CVE-2024-23807 is a critical vulnerability affecting the Apache Xerces C++ XML parser, specifically in versions 3.0.0 before 3.2.5. This vulnerability allows a use-after-free error to be triggered during the scanning of external DTDs, which can lead to severe security implications for systems relying on these versions. The CVSS score of 9.8 underlines the critical nature of this vulnerability, indicating a high potential for exploitation.
Risk to organizations includes unauthorized access, data corruption, or denial of service. Given the nature of the vulnerability, attackers may leverage it to disrupt services or gain sensitive information. Organizations should prioritize patching immediately to safeguard against these risks.
The issue has been acknowledged and documented previously as CVE-2018-1311, but the prior advisory incorrectly stated that it would be fixed in versions 3.2.3 or 3.2.4. Users are thus recommended to upgrade to version 3.2.5 to address this vulnerability or mitigate it by disabling DTD processing via the DOM or SAX.
As of now, there are no known exploits available in the public domain, and the vulnerability is not listed in the Known Exploited Vulnerabilities (KEV) catalog. However, given its critical nature, organizations should remain vigilant.
Addressing this vulnerability should be a high priority in the security patch cycle to avoid potential exploitation.
Vulnerability Details
The Apache Xerces C++ XML parser is affected by a use-after-free vulnerability found in versions 3.0.0 through 3.2.5. The vulnerability arises when the parser scans external DTDs, leading to undefined behavior and potential exploitation.
The official description emphasizes the need for users to upgrade to version 3.2.5, which rectifies the use-after-free error. Alternatively, users can disable DTD processing, either through a standard parser feature in the DOM or by utilizing the XERCES_DISABLE_DTD environment variable in SAX.
The vulnerability is classified under CWE-416, indicating a use-after-free error. The CVSS v3.1 score of 9.8 highlights the critical severity, with high impacts on confidentiality, integrity, and availability.
Technical Analysis
The root cause of CVE-2024-23807 is a use-after-free error that occurs during the parsing of external DTDs. This vulnerability can be exploited through a network attack vector, requiring no privileges or user interaction, which makes it particularly dangerous.
The attack complexity is classified as low, allowing attackers to potentially leverage the vulnerability without significant effort. The impacts include high confidentiality, integrity, and availability risks, which means that successful exploitation could lead to unauthorized access and significant disruption.
Risk & Impact Analysis
Organizations utilizing the affected versions of the Apache Xerces C++ XML parser face significant risks. The potential for exploitation involving unauthorized access or data corruption can lead to severe operational disruptions. The critical nature of the vulnerability, as indicated by its CVSS score, necessitates immediate attention.
Given that the vulnerability is not currently listed in the KEV catalog, organizations may mistakenly assume a lower level of urgency. However, the exploitability and potential impact mean that this should be treated as a top priority within the patch management process.
The blast radius of a successful exploit could extend to any system utilizing the vulnerable parser, affecting not just individual applications but potentially entire networks. Organizations should assess their exposure and act to remediate the vulnerability swiftly.
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The vulnerable versions of Apache Xerces C++ include all versions from 3.0.0 up to, but not including, 3.2.5. Organizations should ensure they upgrade to version 3.2.5 or later to mitigate this vulnerability.
Mitigation & Remediation
To remediate CVE-2024-23807, organizations should upgrade to Apache Xerces C++ version 3.2.5 or later. If upgrading is not immediately feasible, users can disable DTD processing through either the DOM using a standard parser feature or via SAX using the XERCES_DISABLE_DTD environment variable.
For further guidance on secure coding practices, organizations may consider implementing comprehensive security assessments, including application security assessments and regular penetration testing to identify and address vulnerabilities proactively.
Detection Guidance
Organizations should monitor logs for any anomalies related to DTD processing in their XML parsing. Additionally, they should be vigilant for unexpected application crashes or abnormal behavior that may indicate exploitation attempts.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2024-23807 lies in its representation of the ongoing vulnerabilities present in widely used libraries such as Apache Xerces. As organizations increasingly rely on such libraries for XML processing, the security implications continue to grow.
Security teams should learn from this incident to reinforce their assessment and remediation strategies. Regular audits and updates of third-party libraries can help mitigate risks associated with vulnerabilities like this.
For organizations looking to strengthen their security posture, engaging in red teaming services can provide insights into potential weaknesses and enhance overall security measures.
Furthermore, adopting a comprehensive penetration testing approach can help organizations identify and rectify vulnerabilities proactively.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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