A flaw was found in the c-ares package. The ares_set_sortlist is missing checks about the validity of the input string, which allows a possible arbitrary length stack overflow. This issue may cause a denial of service or a limited impact on confidentiality and integrity. With a CVSS score of 8.6, this vulnerability is classified as high severity, indicating that it poses a significant risk to affected systems.
Risk to organizations includes potential denial of service and possible limited impacts to confidentiality and integrity. This vulnerability can be exploited over the network without requiring user interaction or elevated privileges. Organizations should prioritize patching immediately.
As of now, there are no known exploits available for this vulnerability, and it has not been added to the Known Exploited Vulnerabilities (KEV) catalog. However, the potential for exploitation remains, making it critical for organizations to address this vulnerability in their systems.
Organizations using the c-ares package should take immediate action to update their systems. The lack of input validation in the affected function can lead to severe consequences, emphasizing the importance of addressing this vulnerability promptly.
Vulnerability Details
The vulnerability identified as CVE-2022-4904 affects the c-ares package, where the ares_set_sortlist function lacks validity checks for input strings. This oversight can lead to an arbitrary length stack overflow. The vulnerability is classified under CWE-20 (Improper Input Validation) and CWE-1284 (Output of Resource or Memory Address).
The vulnerability has been assigned a CVSS score of 8.6, indicating a high severity level. Its metrics reveal low attack complexity, no privileges required, and no user interaction needed, making it easier for an attacker to exploit.
The vulnerability impacts multiple products including c-ares, enterprise_linux, and fedora, with affected versions being all versions prior to the vendor patch. The publication date of the vulnerability was March 6, 2023.
Technical Analysis
The root cause of this vulnerability lies in improper input validation within the ares_set_sortlist function of the c-ares package. Attackers may exploit this vulnerability by sending a specially crafted input string that can cause a stack overflow.
The attack vector for this vulnerability is over the network, as it can be triggered without physical access to the system. The attack complexity is low, meaning that it does not require any specialized knowledge or sophisticated techniques. Importantly, no privileges are required to exploit this vulnerability, and user interaction is not necessary.
The impact of this vulnerability is significant due to its potential to affect availability, confidentiality, and integrity. Specifically, it can lead to denial of service, while the impacts on confidentiality and integrity are considered low.
Risk & Impact Analysis
Organizations using the c-ares package should be aware of the real-world risks associated with this vulnerability. The potential for denial of service attacks means that systems may become temporarily unusable, which can severely impact business operations.
This vulnerability may also affect the confidentiality and integrity of data processed by affected systems, although the impact on these aspects is rated as low. However, organizations may still face reputational damage and loss of customer trust in the event of a successful exploitation.
Given the CVSS score of 8.6 and the lack of known exploits, organizations should address this vulnerability in their priority patch cycle. The urgency is high, as attackers may discover methods of exploitation in the future.
The blast radius of this vulnerability can be significant, especially for organizations that rely heavily on the c-ares package in their applications. Thus, prompt action is required to mitigate the associated risks.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The affected versions of the c-ares package include all versions prior to 1.19.0. Additionally, the vulnerability impacts Red Hat's Enterprise Linux versions 8.0 and 9.0, as well as Fedora 36.
Mitigation & Remediation
To mitigate this vulnerability, organizations should upgrade to c-ares version 1.19.0 or later. If an immediate patch is not available, organizations may consider implementing input validation mechanisms to reduce the risk of exploit.
Moreover, implementing network controls to restrict access to vulnerable services may limit exposure. Organizations should also ensure continuous monitoring of their systems to detect any abnormal behavior that could indicate an attempted exploitation.
For effective validation of remediation, organizations should engage in penetration testing to ensure that the vulnerability has been effectively addressed.
Detection Guidance
Monitoring logs for indicators of exploitation attempts is crucial. Organizations should look for unusual patterns in server logs, particularly related to the ares_set_sortlist function. Behavioral anomalies such as unexpected application crashes or service downtime may also signal potential exploitation.
Network signatures that identify exploit attempts can enhance detection capabilities. Changes in system behavior or unplanned resource usage may warrant further investigation to rule out exploitation.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2022-4904 lies in its demonstration of the importance of input validation in software design. This vulnerability serves as a reminder for security teams to prioritize secure coding practices to prevent similar issues in the future.
The pattern of vulnerabilities arising from improper input validation highlights a critical area for focus in application security efforts. Security teams should conduct thorough security assessments to identify potential weaknesses in their software.
For further insights on vulnerability management, organizations can refer to the following resources: vulnerability management program design, penetration testing methodology, and security testing best practices to strengthen their defenses against future vulnerabilities.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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