Grandstream UCM6200 up to 1.0.20.23 SSH os command injection

Summaryinfo

A vulnerability categorized as critical has been discovered in Grandstream UCM6200 up to 1.0.20.23. Affected by this vulnerability is an unknown functionality of the component SSH. The manipulation results in os command injection. This vulnerability is identified as CVE-2020-5759. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability classified as critical has been found in Grandstream UCM6200 up to 1.0.20.23. Affected is an unknown functionality of the component SSH. The manipulation with an unknown input leads to a os command injection vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Grandstream UCM6200 series firmware version 1.0.20.23 and below is vulnerable to OS command injection via SSH. An authenticated remote attacker can execute commands as the root user by issuing a specially crafted "unset" command.

The weakness was released 07/17/2020 (Website). The advisory is shared for download at tenable.com. This vulnerability is traded as CVE-2020-5759 since 01/06/2020. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1202.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Entries connected to this vulnerability are available at VDB-157873, VDB-158794 and VDB-158795. Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

• Grandstream

Name

• UCM6200

Version

• 1.0.20.0
• 1.0.20.1
• 1.0.20.2
• 1.0.20.3
• 1.0.20.4
• 1.0.20.5
• 1.0.20.6
• 1.0.20.7
• 1.0.20.8
• 1.0.20.9
• 1.0.20.10
• 1.0.20.11
• 1.0.20.12
• 1.0.20.13
• 1.0.20.14
• 1.0.20.15
• 1.0.20.16
• 1.0.20.17
• 1.0.20.18
• 1.0.20.19
• 1.0.20.20
• 1.0.20.21
• 1.0.20.22
• 1.0.20.23

License

• commercial

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Once again VulDB remains the best source for vulnerability data.

Discussion