A bug in PSL validation logic in Apache HttpClient 5.4.x disables domain checks, affecting cookie management and host name verification. Discovered by the Apache HttpClient team, this vulnerability is classified as high severity with a CVSS score of 7.5. The vulnerability is significant because it can lead to unauthorized access or manipulation of cookies, potentially allowing attackers to impersonate users or hijack sessions.
The vulnerability affects Apache HttpClient versions 5.4.x, specifically versions prior to 5.4.3, and is also relevant to NetApp's ONTAP Tools. Organizations utilizing affected versions should be aware of the risks and the potential impact on their systems. This vulnerability was fixed in the 5.4.3 release.
Risk to organizations includes the potential for attackers to exploit this vulnerability, which could lead to unauthorized access or manipulation of sensitive information. Organizations should prioritize patching immediately to mitigate these risks.
As of now, there are no known exploits for this vulnerability, but it is essential for organizations to remain vigilant and ensure they are operating on the latest version of the affected products.
For more information and updates on this vulnerability, organizations should refer to the official advisories published by Apache and NetApp.
Vulnerability Details
The vulnerability is described as a bug in PSL validation logic in Apache HttpClient 5.4.x, which disables domain checks. This impacts cookie management and host name verification, making it easier for attackers to exploit these weaknesses.
The CVSS score for this vulnerability is 7.5, indicating a high severity level. The potential impacts include a high integrity impact, while confidentiality and availability impacts are rated as none.
The affected products are Apache HttpClient and NetApp ONTAP Tools, with the vulnerability being present in all versions prior to the vendor patch 5.4.3.
Technical Analysis
The root cause of this vulnerability lies in the improper handling of PSL validation logic, which fails to enforce domain checks. This can lead to cookie management issues, where cookies may be mismanaged or improperly validated.
The attack vector is classified as network-based, meaning attackers can exploit this vulnerability remotely. The complexity of the attack is low, requiring no privileges or user interaction to exploit.
In terms of impact, while confidentiality is not affected, the integrity impact is high. This indicates that an attacker can manipulate or alter the data integrity, potentially leading to unauthorized actions or data alterations.
Risk & Impact Analysis
The real-world risk associated with this vulnerability is significant, given the potential for unauthorized access and manipulation. Should this vulnerability be exploited, it can result in severe impacts on organizations, including reputational damage, loss of sensitive data, and compliance issues.
Organizations using Apache HttpClient and NetApp ONTAP Tools are advised to address this vulnerability in their priority patch cycle. Immediate action is necessary to safeguard against potential exploitation.
With the exploitation status currently being unknown, organizations should remain cautious and closely monitor for any updates regarding the vulnerability or any emerging exploits.
Timely remediation is essential to minimize the blast radius and protect against potential attacks leveraging this vulnerability.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The affected versions of Apache HttpClient are all versions starting from 5.4 up to, but not including, 5.4.3. Additionally, NetApp ONTAP Tools version 10 is also affected. Organizations should ensure they are updated to the latest releases to mitigate the risks associated with this vulnerability.
Mitigation & Remediation
Organizations should prioritize patching to version 5.4.3 of Apache HttpClient to remediate this vulnerability. If patching is not immediately possible, consider implementing network controls to limit exposure and monitor for any unusual activity that may indicate exploitation attempts.
For comprehensive testing, organizations can engage in penetration testing to validate the effectiveness of their remediation efforts.
In addition, organizations should review their cookie management practices and host name verification processes to ensure they are robust and not susceptible to similar vulnerabilities.
Detection Guidance
Organizations should monitor their logs for any indicators of exploitation attempts related to cookie management and host name verification. Look for anomalies in cookie behavior or unexpected changes in session data.
Regular audits and behavioral analysis can also help in identifying any unauthorized modifications or access patterns that may indicate the presence of this vulnerability.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2025-27820 highlights the ongoing challenges in software development regarding secure coding practices, particularly in cookie management and domain validation mechanisms. This vulnerability serves as a reminder for security teams to adopt stringent validation processes and conduct thorough testing to avoid similar issues in the future.
As the landscape of cyber threats evolves, organizations must prioritize the lessons learned from this vulnerability, ensuring that they maintain a proactive approach to security. Engaging in vulnerability management programs can be instrumental in identifying and mitigating such risks effectively.
Additionally, organizations should consider penetration testing methodologies that encompass comprehensive testing strategies to uncover vulnerabilities before they can be exploited.
Ultimately, organizations must be vigilant and adaptive, continuously refining their security posture to address both current and emerging threats.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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