Description
Prosody before 0.9.4 does not properly restrict the processing of compressed XML elements, which allows remote attackers to cause a denial of service (resource consumption) via a crafted XMPP stream, aka an "xmppbomb" attack, related to core/portmanager.lua and util/xmppstream.lua.
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 | 0.9.4-1 | — |
| Debian 13 | prosody | 0.9.4-1 | — |
| Debian 12 | prosody | 0.9.4-1 | — |
| Debian 7 | prosody | 0.8.2-4+deb7u1 | DSA-2895-1 |
Advisories 1
- DSA-2895-1 prosody - security update Debian Security (DSA / DLA) · Mar 9, 2026
References
- http://xmpp.org/resources/security-notices/uncontrolled-resource-consumption-with-highly-compressed-xmpp-stanzas/
- http://hg.prosody.im/0.9/rev/a97591d2e1ad
- DSA-2895 vendor-advisory
- 57710 third-party-advisory
- http://hg.prosody.im/0.9/rev/1107d66d2ab2
- http://blog.prosody.im/prosody-0-9-4-released/
- [oss-security] 20140408 Re: (Openfire M-Link Metronome Prosody Tigase) Possible CVE Request: Uncontrolled Resource Consumption with XMPP-Layer Compression mailing-list
- [oss-security] 20140407 Re: Possible CVE Request: Uncontrolled Resource Consumption with XMPP-Layer Compression mailing-list