Main Vulnerability Database Vulnerabilities #VU59655

XML Entity Expansion in Prosody - CVE-2022-0217

Published: January 17, 2022 / Updated: January 19, 2022

Vulnerability identifier: #VU59655

CSH Severity: Medium

CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2022-0217

CWE-ID: CWE-776

Exploitation vector: Remote access

Exploit availability: Public exploit is available

Vulnerability details

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to improper validation of untrusted XML data. A remote attacker can send specially crafted data to the affected server and perform a denial of service (DoS) attack.

Affected software

Prosody
prosody (Debian package)
prosody
Fedora

How to mitigate CVE-2022-0217

Install updates from vendor's website.

Prosody - update to 0.11.12
prosody (Debian package) - addressed in versions 0.11.2-1+deb10u3, 0.11.9-2+deb11u1
prosody - addressed in versions 0.11.12-1.el7, 0.11.12-1.el8, 0.11.12-1.el9, 0.11.12-1.fc34, 0.11.12-1.fc35

Links to Public Exploits and PoC-codes

Exploit #7249 - Prosody XMPP server advisory 2022-01-13 (Remote Unauthenticated Denial of Service) (CVE-2022-0217) (January 19, 2022)

External References

https://prosody.im/security/advisory_20220113/