External risk intelligence

Apache Kylin Command Injection Vulnerability.

CVE advisoryKnown Exploit

CVE-2020-1956

Apache Kylin's REST APIs contain a vulnerability allowing unauthorized command execution on affected systems. This risk impacts organizations using the vulnerable versions, potentially compromising data and systems. The business risk involves attackers executing arbitrary commands without validation.

3Halo Surface Signal

OS Command Injection

Apache Kylin

2.3.0 to 2.3.22.5.0 to 2.5.22.6.0 to 2.6.52.4.02.4.13.0.03.0.1

External exposure likelihood

Halo Surface Signal score for CVE-2020-1956

Apache Kylin is an analytical data warehouse platform. While it provides REST APIs, these are typically used by internal data scientists or backend applications rather than being exposed directly to the public internet. Access is usually mediated by internal networks, making public-facing deployment possible but not the standard or designed use case.

Horizon Alert

Summary of the vulnerability and why it matters

Apache Kylin, an analytical data warehouse platform, has a vulnerability within its REST APIs. The flaw allows user input to be combined with operating system commands without proper validation. This could enable unauthorized execution of commands on the affected systems.

  • Vulnerable component: Apache Kylin REST APIs
  • Core weakness: Unvalidated user input in OS commands
  • Main business impact: Unauthorized command execution

Attack Path

How an attacker could exploit the issue

Apache Kylin's restful APIs can be exploited by concatenating user input with operating system commands. This allows an attacker to execute arbitrary commands without necessary validation. This could lead to unauthorized system access and data manipulation.

  • Exposed APIs to attackers.
  • Attacker injects commands.
  • System control and data impact.

Live Threat

Current exploitation, exposure, and threat context

The Apache Kylin platform has a vulnerability that allows for the execution of operating system commands. This could enable attackers to run unauthorized commands on affected systems, potentially leading to data compromise or system disruption. Organizations utilizing the affected versions of Apache Kylin should consider this a significant risk.

  • Likely attacker skill level: Low.
  • Required access or conditions: Network access, low privileges.
  • Business risk or urgency: High.

Priority actions

Operational Fix

Recommended remediation, mitigation, and detection steps

The organization's Apache Kylin instances may be vulnerable to an operating system command injection flaw. An attacker could potentially execute arbitrary commands on the system without proper validation. This could lead to unauthorized access and compromise of sensitive data.

  • Identify all Apache Kylin assets.
  • Restrict access to affected systems.
  • Apply vendor updates and verify.
  • Monitor for related system activity.

Frequently asked questions

What versions of Apache Kylin are affected by the CVE-2020-1956 vulnerability?

Apache Kylin versions 2.3.0 through 2.3.2, 2.5.0 through 2.5.2, 2.6.0 through 2.6.5, 2.4.0, 2.4.1, and 3.0.0 through 3.0.1 are affected by this vulnerability.

What is the weakness class for CVE-2020-1956?

The weakness class identified for CVE-2020-1956 is CWE-78, which relates to OS command injection. This means that the software improperly neutralizes special elements that are intended to be interpreted as operating system commands.

How can an attacker exploit the CVE-2020-1956 vulnerability?

Attackers can exploit this vulnerability by leveraging the REST APIs in Apache Kylin that concatenate user input with OS commands without adequate validation. This allows for the execution of arbitrary operating system commands.

Is there specific threat intelligence regarding CVE-2020-1956 and Halo Surface Signal?

Halo classifies this CVE as 'Possible' due to Apache Kylin being an analytical data warehouse platform. While it has REST APIs, they are typically used internally and not directly exposed to the public internet, suggesting public-facing deployment is possible but not the standard use case.

What steps should be taken to address the Apache Kylin command injection vulnerability?

To address this vulnerability, identify all Apache Kylin assets, restrict access to affected systems, apply vendor updates, and monitor for related system activity. The CISA has also listed this CVE as known exploited and recommended applying updates per vendor instructions by April 15, 2022.

References