CVE-2021-32918

Published: May 13, 2021Modified: Jun 17, 2026

7.5

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitability: 3.9 / Impact: 3.6

Source: NVD

Description

An issue was discovered in Prosody before 0.11.9. Default settings are susceptible to remote unauthenticated denial-of-service (DoS) attacks via memory exhaustion when running under Lua 5.2 or Lua 5.3.

Affected (5)

Products: Prosody: Prosody · Debian: Debian Linux · Fedoraproject: Fedora

1 product

1 product

1 product

Configuration A

1 vulnerable · 2 platform

Vulnerable Software	Affected Versions
Prosody Prosody	Before 0.11.9

Running on/with	Platform Versions
Lua Lua	Version 5.2.0
Lua Lua	Version 5.3.0

Configuration B

1 vulnerable

Vulnerable Software	Affected Versions
Debian Debian Linux	Version 10.0

Configuration C

3 vulnerable

Vulnerable Software	Affected Versions
Fedoraproject Fedora	Version 32
Fedoraproject Fedora	Version 33
Fedoraproject Fedora	Version 34

Related CWEs

CWE-400

Uncontrolled Resource Consumption

The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources.

References (16)

http://www.openwall.com/lists/oss-security/2021/05/13/1

Source: cve@mitre.org

Mailing ListThird Party Advisory

http://www.openwall.com/lists/oss-security/2021/05/14/2

Source: cve@mitre.org

Mailing ListMitigationThird Party Advisory

https://blog.prosody.im/prosody-0.11.9-released/

Source: cve@mitre.org

Release NotesVendor Advisory

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6MFFBZWXKPZEVZNQSVJNCUE7WRF3T7DG/

Source: cve@mitre.org

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GUN63AHEWB2WRROJHU3BVJRWLONCT2B7/

Source: cve@mitre.org

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LWJ2DG2DFJOEFEWOUN26IMYYWGSA2ZEE/

Source: cve@mitre.org

https://security.gentoo.org/glsa/202105-15

Source: cve@mitre.org

Third Party Advisory

https://www.debian.org/security/2021/dsa-4916

Source: cve@mitre.org

Third Party Advisory

http://www.openwall.com/lists/oss-security/2021/05/13/1