CVE-2023-27641 Scanner

The L-Soft LISTSERV is a widely used email list management software that allows users to manage electronic email lists with ease. It is used by educational institutions, corporations, and government bodies to efficiently handle communications and manage mailing lists. This software supports automated email list management which includes subscription coordination, delivering newsletters, and maintaining communication archives. It serves as a centralized platform to distribute information, thereby optimizing mass communication efforts. LISTSERV is lauded for its high reliability and scalability that make it suitable for organizations with extensive mailing needs. Through its extensive set of features and automation capabilities, L-Soft LISTSERV helps optimize organizational communication strategies.

Cross-Site Scripting (XSS) is a type of vulnerability that allows attackers to inject malicious scripts into content from otherwise trusted websites. It occurs when an application includes untrusted data in a web page without proper validation or escaping. XSS allows attackers to execute scripts in the victim's browser, leading to multiple potential malicious actions. In the case of L-Soft LISTSERV, version 16.5 before 17 is vulnerable to XSS, allowing an attacker to conduct attacks via crafted URLs. Successful exploitation can lead to unauthorized access and data theft, compromising user privacy and security. Addressing XSS vulnerabilities is crucial as they can impact the integrity, confidentiality, and availability of data.

In technical terms, the vulnerability exists in the REPORT parameter of wa.exe in the L-Soft LISTSERV software. This parameter, found within specific URL structures, fails to adequately sanitize user input, allowing injection and execution of arbitrary scripts. Inadequate protection mechanisms let attackers craft URLs containing malicious scripts that get executed instead of being displayed. The URL injections typically appear in places where user input is processed and integrated into web page components. By exploiting this, attackers can extract sensitive information, hijack user sessions, or redirect users to malicious websites.

When exploited, the XSS vulnerability in L-Soft LISTSERV can have significant impacts on both individual users and organizations. Attackers can use it to hijack sessions, carrying out actions as if they are the legitimate users, leading to unauthorized use and access to restricted parts of the application. Data theft is another severe consequence, where attackers access sensitive stored data and communications, undermining user privacy and organizational confidentiality. Website defacements and distribution of malicious content to users are also possible, damaging the reputation of the affected organization. Prevention of exploitation requires comprehensive security measures and timely software updates.

REFERENCES

• https://github.com/hosakauk/exploits/blob/master/listserv_report_xss.MD
• https://nvd.nist.gov/vuln/detail/CVE-2023-27641