Remote code execution vulnerabilities in Atlantis Word Processor

1) Memory corruption

EUVDB-ID: #VU15983

Risk: High

CVSSv3.1: 8.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2018-4038

CWE-ID: CWE-120 - Buffer overflow

Exploit availability: No

Description

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

The weakness exists due to arbitrary write in the open document format parser, while trying to null-terminate a string. A remote attacker can trick the victim into opening a specially crafted Word document, pass an untrusted value as a length to a constructor, miscalculate a length and then use it to calculate the position to write a null byte, trigger memory corruption and execute arbitrary code under the context of the application.

Successful exploitation of the vulnerability may result in system compromise.

Mitigation

Update to version 3.2.10.1.

Vulnerable software versions

Atlantis Word Processor: 3.2.7.2

External links

http://www.talosintelligence.com/reports/TALOS-2018-0711

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. However, proof of concept for this vulnerability is available.

2) Out-of-bounds write

EUVDB-ID: #VU15984

Risk: High

CVSSv3.1: 8.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2018-4039

CWE-ID: CWE-787 - Out-of-bounds write

Exploit availability: No

Description

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

The weakness exists due to out-of-bounds write vulnerability in the PNG implementation. A remote attacker can trick the victim into opening a specially crafted Word document, trigger memory corruption and execute arbitrary code under the context of the application.

Successful exploitation of the vulnerability may result in system compromise.

Mitigation

Update to version 3.2.10.1.

Vulnerable software versions

Atlantis Word Processor: 3.2.7.2

External links

http://www.talosintelligence.com/reports/TALOS-2018-0712

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. However, proof of concept for this vulnerability is available.

3) Use of uninitialized variable

EUVDB-ID: #VU15985

Risk: High

CVSSv3.1: 8.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2018-4040

CWE-ID: CWE-457 - Use of Uninitialized Variable

Exploit availability: No

Description

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

The weakness exists due to uninitialized pointer in the rich text format parser. A remote attacker can trick the victim into opening a specially crafted Word document, cause certain RTF tokens to dereference a pointer that has been uninitialized and then write to it and execute arbitrary code under the context of the application.

Successful exploitation of the vulnerability may result in system compromise.

Mitigation

Update to version 3.2.10.1.

Vulnerable software versions

Atlantis Word Processor: 3.2.7.2

External links

http://www.talosintelligence.com/reports/TALOS-2018-0713

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. However, proof of concept for this vulnerability is available.