Vulnerability identifier: #VU49297

Vulnerability risk: High

CVSSv3.1: 8.1 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:U/RC:C]

CVE-ID: CVE-2020-13545

CWE-ID: CWE-196

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
TextMaker 2021
Client/Desktop applications / Office applications

Vendor: SoftMaker

Description

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to unsigned to signed conversion error in the TextMaker document parsing functionality within record 0x003f. A remote attacker can trick a victim to open a specially crafted document and cause the document parser to miscalculate a length used to allocate a buffer, leading to a heap-based memory corruption.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

TextMaker 2021: revision 1014

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External links
http://www.talosintelligence.com/vulnerability_reports/TALOS-2020-1162

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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.