CVE-2021-38614 : Exploit Details and Defense Strategies

Polipo through 1.1.1, when NDEBUG is used, allows a heap-based buffer overflow during parsing of a Range header. This vulnerability impacts products that are no longer supported by the maintainer. Learn more about the impact, technical details, and mitigation steps related to CVE-2021-38614.

Understanding CVE-2021-38614

CVE-2021-38614 is a vulnerability in Polipo through version 1.1.1 that can result in a heap-based buffer overflow when debugging functionality (NDEBUG) is utilized. This issue poses a risk to systems that are no longer receiving support or updates.

What is CVE-2021-38614?

CVE-2021-38614 is a specific vulnerability in Polipo that arises when parsing a Range header, potentially leading to a heap-based buffer overflow. Notably, this vulnerability only affects systems that are no longer maintained by the developer.

The Impact of CVE-2021-38614

The impact of CVE-2021-38614 can be severe, allowing threat actors to exploit the buffer overflow to execute arbitrary code or crash the affected application. Systems running unsupported versions of Polipo are particularly at risk.

Technical Details of CVE-2021-38614

CVE-2021-38614 manifests as a heap-based buffer overflow triggered specifically during the parsing of a Range header. This can be exploited by attackers to achieve remote code execution or denial of service on vulnerable systems.

Vulnerability Description

The vulnerability in Polipo through version 1.1.1 arises due to improper handling of user-supplied input in the Range header parsing, leading to the buffer overflow condition.

Affected Systems and Versions

Systems running Polipo versions up to and including 1.1.1 are susceptible to CVE-2021-38614. However, this vulnerability primarily impacts products that are no longer actively supported by the maintainer.

Exploitation Mechanism

Attackers can exploit CVE-2021-38614 by sending specially crafted Range headers to the vulnerable Polipo server, triggering the heap-based buffer overflow and potentially gaining unauthorized access to the system.

Mitigation and Prevention

To mitigate the risks associated with CVE-2021-38614, immediate actions and long-term security practices are essential.

Immediate Steps to Take

Organizations should identify systems running unsupported versions of Polipo and consider upgrading to a supported release. Additionally, network segmentation and access controls can help minimize exposure to potential attacks.

Long-Term Security Practices

Maintaining an up-to-date software inventory, implementing patch management procedures, and monitoring security mailing lists for relevant updates are integral to long-term security hygiene.

Patching and Updates

Users are advised to apply patches or updates provided by Polipo or consider transitioning to alternative software solutions to address the CVE-2021-38614 vulnerability effectively.