Mathjax, an open-source JavaScript display engine for mathematics, has been identified with two Regular Expression Denial of Service (ReDoS) vulnerabilities in versions up to 2.7.9. These vulnerabilities occur in the MathJax.js file via the components pattern and markdownPattern. The high-severity CVSS score of 7.5 indicates a significant potential for disruption, particularly regarding availability impact, which is rated as high.
The attack vector is network-based, requiring no privileges or user interaction, which increases the vulnerability's appeal to attackers. While the vendor disputes the vulnerability's impact, stating that the regular expressions are not applied to user input, this still poses a risk that organizations must take seriously. Organizations should prioritize patching immediately.
As of now, there are no known exploits confirmed in the wild for this vulnerability, and it is not included in the Known Exploited Vulnerabilities (KEV) catalog. However, the potential for exploitation still exists, and defenders are urged to remain vigilant.
Given the implications of this vulnerability, organizations using Mathjax must actively monitor for any updates or patches from the vendor and ensure their systems are secured against potential attacks.
Vulnerability Details
The official description states: 'Mathjax up to v2.7.9 was discovered to contain two Regular expression Denial of Service (ReDoS) vulnerabilities in MathJax.js via the components pattern and markdownPattern. NOTE: the vendor disputes this because the regular expressions are not applied to user input; thus, there is no risk.' This raises questions about the actual risk, but given the high CVSS score, it is prudent to consider its potential impact seriously.
The vulnerability is classified under CWE-1333, which pertains to Regular Expression Denial of Service vulnerabilities. The CVSS version used for scoring is 3.1, and the attack complexity is rated low, indicating that the vulnerability is easy to exploit.
Technical Analysis
The root cause of this vulnerability lies in the regular expressions utilized within MathJax.js. These patterns, while designed for specific matching tasks, can be leveraged in a way that causes the application to consume excessive resources, leading to a Denial of Service condition.
The attack vector is network-based, which means that an attacker could exploit this vulnerability remotely without needing physical access to the system. The attack complexity is low, and no privileges are required to exploit this vulnerability, making it a significant risk. No user interaction is required, which further simplifies the attack process.
In terms of impacts, the confidentiality and integrity impacts are rated as none, while the availability impact is rated high. This means that while data may not be compromised, the application could become unavailable due to the resource exhaustion caused by the exploit.
Risk & Impact Analysis
Risk to organizations includes potential service interruptions due to the Denial of Service caused by the exploitation of this vulnerability. The fact that the vulnerability is network-exploitable with low complexity increases its attractiveness to attackers, potentially leading to significant operational disruptions.
Organizations using Mathjax must assess their exposure to this vulnerability, particularly if they rely on this technology for rendering mathematical content. Given the high CVSS score, organizations should address this vulnerability in their priority patch cycle. The urgency for remediation is reinforced by the potential for exploitation in the wild, despite the vendor's dispute regarding the risk.
With an EPS score of 0.00188, this vulnerability is in the lower percentile, suggesting that while exploitation is not highly likely, it remains a risk that should not be overlooked. Organizations should schedule remediation and be prepared to monitor for any developments related to this vulnerability.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
This vulnerability affects all versions of Mathjax up to and including v2.7.9. Organizations utilizing this library should verify their Mathjax installations and apply necessary updates as they become available.
Mitigation & Remediation
Organizations should prioritize upgrading to the latest version of Mathjax as soon as a patch is available. If immediate patching is not feasible, they should consider implementing network controls to restrict access to vulnerable components of their applications. Continuous monitoring for anomalies in application performance can also help detect potential exploitation attempts.
For further security measures, organizations may want to engage in penetration testing to rigorously assess their environments for similar vulnerabilities.
Detection Guidance
To detect potential exploitation of this vulnerability, organizations should monitor logs for patterns indicative of ReDoS attacks, such as excessive resource consumption or unusual traffic patterns targeting Mathjax components. Additionally, behavioral anomalies in application performance can serve as critical indicators of an attack in progress.
AppSecure Threat Intelligence Insight
The identification of this vulnerability in Mathjax highlights the ongoing challenges faced by organizations in managing third-party libraries and components. It underscores the importance of regular security assessments and vulnerability management practices to ensure that all software components are up to date and secure.
Organizations should also invest in vulnerability management programs that facilitate proactive identification and remediation of vulnerabilities in their applications.
As technology continues to evolve, the complexity of vulnerabilities like this will likely increase, making it essential for security teams to stay informed and adapt their strategies accordingly. Emphasizing penetration testing methodologies and regular assessments will be key in mitigating risks associated with third-party components.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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