CVE-2021-30470 : What You Need to Know
Learn about CVE-2021-30470, a vulnerability in PoDoFo 0.9.7 that may result in a stack overflow due to uncontrolled recursive calls in specific functions. Understand the impact, technical details, and mitigation steps.
PoDoFo 0.9.7 contains a vulnerability that could lead to a stack overflow due to an uncontrolled recursive call in certain functions.
Understanding CVE-2021-30470
This CVE pertains to a flaw in PoDoFo 0.9.7, specifically related to recursive function calls within PdfTokenizer functions.
What is CVE-2021-30470?
A flaw in PoDoFo 0.9.7 could trigger a stack overflow by a recursive call in PdfTokenizer::ReadArray(), PdfTokenizer::GetNextVariant(), and PdfTokenizer::ReadDataType() functions.
The Impact of CVE-2021-30470
The vulnerability could allow an attacker to execute arbitrary code or crash the application, potentially leading to denial of service.
Technical Details of CVE-2021-30470
This section dives deeper into the vulnerability details.
Vulnerability Description
The flaw allows for an uncontrolled recursive call that can overwhelm the stack, leading to a potential crash.
Affected Systems and Versions
PoDoFo 0.9.7 is confirmed to be impacted by this vulnerability.
Exploitation Mechanism
By triggering a recursive call within the mentioned PdfTokenizer functions, an attacker can exploit this vulnerability.
Mitigation and Prevention
Protecting systems from CVE-2021-30470 requires immediate action and long-term security measures.
Immediate Steps to Take
Users should update to a patched version or apply relevant security fixes to mitigate the risk.
Long-Term Security Practices
Regularly updating software and implementing secure coding practices can enhance overall security posture.
Patching and Updates
Stay informed about patches and updates released by PoDoFo to address this vulnerability.