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.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | prosody | 0.11.9-1 | — |
| Debian 13 | prosody | 0.11.9-1 | — |
| Debian 12 | prosody | 0.11.9-1 | — |
| Debian 10 | prosody | 0.11.2-1+deb10u1 | DSA-4916-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | prosody | No fix yet | — |
| Ubuntu 20.04 LTS | prosody | No fix yet | — |
| Ubuntu 16.04 LTS | prosody | No fix yet | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 18.04 LTS | prosody | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SUSE Package Hub 15 SP2 | prosody | 0.11.9-bp152.2.3.1 | openSUSE-SU-2021:0751-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | prosody | 0.11.10-1.2 | openSUSE-SU-2024:11197-1 |
| openSUSE Leap 15.2 | prosody | 0.11.9-lp152.2.3.1 | openSUSE-SU-2021:0728-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | prosody | 0.11.9-r0 | — |
| Alpine v3.23 | prosody | 0.11.9-r0 | — |
| Alpine v3.22 | prosody | 0.11.9-r0 | — |
| Alpine v3.21 | prosody | 0.11.9-r0 | — |
| Alpine v3.20 | prosody | 0.11.9-r0 | — |
Show 8 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | prosody | 0.11.9-r0 | — |
| Alpine v3.18 | prosody | 0.11.9-r0 | — |
| Alpine v3.17 | prosody | 0.11.9-r0 | — |
| Alpine v3.16 | prosody | 0.11.9-r0 | — |
| Alpine v3.15 | prosody | 0.11.9-r0 | — |
| Alpine v3.14 | prosody | 0.11.9-r0 | — |
| Alpine v3.13 | prosody | 0.11.9-r0 | — |
| Alpine v3.12 | prosody | 0.11.9-r0 | — |
Advisories 4
- DSA-4916-1 prosody - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2021:0728-1 Security update for prosody SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:0751-1 Security update for prosody SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:11197-1 prosody-0.11.10-1.2 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
References
- https://blog.prosody.im/prosody-0.11.9-released/
- [oss-security] 20210513 Prosody XMPP server advisory 2021-05-12 (multiple vulnerabilities) mailing-list
- [oss-security] 20210514 Re: Prosody XMPP server advisory 2021-05-12 (multiple vulnerabilities) mailing-list
- DSA-4916 vendor-advisory
- FEDORA-2021-b5d8c6d086 vendor-advisory
- FEDORA-2021-a33f6e36e1 vendor-advisory
- FEDORA-2021-498be8f560 vendor-advisory
- https://security.gentoo.org/glsa/202105-15