CVE-2023-23925 : What You Need to Know
Learn about CVE-2023-23925 impacting Switcher Client, leading to Regular Expression Denial of Service. Mitigate risk with immediate updates and long-term security practices.
This CVE involves Switcher Client containing a vulnerability known as Regular Expression Denial of Service (ReDoS). The issue has been assigned a CVSS base score of 8.6, indicating a high severity level.
Understanding CVE-2023-23925
Switcher Client, a JavaScript SDK used to interact with Switcher API for cloud-based Feature Flag, is susceptible to a Regular Expression Denial of Service (ReDoS) exploit. This vulnerability arises due to unsanitized input flowing into the Strategy match operation (EXIST), leading to the construction of a regular expression that can be exploited for a denial of service attack.
What is CVE-2023-23925?
The CVE-2023-23925 vulnerability within Switcher Client allows for the exploitation of regular expressions in Strategy settings, potentially leading to a ReDoS attack. It has been addressed in version 3.1.4 of the software.
The Impact of CVE-2023-23925
The impact of CVE-2023-23925 is significant, as it can potentially result in a denial of service attack on systems utilizing the Switcher Client SDK. This could lead to service disruption and availability issues for affected systems.
Technical Details of CVE-2023-23925
The vulnerability is categorized under two problem types: inefficient regular expression complexity (CWE-1333) and uncontrolled resource consumption (CWE-400). The CVSS v3.1 score for this CVE rates the attack vector as network-based, with a high impact on availability and a low impact on confidentiality and integrity. No user interaction or specific privileges are required to exploit this vulnerability.
Vulnerability Description
The vulnerability in Switcher Client stems from the insecure handling of unsanitized input in Strategy settings, leading to the creation of a regular expression that can be abused to trigger a ReDoS attack.
Affected Systems and Versions
The affected product is "switcher-client-master" by switcherapi, specifically versions prior to 3.1.4. Systems using versions older than 3.1.4 are susceptible to the Regular Expression Denial of Service vulnerability.
Exploitation Mechanism
By manipulating Strategy settings that utilize REGEX in combination with EXIST and NOT_EXIST operations, threat actors can exploit this vulnerability to initiate a ReDoS attack, potentially causing service interruptions.
Mitigation and Prevention
To address CVE-2023-23925 and mitigate the risk associated with the Regular Expression Denial of Service vulnerability in Switcher Client, immediate action and long-term security practices are crucial.
Immediate Steps to Take
It is recommended to update to version 3.1.4 of Switcher Client to eliminate the vulnerability. Additionally, organizations should review and adjust Strategy settings to avoid using REGEX with specific operations that could be exploited.
Long-Term Security Practices
Implementing secure coding practices, input validation, and regular security assessments can help prevent similar vulnerabilities in the future. Educating developers on the risks of ReDoS attacks and implementing secure coding guidelines is essential for long-term security.
Patching and Updates
Regularly monitoring for software updates and promptly applying patches released by the vendor is crucial to ensure that known vulnerabilities are addressed. Keeping software and libraries up to date helps bolster the overall security posture of an organization.