Zammad up to 1.0.3/1.1.2/1.2.0 Attachment cross site scripting

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.
4.9	$0-$5k	0.00

Summaryinfo

A vulnerability has been found in Zammad up to 1.0.3/1.1.2/1.2.0 and classified as problematic. Affected is an unknown function of the component Attachment Handler. The manipulation leads to cross site scripting. This vulnerability is uniquely identified as CVE-2017-5620. The attack is possible to be carried out remotely. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Zammad up to 1.0.3/1.1.2/1.2.0. This issue affects an unknown part of the component Attachment Handler. The manipulation with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Impacted is integrity. The summary by CVE is:

An XSS issue was discovered in Zammad before 1.0.4, 1.1.x before 1.1.3, and 1.2.x before 1.2.1. Attachments are opened in a new tab instead of getting downloaded. This creates an attack vector of executing code in the domain of the application.

The bug was discovered 02/14/2017. The weakness was disclosed 03/13/2017 by Lukas Reschke (Website). The advisory is shared at zammad.com. The identification of this vulnerability is CVE-2017-5620 since 01/29/2017. 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. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

The vulnerability was handled as a non-public zero-day exploit for at least 27 days. During that time the estimated underground price was around $0-$5k.

Upgrading to version 1.0.4, 1.1.3 or 1.2.1 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 96937†). The entries VDB-97876, VDB-97878, VDB-97882 and VDB-97883 are pretty similar. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Name

• Zammad

Version

• 1.0
• 1.0.0
• 1.0.1
• 1.0.2
• 1.0.3
• 1.1
• 1.1.0
• 1.1.1
• 1.1.2
• 1.2.0

License

• open-source

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.2
VulDB Meta Temp Score: 5.1

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.1
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 scripting
CWE: CWE-79 / CWE-94 / CWE-74
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

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: 🔍

Upgrade: Zammad 1.0.4/1.1.3/1.2.1

Timelineinfo

01/29/2017 🔍
02/14/2017 +16 days 🔍
03/13/2017 +27 days 🔍
03/13/2017 +0 days 🔍
03/13/2017 +0 days 🔍
03/13/2017 +0 days 🔍
09/06/2020 +1273 days 🔍

Sourcesinfo

Advisory: zammad.com
Researcher: Lukas Reschke
Status: Not defined
Confirmation: 🔍

CVE: CVE-2017-5620 (🔍)
GCVE (CVE): GCVE-0-2017-5620
GCVE (VulDB): GCVE-100-97877
SecurityFocus: 96937 - Zammad Multiple Security Vulnerabilities
OSVDB: - CVE-2017-5620 - Zammad - Cross-Site Scripting Issue

See also: 🔍

Entryinfo

Created: 03/13/2017 13:26
Updated: 09/06/2020 11:18
Changes: 03/13/2017 13:26 (60), 09/06/2020 11:18 (6)
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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