CVE-2019-16278 is a critical directory traversal vulnerability present in the function http_verify of the Nostromo nhttpd server, specifically in versions up to 1.9.6. This vulnerability allows attackers to achieve remote code execution through carefully crafted HTTP requests. Given its CVSS score of 9.8, this vulnerability poses a severe risk to organizations relying on this web server.
The threat posed by this vulnerability is significant as it enables attackers to execute arbitrary code on affected systems without requiring any privileges or user interaction. Organizations using Nostromo nhttpd should prioritize patching this vulnerability immediately to mitigate potential exploitation.
The vulnerability was published on October 14, 2019, and is categorized under CWE-22, which indicates a directory traversal issue. Given the critical nature of this vulnerability and its potential impact, immediate remedial actions are necessary.
As of now, there are known exploits available, and this vulnerability has been added to the Known Exploited Vulnerabilities catalog by CISA, indicating active exploitation in the wild. Organizations must act swiftly to apply necessary patches or mitigations to protect their systems.
Organizations should not only patch this vulnerability but also assess their overall security posture to prevent future occurrences of similar vulnerabilities.
Vulnerability Details
The official description of CVE-2019-16278 states: 'Directory Traversal in the function http_verify in nostromo nhttpd through 1.9.6 allows an attacker to achieve remote code execution via a crafted HTTP request.' This highlights the critical nature of the vulnerability, which could be exploited remotely.
The vulnerability type is classified as a directory traversal, which allows unauthorized access to files and directories outside the intended directory. The CVSS score of 9.8 signifies a critical vulnerability with severe implications for affected systems, specifically regarding confidentiality, integrity, and availability.
The affected vendor is Nazgul, and the specific product is nostromo_nhttpd. This vulnerability was published on October 14, 2019, and is classified under CWE-22.
Technical Analysis
The root cause of this vulnerability lies in the improper handling of user input in the http_verify function, which fails to adequately validate paths. This flaw allows attackers to manipulate file paths, leading to unauthorized access to sensitive files or execution of arbitrary code.
The attack vector for this vulnerability is through the network, allowing attackers to exploit it remotely. The attack complexity is classified as low, meaning that the conditions required for successful exploitation are minimal. No privileges are required to execute the attacks, and user interaction is not necessary, making this vulnerability particularly dangerous.
The impacts of this vulnerability are severe; it can lead to high confidentiality, integrity, and availability impact, as the exploitation could compromise the entire system.
Risk & Impact Analysis
Organizations utilizing Nostromo nhttpd should recognize the real-world risks associated with the exploitation of CVE-2019-16278. The potential for remote code execution can allow attackers to gain full control over affected systems, leading to data breaches, system downtime, and significant financial losses.
The blast radius of this vulnerability is substantial, as it could affect any organization using the vulnerable version of the software. The urgency for remediation is critical, given the active exploitation status of this vulnerability and its inclusion in the KEV catalog, which indicates that it is actively being exploited in the wild.
Organizations should prioritize patching immediately to mitigate risks associated with this vulnerability. Regular security assessments and vulnerability management practices are essential to identify and remediate such vulnerabilities proactively.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | Yes |
Public PoC | Yes |
Actively Exploited | Yes |
Ransomware Use | No |
Affected Versions
The affected version of the Nostromo nhttpd server is any version prior to 1.9.7. All users of the software should ensure they upgrade to the latest version to mitigate this vulnerability.
Mitigation & Remediation
Organizations should apply the following mitigations to address CVE-2019-16278. First, patch the Nostromo nhttpd server to version 1.9.7 or later. If this is not possible, consider discontinuing use of the product until a patch can be applied.
Configuration hardening is also recommended, including limiting access to the server and monitoring for unusual activity. Implementing network controls can help prevent unauthorized access to affected systems.
For ongoing protection, organizations should consider engaging in penetration testing to identify and remediate similar vulnerabilities.
Detection Guidance
To detect potential exploitation of CVE-2019-16278, organizations should monitor logs for indicators of unauthorized access attempts. Behavioral anomalies, such as unexpected processes or file changes, should also be investigated.
Network signatures indicating unusual traffic patterns or attempts to access sensitive files can serve as additional indicators of compromise.
AppSecure Threat Intelligence Insight
CVE-2019-16278 underscores the critical importance of maintaining an up-to-date security posture. This vulnerability represents a prevalent issue in web applications where improper input validation can lead to severe consequences.
Security teams should prioritize regular vulnerability assessments and implement a robust vulnerability management program to identify and address similar issues proactively.
For further insights into effective vulnerability management strategies, security teams may find value in exploring resources such as vulnerability management programs and engaging in penetration testing methodology to enhance their security posture.
Additionally, understanding the implications of directory traversal vulnerabilities can strengthen defenses against potential future exploits.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
.webp)