#VU13181 Security restrictions bypass in Prosody - CVE-2018-10847

Vulnerability identifier: #VU13181

Vulnerability risk: Low

CVSSv4.0: 1.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-10847

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Prosody
Server applications / Mail servers

Vendor: Prosody

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

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External links
https://prosody.im/security/advisory_20180531/

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Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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