Vulnerability identifier: #VU36591

Vulnerability risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-3982

CWE-ID: CWE-787

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Atlantis Word Processor
Client/Desktop applications / Multimedia software

Vendor: Atlantis Security

Description

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

An exploitable arbitrary write vulnerability exists in the Word document parser of the Atlantis Word Processor 3.0.2.3 and 3.0.2.5. A specially crafted document can prevent Atlas from adding elements to an array that is indexed by a loop. When reading from this array, the application will use an out-of-bounds index which can result in arbitrary data being read as a pointer. Later, when the application attempts to write to said pointer, an arbitrary write will occur. This can allow an attacker to further corrupt memory, which leads to code execution under the context of the application. An attacker must convince a victim to open a document in order to trigger this vulnerability.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Atlantis Word Processor: 3.0.2.3 - 3.0.2.5

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External links
http://talosintelligence.com/vulnerability_reports/TALOS-2018-0650

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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.