htmldoc up to 1.9.11 html.cxx write_header buffer overflow

Summaryinfo

A vulnerability was found in htmldoc up to 1.9.11. It has been declared as critical. Impacted is the function write_header of the file /htmldoc/htmldoc/html.cxx. Executing a manipulation can lead to buffer overflow. The identification of this vulnerability is CVE-2021-33236. There is no exploit available.

Detailsinfo

A vulnerability has been found in htmldoc up to 1.9.11 and classified as problematic. This vulnerability affects the function write_header of the file /htmldoc/htmldoc/html.cxx. The manipulation with an unknown input leads to a buffer overflow vulnerability. The CWE definition for the vulnerability is CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. As an impact it is known to affect availability. CVE summarizes:

Buffer Overflow vulnerability in write_header in htmldoc through 1.9.11 allows attackers to casue a denial of service via /htmldoc/htmldoc/html.cxx:273.

The weakness was shared 08/16/2022 as 425. The advisory is shared for download at github.com. This vulnerability was named CVE-2021-33236 since 05/20/2021. 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.

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Name

• htmldoc

Version

• 1.9.0
• 1.9.1
• 1.9.2
• 1.9.3
• 1.9.4
• 1.9.5
• 1.9.6
• 1.9.7
• 1.9.8
• 1.9.9
• 1.9.10
• 1.9.11

CPE 2.3info

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CPE 2.2info

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