SAR2HTML Remote Code Execution Scanner

Sar2html is a web-based tool used by system administrators and IT professionals for generating and viewing reports generated from sar (System Activity Report) data. It is particularly popular in Unix and Linux environments where it offers a useful interface to visualize system performance metrics. The tool is often utilized to display and analyze system loads over time, aiding in performance tuning and troubleshooting efforts. Organizations leverage sar2html to better understand system usage patterns and detect potential performance issues. The software is open-source, which makes it accessible for companies of all sizes seeking to optimize their systems. However, like many other web-based tools, it can become a vector for attacks if vulnerabilities are not properly managed.

Remote Code Execution (RCE) is a severe vulnerability that allows an attacker to execute arbitrary commands on a remote server. In the context of sar2html, this vulnerability can be exploited through a flaw in the index.php script. Attackers can send specially-crafted commands via the web interface to gain unauthorized access. This type of vulnerability is critical as it can compromise the entire system, allowing malicious actors to manipulate data or take control. RCE vulnerabilities are typically ranked high in severity due to the significant potential damage they can cause if leveraged by an attacker. Proper safeguards and timely patching are essential in mitigating such risks.

The vulnerability in sar2html exploits the index.php script, where user input is not properly sanitized. This allows attackers to inject and execute commands by manipulating query strings sent to the server. The endpoint vulnerable to this attack is accessed via the plot parameter, which can be abused to perform unauthorized actions. This flaw highlights the necessity of stringent input validation and output sanitization in web applications. The exploitation can be conducted remotely without authentication, increasing the urgency for a fix. Security practitioners must keenly assess such vulnerabilities given their potential to execute arbitrary and harmful commands.

When exploited, Remote Code Execution vulnerabilities can have devastating effects, such as unauthorized remote access to internal systems and data breaches. Attackers could install backdoors, spread malware, or launch attacks on other systems in the network. Furthermore, sensitive data can be extracted or modified without the knowledge of system owners. This form of exploit undermines the integrity and confidentiality of data, leading to a loss of trust and potential financial repercussions for the affected organization. Long-term system integrity and business reputation can also be compromised as a result of successful exploitation.

REFERENCES

• https://www.exploit-db.com/exploits/49344