The vulnerability identified as CVE-2025-24855 is classified as a high-severity issue affecting xmlsoft's libxslt. Specifically, the vulnerability involves a use-after-free condition found in the numbers.c file. This flaw arises during nested XPath evaluations, where an XPath context node can be modified but is never restored. This oversight can lead to serious security implications if exploited.
With a CVSS score of 7.8, this vulnerability is categorized under high severity, indicating that it could allow attackers to exploit the vulnerability with significant impacts on confidentiality, integrity, and availability. The potential for exploitation is high given the nature of the flaw and its implications.
Risk to organizations includes unauthorized access and manipulation of data due to the vulnerability. Organizations utilizing the affected versions of libxslt should take immediate steps to address this issue, as it can be leveraged in various attack scenarios.
Currently, there are no known exploits or public Proof of Concepts available for this vulnerability. However, the potential impact necessitates that organizations prioritize patching immediately.
Vulnerability Details
The official description states that numbers.c in libxslt before version 1.1.43 has a use-after-free condition due to modifications in nested XPath evaluations. The relevant functions impacted include xsltNumberFormatGetValue, xsltEvalXPathPredicate, xsltEvalXPathStringNs, and xsltComputeSortResultInternal.
This vulnerability is classified under CWE-416 (Use After Free), highlighting the risk associated with improper management of memory. Organizations using versions of libxslt prior to 1.1.43 are urged to assess their systems and implement necessary updates.
The vulnerability was published on March 14, 2025, and its current status is marked as modified. Organizations should ensure they are using the latest version to mitigate risks associated with this vulnerability.
The attack vector for this vulnerability is local, meaning that an attacker would need local access to exploit it. The attack complexity is considered high, which may limit the ease of exploitation, but it does not lessen the need for remediation.
Technical Analysis
The root cause of CVE-2025-24855 lies in the design of the XPath context node handling within the libxslt library. When nested XPath evaluations occur, modifications to the context node are not reverted, which leads to potential misuse of freed memory.
The attack vector is local, requiring access to the system where libxslt is running. The complexity of the attack is high, as an attacker would need to craft specific XPath queries that exploit the vulnerability effectively.
No user interaction is required to trigger the vulnerability, and the privileges required are none, meaning that any local user could potentially exploit this vulnerability.
In terms of impact, the confidentiality impact is none, while both integrity and availability impacts are high. This indicates that while sensitive data may not be disclosed, the integrity of the data could be compromised, alongside potential disruption to service availability.
Risk & Impact Analysis
The real-world deployment risk associated with CVE-2025-24855 is critical, as exploitation could lead to unauthorized modification of data and potential denial of service. Given the nature of the vulnerability, the blast radius could extend to any application leveraging the affected versions of libxslt, impacting multiple systems.
Organizations should address this vulnerability with a high urgency, as the potential for exploitation exists. The CVSS score of 7.8 indicates a significant risk level, and although no known exploits are currently available, proactive measures are essential.
Monitoring for unusual behavior and potential indicators of compromise should be put in place, especially in environments where libxslt is deployed. Security teams should ensure that they are prepared to respond to any incidents that may arise due to this vulnerability.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The affected product is libxslt, specifically all versions prior to 1.1.43. Organizations are advised to upgrade to this version or later to mitigate the risks associated with CVE-2025-24855.
Mitigation & Remediation
To remediate this vulnerability, organizations should apply the latest patches for libxslt as soon as possible. If immediate patching is not feasible, consider implementing workarounds such as restricting access to the affected systems and employing additional network controls to mitigate potential exploitation.
Organizations should validate remediation through penetration testing to identify similar weaknesses.
Detection Guidance
Monitoring for unusual log indicators and behavioral anomalies is essential. Security teams should look for signs of unexpected modifications to XPath context nodes and other anomalies indicative of exploitation attempts.
AppSecure Threat Intelligence Insight
CVE-2025-24855 highlights a critical vulnerability that underscores the importance of robust memory management in software development. As libraries like libxslt are widely utilized, vulnerabilities of this nature can have far-reaching implications.
Organizations should take this opportunity to assess their security postures and ensure that similar vulnerabilities are not present in other components of their technology stack. The lessons learned from this incident should drive proactive development practices aimed at avoiding memory management errors.
For further insights into securing software development, organizations can explore resources such as the penetration testing methodology and the importance of effective vulnerability management programs.
Additionally, organizations should consider continuous security testing to identify vulnerabilities in real-time, a practice highlighted in our vulnerability management program design article.
By implementing these strategies, organizations can fortify their defenses against similar vulnerabilities in the future.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
.webp)