VDB-101653 · CVE-2017-6821 · BID 98090

Synacor Zimbra Collaboration up to 8.7.5 path traversal

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.
8.2	$0-$5k	0.00

Summaryinfo

A vulnerability classified as critical has been found in Synacor Zimbra Collaboration up to 8.7.5. This affects an unknown part. This manipulation causes path traversal. This vulnerability appears as CVE-2017-6821. The attack may be initiated remotely. There is no available exploit. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Synacor Zimbra Collaboration up to 8.7.5 (Groupware Software). It has been declared as critical. Affected by this vulnerability is some unknown processing. The manipulation with an unknown input leads to a path traversal vulnerability. The CWE definition for the vulnerability is CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Directory traversal vulnerability in Zimbra Collaboration Suite (aka ZCS) before 8.7.6 allows attackers to have unspecified impact via unknown vectors.

The bug was discovered 05/05/2017. The weakness was presented 05/23/2017 by Greg Solovyev (Website). The advisory is shared at wiki.zimbra.com. This vulnerability is known as CVE-2017-6821 since 03/11/2017. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1006 for this issue.

The vulnerability was handled as a non-public zero-day exploit for at least 18 days. During that time the estimated underground price was around $0-$5k.

Upgrading to version 8.7.6 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 98090†). See VDB-99055 and VDB-101652 for similar entries. 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: 8.5
VulDB Meta Temp Score: 8.4

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
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: Path traversal
CWE: CWE-22
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

OpenVAS ID: 800201
OpenVAS Name: Zimbra Collaboration Multiple Vulnerabilities
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Zimbra Collaboration 8.7.6

Timelineinfo

03/11/2017 🔍
05/01/2017 +51 days 🔍
05/05/2017 +4 days 🔍
05/23/2017 +18 days 🔍
05/23/2017 +0 days 🔍
05/23/2017 +0 days 🔍
02/03/2020 +986 days 🔍

Sourcesinfo

Vendor: synacor.com

Advisory: wiki.zimbra.com
Researcher: Greg Solovyev
Status: Not defined
Confirmation: 🔍

CVE: CVE-2017-6821 (🔍)
GCVE (CVE): GCVE-0-2017-6821
GCVE (VulDB): GCVE-100-101653
SecurityFocus: 98090 - Zimbra Collaboration Suite CVE-2017-6821 Unspecified Security Vulnerability

See also: 🔍

Entryinfo

Created: 05/23/2017 12:47
Updated: 02/03/2020 19:54
Changes: 05/23/2017 12:47 (68), 02/03/2020 19:54 (2)
Complete: 🔍
Cache ID: 216:893:103

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