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Zimbra Collaboration Cross Site Scripting

Zimbra Collaboration Cross Site Scripting
Posted Feb 2, 2019
Authored by Issam Rabhi

Zimbra Collaboration versions prior to 8.8.11 suffer from multiple cross site scripting vulnerabilities.

tags | exploit, vulnerability, xss
advisories | CVE-2018-14013
MD5 | 7c3e5bfa4d1dacfb8dbff2d4fd83b750

Zimbra Collaboration Cross Site Scripting

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# [CVE-2018-14013] Reflected Cross-Site Scripting (XSS) vulnerabilities
in Zimbra Collaboration

## Description

Two XSS vulnerabilities have been discovered in Zimbra Collaboration
(initially in version 8.8.8).
Zimbra Collaboration is an open source messaging and collaboration solution.

## Vulnerability records

**Access Vector**: Remote

**Security Risk**: Medium

**Vulnerability**: CWE-79

**CVSS Base Score**: 6.1

**CVSS String**: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

## Details

Two Reflected XSS vulnerabilities allow remote attackers to inject
arbitrary JavaScript in web browsers.

### Proof of Concept - XSS\#1

To reproduce the first XSS, login to https://host.com/zimbra/ and click
on the link below:

```
https://host.com/zimbra/h/search?si=1&so=0&sfi=4&st=message&csi=1&action=&cso=0&id=""><svg
onload=alert(1)>
```

### Proof of Concept - XSS\#2

1. First, login to `https://host.com/zimbra/`

2. Click on "Preferences", then on "Import / Export".

3. Finally, just import a file named `test.<svg onload=alert(2)>` to get
the second XSS payload executed.


## Affected versions

Versions < 8.8.11.

## Solution

Update to version 8.8.11 which includes all fixes.

## Timeline (dd/mm/yyyy)

* 12/07/2018 : Initial discovery
* 21/07/2018 : Vendor notification
* 21/07/2018 : Vendor acknowledgment
* 18/10/2018 : Vendor partial fixes in ZCS 8.8.10 patch 1 and 8.8.9
patch 6 (XSS 1)
* 18/12/2018 : Vendor full fixes in ZCS 8.8.11 (XSS 2)
* 30/01/2019 : Public disclosure

## Credits

* Issam Rabhi <i.rabhi@sysdream.com>

Thanks to the Zimbra security team for the perfect report handling !

--
SYSDREAM Labs <labs@sysdream.com>

GPG :
47D1 E124 C43E F992 2A2E
1551 8EB4 8CD9 D5B2 59A1

* Website: https://sysdream.com/
* Twitter: @sysdream

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