UBUNTU-CVE-2021-40524

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Source
https://ubuntu.com/security/CVE-2021-40524
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-40524.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2021-40524
Upstream
Published
2021-09-05T19:15:00Z
Modified
2025-09-08T16:47:21Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
  • Ubuntu - low
Summary
[none]
Details

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.)

References

Affected packages

Ubuntu:Pro:16.04:LTS / pure-ftpd

Package

Name
pure-ftpd
Purl
pkg:deb/ubuntu/pure-ftpd@1.0.36-3.2+deb8u1build0.16.04.1?arch=source&distro=esm-apps/xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.0.36-3.2
1.0.36-3.2build1
1.0.36-3.2+deb8u1build0.16.04.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.0.36-3.2+deb8u1build0.16.04.1",
            "binary_name": "pure-ftpd"
        },
        {
            "binary_version": "1.0.36-3.2+deb8u1build0.16.04.1",
            "binary_name": "pure-ftpd-common"
        },
        {
            "binary_version": "1.0.36-3.2+deb8u1build0.16.04.1",
            "binary_name": "pure-ftpd-ldap"
        },
        {
            "binary_version": "1.0.36-3.2+deb8u1build0.16.04.1",
            "binary_name": "pure-ftpd-mysql"
        },
        {
            "binary_version": "1.0.36-3.2+deb8u1build0.16.04.1",
            "binary_name": "pure-ftpd-postgresql"
        }
    ]
}

Ubuntu:Pro:18.04:LTS / pure-ftpd

Package

Name
pure-ftpd
Purl
pkg:deb/ubuntu/pure-ftpd@1.0.46-1ubuntu18.04.1?arch=source&distro=esm-apps/bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.0.46-1
1.0.46-1build1
1.0.46-1ubuntu18.04.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.0.46-1ubuntu18.04.1",
            "binary_name": "pure-ftpd"
        },
        {
            "binary_version": "1.0.46-1ubuntu18.04.1",
            "binary_name": "pure-ftpd-common"
        },
        {
            "binary_version": "1.0.46-1ubuntu18.04.1",
            "binary_name": "pure-ftpd-ldap"
        },
        {
            "binary_version": "1.0.46-1ubuntu18.04.1",
            "binary_name": "pure-ftpd-mysql"
        },
        {
            "binary_version": "1.0.46-1ubuntu18.04.1",
            "binary_name": "pure-ftpd-postgresql"
        }
    ]
}

Ubuntu:Pro:20.04:LTS / pure-ftpd

Package

Name
pure-ftpd
Purl
pkg:deb/ubuntu/pure-ftpd@1.0.49-4ubuntu0.1?arch=source&distro=esm-apps/focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.0.47-3build1
1.0.49-1
1.0.49-2
1.0.49-3
1.0.49-4
1.0.49-4ubuntu0.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.0.49-4ubuntu0.1",
            "binary_name": "pure-ftpd"
        },
        {
            "binary_version": "1.0.49-4ubuntu0.1",
            "binary_name": "pure-ftpd-common"
        },
        {
            "binary_version": "1.0.49-4ubuntu0.1",
            "binary_name": "pure-ftpd-ldap"
        },
        {
            "binary_version": "1.0.49-4ubuntu0.1",
            "binary_name": "pure-ftpd-mysql"
        },
        {
            "binary_version": "1.0.49-4ubuntu0.1",
            "binary_name": "pure-ftpd-postgresql"
        }
    ]
}

Ubuntu:22.04:LTS / pure-ftpd

Package

Name
pure-ftpd
Purl
pkg:deb/ubuntu/pure-ftpd@1.0.50-2.1ubuntu0.22.04.1?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.0.49-4.1build1
1.0.50-2
1.0.50-2.1
1.0.50-2.1ubuntu0.22.04.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.0.50-2.1ubuntu0.22.04.1",
            "binary_name": "pure-ftpd"
        },
        {
            "binary_version": "1.0.50-2.1ubuntu0.22.04.1",
            "binary_name": "pure-ftpd-common"
        },
        {
            "binary_version": "1.0.50-2.1ubuntu0.22.04.1",
            "binary_name": "pure-ftpd-ldap"
        },
        {
            "binary_version": "1.0.50-2.1ubuntu0.22.04.1",
            "binary_name": "pure-ftpd-mysql"
        },
        {
            "binary_version": "1.0.50-2.1ubuntu0.22.04.1",
            "binary_name": "pure-ftpd-postgresql"
        }
    ]
}

Ubuntu:24.04:LTS / pure-ftpd

Package

Name
pure-ftpd
Purl
pkg:deb/ubuntu/pure-ftpd@1.0.50-2.2build2?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.0.50-2.1build1
1.0.50-2.1ubuntu1
1.0.50-2.2
1.0.50-2.2build1
1.0.50-2.2build2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.0.50-2.2build2",
            "binary_name": "pure-ftpd"
        },
        {
            "binary_version": "1.0.50-2.2build2",
            "binary_name": "pure-ftpd-common"
        },
        {
            "binary_version": "1.0.50-2.2build2",
            "binary_name": "pure-ftpd-ldap"
        },
        {
            "binary_version": "1.0.50-2.2build2",
            "binary_name": "pure-ftpd-mysql"
        },
        {
            "binary_version": "1.0.50-2.2build2",
            "binary_name": "pure-ftpd-postgresql"
        }
    ]
}

Ubuntu:25.04 / pure-ftpd

Package

Name
pure-ftpd
Purl
pkg:deb/ubuntu/pure-ftpd@1.0.50-2.2build3?arch=source&distro=plucky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.0.50-2.2build2
1.0.50-2.2build3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.0.50-2.2build3",
            "binary_name": "pure-ftpd"
        },
        {
            "binary_version": "1.0.50-2.2build3",
            "binary_name": "pure-ftpd-common"
        },
        {
            "binary_version": "1.0.50-2.2build3",
            "binary_name": "pure-ftpd-ldap"
        },
        {
            "binary_version": "1.0.50-2.2build3",
            "binary_name": "pure-ftpd-mysql"
        },
        {
            "binary_version": "1.0.50-2.2build3",
            "binary_name": "pure-ftpd-postgresql"
        }
    ]
}