Vulnerability identifier: #VU54039

Vulnerability risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-26252

CWE-ID: CWE-122

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
HTMLDOC
Web applications / Modules and components for CMS

Vendor: Michael R Sweet

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error within the pspdf_prepare_page() function ps-pdf.cxx. A remote attacker can pass specially crafted JPEG image to the application, trigger heap-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

HTMLDOC: 1.9 - 1.9.11

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External links
http://github.com/michaelrsweet/htmldoc/issues/412
http://github.com/michaelrsweet/htmldoc/commit/369b2ea1fd0d0537ba707f20a2f047b6afd2fbdc

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.