CVE-2019-9687 : Vulnerability Insights and Analysis
Learn about CVE-2019-9687, a heap-based buffer overflow vulnerability in PoDoFo 0.9.6, allowing remote attackers to execute arbitrary code. Find mitigation steps and long-term security practices here.
PoDoFo 0.9.6 has a heap-based buffer overflow vulnerability in PdfString::ConvertUTF16toUTF8 in base/PdfString.cpp.
Understanding CVE-2019-9687
In base/PdfString.cpp, a heap-based buffer overflow exists in PdfString::ConvertUTF16toUTF8 within the PoDoFo 0.9.6 code.
What is CVE-2019-9687?
The vulnerability in PoDoFo 0.9.6 allows attackers to trigger a buffer overflow by manipulating UTF-16 strings, potentially leading to arbitrary code execution.
The Impact of CVE-2019-9687
This vulnerability could be exploited by a remote attacker to execute arbitrary code on the target system, leading to a compromise of the affected system's integrity and confidentiality.
Technical Details of CVE-2019-9687
PoDoFo 0.9.6 is susceptible to a heap-based buffer overflow due to improper handling of UTF-16 strings.
Vulnerability Description
The vulnerability lies in the PdfString::ConvertUTF16toUTF8 function within the base/PdfString.cpp file, allowing an attacker to overflow the buffer.
Affected Systems and Versions
- Product: PoDoFo 0.9.6
- Vendor: PoDoFo
- Versions: All versions of PoDoFo 0.9.6 are affected.
Exploitation Mechanism
Attackers can exploit this vulnerability by crafting a malicious PDF file containing specially crafted UTF-16 strings, which upon processing by the vulnerable PoDoFo library, triggers the buffer overflow.
Mitigation and Prevention
It is crucial to take immediate steps to mitigate the risks posed by CVE-2019-9687.
Immediate Steps to Take
- Update PoDoFo to a non-vulnerable version if available.
- Avoid opening PDF files from untrusted or unknown sources.
- Implement network security measures to prevent unauthorized access to vulnerable systems.
Long-Term Security Practices
- Regularly update software and libraries to patch known vulnerabilities.
- Conduct security assessments and audits to identify and address potential weaknesses.
Patching and Updates
- Check for security advisories from PoDoFo and apply patches promptly to secure the system against known vulnerabilities.