CVE-2023-28322 is identified as an information disclosure vulnerability affecting curl versions prior to 8.1.0. The vulnerability arises during HTTP(S) transfers when libcurl may incorrectly utilize the read callback (`CURLOPT_READFUNCTION`) to request data for transmission, despite the `CURLOPT_POSTFIELDS` option being set. This behavior can lead to applications sending incorrect data or accessing freed memory unexpectedly during subsequent requests.
The severity of this vulnerability is classified as low, with a CVSS score of 3.7. Organizations utilizing affected versions of curl should be aware of the associated risks, particularly in scenarios where sensitive data may inadvertently be shared or mishandled.
Given that there is no confirmed public exploit available and the vulnerability is not included in the Known Exploited Vulnerabilities (KEV) catalog, the immediate urgency for patching is relatively lower. However, organizations should still prioritize addressing the issue in their regular maintenance and patch cycles.
To mitigate the risk associated with CVE-2023-28322, organizations are advised to update to curl version 8.1.0 or later, ensuring that they are operating with the most secure version available.
Vulnerability Details
CVE-2023-28322 is a low severity information disclosure vulnerability in the curl library. The flaw exists due to a mismanagement of the read callback when transitioning between HTTP methods. If a handle is reused after a PUT request that employed the read callback, the application may behave unexpectedly during a subsequent POST request.
The CVSS score of 3.7 indicates a low-impact vulnerability, where the attack vector is network-based, requiring no user interaction or privileges, but exhibiting high attack complexity. This situation may lead to low confidentiality impact, although integrity and availability impacts are not present.
The vulnerability affects multiple products and components, including curl, macOS, and various NetApp firmware versions. The publication date of this CVE is May 26, 2023.
Technical Analysis
The root cause of CVE-2023-28322 is an incorrect handling of the read callback mechanism within libcurl when switching from a PUT to a POST request. This flaw can lead to unintended data being sent or memory being accessed after it has been freed, potentially leading to application misbehavior.
The attack vector is classified as network-based, allowing remote exploitation without the need for user interaction. The attack complexity is high, which may require a sophisticated understanding of the curl library's operations and the specific circumstances under which the vulnerability may be triggered.
No privileges are required for exploitation, and user interaction is not necessary. The impacts on confidentiality are low, with no effects on integrity or availability.
Risk & Impact Analysis
Organizations utilizing affected versions of curl may face risks associated with unintended data exposure. The flaw could allow sensitive information to be leaked during HTTP transfers, which poses a real-world threat in environments where data confidentiality is paramount.
The potential blast radius includes any application relying on the curl library for HTTP(S) transfers. As the attack complexity is high, exploitation may not be straightforward, but the consequences of a successful attack could be significant, particularly for applications handling sensitive data.
Given the CVSS score of 3.7, organizations should schedule remediation of this vulnerability in their regular maintenance cycles. While the risk is assessed as low, it nonetheless warrants attention to prevent possible data breaches.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The following versions are affected by CVE-2023-28322:
1. curl: All versions prior to 8.1.0 2. Fedora: Versions 37 and 38 3. macOS: Versions from 11.0 up to 11.7.8, 12.0 up to 12.6.7, and 13.0 up to 13.4 4. NetApp: clustered_data_ontap and ontap_antivirus_connector
Mitigation & Remediation
Organizations should prioritize upgrading to the latest version of curl to mitigate the risk associated with CVE-2023-28322. The recommended version is 8.1.0 or later.
In cases where immediate patching is not possible, consider implementing network controls to limit access to affected services. Regularly review logs for any unexpected behavior that may indicate exploitation attempts.
Monitoring for behavioral anomalies and ensuring that applications do not reuse handles inappropriately can also help mitigate potential risks.
For further guidance on securing your applications, organizations may consider engaging in penetration testing to identify and remediate similar vulnerabilities.
Detection Guidance
To detect potential exploitation of CVE-2023-28322, organizations should monitor logs for unusual API requests or unexpected data being transmitted. Look for instances where curl is used inappropriately, especially in cases where handles are reused.
Behavioral anomalies in applications should be investigated, particularly if unexpected data is found in outgoing network traffic. Implementing network signatures can also aid in identifying potential exploitation attempts.
AppSecure Threat Intelligence Insight
CVE-2023-28322 highlights the need for security teams to maintain vigilance regarding library usage and potential vulnerabilities in third-party components. The incident underscores the importance of regular updates and adherence to secure coding practices.
Organizations should incorporate vulnerability management programs to ensure timely identification and remediation of flaws, such as those illustrated by this CVE. This includes regular security assessments and engaging in vulnerability management to assess and fortify defenses.
As software development practices evolve, it is crucial to incorporate security into the development lifecycle, ensuring that vulnerabilities like CVE-2023-28322 are identified before they can be exploited.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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