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

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