The vulnerability identified as CVE-2023-29827 affects ejs version 3.1.9, allowing for a critical server-side template injection. This vulnerability arises when the ejs file is controllable, enabling template injection through the configuration settings of the closeDelimiter parameter. The vendor disputes this claim, asserting that the render function is not intended to be utilized with untrusted input. With a CVSS score of 9.8, this vulnerability is classified as critical, signifying its potential to cause severe damage.
Risk to organizations includes the potential for attackers to leverage this vulnerability to execute arbitrary code or access sensitive data, greatly impacting confidentiality, integrity, and availability. Given the severity of this vulnerability, organizations should prioritize patching immediately to mitigate associated risks.
Currently, there is no known public exploit or proof of concept available for this vulnerability. Nevertheless, organizations should remain vigilant, as the lack of known exploitation does not diminish the immediate threat it poses. Security teams are advised to assess their environments and implement necessary mitigations.
In light of the urgency surrounding this vulnerability, organizations utilizing affected versions of ejs should take swift action to implement patches or workarounds to safeguard their applications from potential attacks.
Vulnerability Details
The vulnerability allows for server-side template injection in ejs v3.1.9. The CVE was published on May 4, 2023, and the weakness is categorized under CWE-74. As per the CVSS metrics, the attack vector is classified as NETWORK, with a low attack complexity and no privileges required, meaning any unauthenticated attacker can exploit this vulnerability without user interaction.
The vulnerability's impact on confidentiality, integrity, and availability is high, indicating a significant risk to organizations that utilize this software.
Technical Analysis
The root cause of this vulnerability stems from improper handling of user-supplied input within the ejs template rendering process. The attack vector is network-based, meaning an attacker can exploit the vulnerability remotely. The attack complexity is low, and no privileges are required, making this vulnerability easily exploitable by an attacker with minimal technical skills. Furthermore, user interaction is not necessary, increasing the likelihood of successful exploitation.
The potential impact of this vulnerability includes significant confidentiality breaches, integrity alterations, and availability disruptions. Organizations should assess their exposure and take necessary steps to secure their applications.
Risk & Impact Analysis
The deployment risk for organizations using ejs 3.1.9 is high, considering the potential for attackers to exploit this vulnerability to execute arbitrary code or disrupt services. The blast radius is significant, as many applications may use this technology, leading to widespread impact if not addressed promptly.
Organizations should prioritize mitigation efforts immediately due to the critical nature of this vulnerability. The presence of high confidentiality, integrity, and availability impacts further underscores the urgency for security teams to act.
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The affected versions include ejs v3.1.9. Organizations using this version should take immediate steps to update to a patched version to mitigate risks associated with this vulnerability.
Mitigation & Remediation
Organizations should prioritize patching this vulnerability. Upgrade to the latest version of ejs that addresses this issue. If a patch is not available, consider implementing configuration changes that disallow untrusted input in the rendering process. Additionally, organizations should conduct regular security assessments to identify vulnerabilities in their applications, which can include penetration testing to validate security posture.
Detection Guidance
Organizations should monitor logs for any anomalies that may indicate attempts to exploit this vulnerability. Look for unusual activity in requests that interact with ejs templates, and ensure that any changes to the application are documented and reviewed.
AppSecure Threat Intelligence Insight
This vulnerability underscores the importance of secure coding practices. As organizations increasingly rely on template engines, the need for robust security measures becomes paramount. Security teams should learn from this incident to enhance their vulnerability management strategies and ensure that similar vulnerabilities are addressed proactively in the future. For further reading on best practices, consider exploring our penetration testing methodology and adopt relevant guidelines to improve application security.
Moreover, organizations should remain aware of the evolving threat landscape and continuously improve their defenses. Staying informed and conducting regular assessments will aid in identifying and mitigating risks associated with vulnerabilities like CVE-2023-29827.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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