Zoom Client up to 2.0 on Linux zoommtg:/ Scheme ZoomLauncher os command injection

Summaryinfo

A vulnerability was found in Zoom Client up to 2.0 on Linux. It has been rated as critical. Affected by this vulnerability is an unknown functionality of the file ZoomLauncher of the component zoommtg:/ Scheme Handler. This manipulation causes os command injection. This vulnerability appears as CVE-2017-15049. The attack may be initiated remotely. In addition, an exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability has been found in Zoom Client up to 2.0 on Linux (Unified Communication Software) and classified as critical. Affected by this vulnerability is an unknown function of the file ZoomLauncher of the component zoommtg:/ Scheme Handler. The manipulation with an unknown input leads to a os command injection vulnerability. The CWE definition for the vulnerability is CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

The ZoomLauncher binary in the Zoom client for Linux before 2.0.115900.1201 does not properly sanitize user input when constructing a shell command, which allows remote attackers to execute arbitrary code by leveraging the zoommtg:// scheme handler.

The bug was discovered 12/17/2017. The weakness was presented 12/19/2017 as confirmed mailinglist post (Full-Disclosure). It is possible to read the advisory at seclists.org. This vulnerability is known as CVE-2017-15049 since 10/05/2017. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details and also a public exploit are known. The attack technique deployed by this issue is T1202 according to MITRE ATT&CK.

A public exploit has been developed by Conviso and been published before and not just after the advisory. It is possible to download the exploit at exploit-db.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 2 days. During that time the estimated underground price was around $5k-$25k.

Upgrading to version 2.0.115900.1201 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Exploit-DB (43354). See VDB-110802 for similar entry. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• Unified Communication Software

Vendor

• Zoom

Name

• Client

Version

• 2.0

License

• commercial

CPE 2.3info

• 🔍

CPE 2.2info

• 🔍

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Entryinfo

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