HTMLDOC 1.9.7 string.c hd_strlcpy HTML Document out-of-bounds write

Summaryinfo

A vulnerability, which was classified as critical, was found in HTMLDOC 1.9.7. This affects the function hd_strlcpy of the file string.c. Such manipulation as part of HTML Document leads to out-of-bounds write. This vulnerability is uniquely identified as CVE-2019-19630. Local access is required to approach this attack. No exploit exists.

Detailsinfo

A vulnerability, which was classified as critical, has been found in HTMLDOC 1.9.7. Affected by this issue is the function hd_strlcpy of the file string.c. The manipulation as part of a HTML Document leads to a out-of-bounds write vulnerability. Using CWE to declare the problem leads to CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. Impacted is confidentiality, integrity, and availability. CVE summarizes:

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.

The weakness was disclosed 12/08/2019. This vulnerability is handled as CVE-2019-19630 since 12/08/2019. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

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• HTMLDOC

Version

• 1.9.7

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