CVE-2016-0756 : The generate_dialback function in the mod_dialback module in Prosody before 0.9.

The generate_dialback function in the mod_dialback module in Prosody before 0.9.10 does not properly separate fields when generating dialback keys, which allows remote attackers to spoof XMPP network domains via a crafted stream id and domain name that is included in the target domain as a suffix.

Published 2016-01-29 20:59:07

Updated 2016-12-06 03:05:44

Source Red Hat, Inc.

View at NVD, CVE.org

Vulnerability category: Input validation

Products affected by CVE-2016-0756

Prosody » Prosody
Versions up to, including, (<=) 0.9.9
cpe:2.3:a:prosody:prosody:*:*:*:*:*:*:*:*
Matching versions

Exploit prediction scoring system (EPSS) score for CVE-2016-0756

EPSS FAQ

0.77%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 79 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2016-0756

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
5.0	MEDIUM	AV:N/AC:L/Au:N/C:N/I:P/A:N	10.0	2.9	NIST
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: None Integrity Impact: Partial Availability Impact: None
5.3	MEDIUM	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N	3.9	1.4	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: None Integrity: Low Availability: None

CWE ids for CVE-2016-0756

CWE-20 Improper Input Validation

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2016-0756

http://www.debian.org/security/2016/dsa-3463

Debian -- Security Information -- DSA-3463-1 prosody
http://www.openwall.com/lists/oss-security/2016/01/27/10

oss-security - CVE-2016-0756: Prosody XMPP server: insecure dialback key generation/validation algorithm
https://prosody.im/issues/issue/596

#596 Dialback key generation in 0.9 allows servers to impersonate to suffices (closed) - Prosody IM Issue Tracker
http://lists.fedoraproject.org/pipermail/package-announce/2016-February/176914.html

[SECURITY] Fedora 23 Update: prosody-0.9.10-1.fc23
http://blog.prosody.im/prosody-0-9-10-released/

Prosody 0.9.10 released | Prosodical Thoughts
Patch;Vendor Advisory
https://prosody.im/security/advisory_20160127/

Prosody security advisory 2016/01/08 - 1
Vendor Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2016-February/176796.html

[SECURITY] Fedora 22 Update: prosody-0.9.10-1.fc22
http://www.securityfocus.com/bid/82241

Prosody XMPP Server CVE-2016-0756 Security Bypass Vulnerability

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Vulnerability Details : CVE-2016-0756

Products affected by CVE-2016-0756

Exploit prediction scoring system (EPSS) score for CVE-2016-0756

CVSS scores for CVE-2016-0756

CWE ids for CVE-2016-0756

References for CVE-2016-0756