing a security-related update.

Description

The remote Debian 11 host has packages installed that are affected by a vulnerability as referenced in the dla-4360 advisory.

 ------------------------------------------------------------------------- Debian LTS Advisory DLA-4360-1 [email protected] https://www.debian.org/lts/security/ Santiago Ruano Rincn November 03, 2025 https://wiki.debian.org/LTS
 -------------------------------------------------------------------------

 Package : pure-ftpd Version : 1.0.49-4.1+deb11u1 CVE ID : CVE-2021-40524 Debian Bug : 993810

 It was discovered that pure-ftpd, a secure and efficient FTP server, incorrectly verified the maximum file size in the quota mechanism, allowing adversaries to upload files of unbounded size. This may lead to denial of service or a server hang.

 For Debian 11 bullseye, this problem has been fixed in version 1.0.49-4.1+deb11u1.

 We recommend that you upgrade your pure-ftpd packages.

 For the detailed security status of pure-ftpd please refer to its security tracker page at:
 https://security-tracker.debian.org/tracker/pure-ftpd

 Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS Attachment:
 signature.asc Description: PGP signature

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Upgrade the pure-ftpd packages.

See Also

https://security-tracker.debian.org/tracker/source-package/pure-ftpd

https://security-tracker.debian.org/tracker/CVE-2021-40524

https://packages.debian.org/source/bullseye/pure-ftpd

Plugin Details

Severity: High

ID: 272225

File Name: debian_DLA-4360.nasl

Version: 1.1

Type: local

Agent: unix

Published: 11/3/2025

Updated: 11/3/2025

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.9

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P

CVSS Score Source: CVE-2021-40524

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.7

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:pure-ftpd, p-cpe:/a:debian:debian_linux:pure-ftpd-mysql, cpe:/o:debian:debian_linux:11.0, p-cpe:/a:debian:debian_linux:pure-ftpd-ldap, p-cpe:/a:debian:debian_linux:pure-ftpd-common, p-cpe:/a:debian:debian_linux:pure-ftpd-postgresql

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 11/3/2025

Vulnerability Publication Date: 9/5/2021

Reference Information

CVE: CVE-2021-40524