CVE-2019-19630 : What You Need to Know
Learn about CVE-2019-19630, a vulnerability in HTMLDOC 1.9.7 that allows a stack-based buffer overflow. Find out the impact, affected systems, exploitation method, and mitigation steps.
HTMLDOC 1.9.7 allows a stack-based buffer overflow in the hd_strlcpy() function in string.c when called from render_contents in ps-pdf.cxx via a crafted HTML document.
Understanding CVE-2019-19630
A crafted HTML document can trigger a stack-based buffer overflow in the hd_strlcpy() function within the rendered contents of HTMLDOC 1.9.7.
What is CVE-2019-19630?
- The vulnerability occurs in the hd_strlcpy() function within HTMLDOC 1.9.7 when called from render_contents in ps-pdf.cxx.
The Impact of CVE-2019-19630
- An attacker could exploit this vulnerability by enticing a user to open a malicious HTML document, leading to a stack-based buffer overflow.
Technical Details of CVE-2019-19630
HTMLDOC 1.9.7 is susceptible to a stack-based buffer overflow in the hd_strlcpy() function when triggered by a crafted HTML document.
Vulnerability Description
- The vulnerability arises in the hd_strlcpy() function within HTMLDOC 1.9.7 when called from render_contents in ps-pdf.cxx.
Affected Systems and Versions
- Product: HTMLDOC 1.9.7
- Vendor: N/A
- Version: N/A
Exploitation Mechanism
- The vulnerability can be exploited through a specially crafted HTML document that triggers the stack-based buffer overflow.
Mitigation and Prevention
To address CVE-2019-19630, follow these steps:
Immediate Steps to Take
- Update HTMLDOC to a patched version that addresses the buffer overflow.
- Avoid opening untrusted HTML documents from unknown sources.
Long-Term Security Practices
- Regularly update software and apply security patches promptly.
- Implement proper input validation and sanitization to prevent buffer overflows.
Patching and Updates
- Stay informed about security updates for HTMLDOC and apply them as soon as they are available.