CVE-2021-32918
Publication date 13 May 2021
Last updated 26 August 2025
Ubuntu priority
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.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| prosody | 25.10 questing |
Not affected
|
| 24.04 LTS noble |
Not affected
|
|
| 22.04 LTS jammy |
Vulnerable
|
|
| 20.04 LTS focal |
Vulnerable
|
|
| 18.04 LTS bionic |
Vulnerable
|
|
| 16.04 LTS xenial |
Needs evaluation
|
|
| 14.04 LTS trusty | Not in release |
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score |
7.5 · High
|
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | None |
| Availability impact | High |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
References
Other references
- https://www.openwall.com/lists/oss-security/2021/05/13/1
- https://prosody.im/security/advisory_20210512.txt
- https://hg.prosody.im/trunk/rev/db8e41eb6eff
- https://hg.prosody.im/trunk/rev/b0d8920ed5e5
- https://hg.prosody.im/trunk/rev/929de6ade6b6
- https://hg.prosody.im/trunk/rev/63fd4c8465fb
- https://hg.prosody.im/trunk/rev/1937b3c3efb5
- https://hg.prosody.im/trunk/rev/3413fea9e6db
- https://blog.prosody.im/prosody-0.11.9-released/
- https://www.cve.org/CVERecord?id=CVE-2021-32918