Security restrictions bypass in Prosody

1) Security restrictions bypass

EUVDB-ID: #VU13181

Risk: Low

CVSSv3.1: 5.5 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-10847

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote authenticated attacker to bypass security restrictions on the target system.

The weakness exists due to insufficient validation of client-provided parameters during XMPP stream restarts. A remote attacker can supply specially crafted parameters, override the realm associated with the session, bypass security restrictions and impersonate a legitimate user.

Mitigation

The vulnerability is addressed in the following versions: 0.9.14, 0.10.2.

Vulnerable software versions

Prosody: 0.9.10 - 0.10.1

External links

http://prosody.im/security/advisory_20180531/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.