Multiple vulnerabilities in Microsoft Outlook

1) Improper input validation

EUVDB-ID: #VU15856

Risk: High

CVSSv3.1: 8.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-8582

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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

The vulnerability exists due to an error when parsing rule export files. A remote attacker can send a specially crafted email message, trick the victim into opening the email and importing an attached .rwz (rule export) file and execute arbitrary code with elevated privileges.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Microsoft Outlook: 2010 Service Pack 2 - 2016

Microsoft Office: 365 ProPlus - 2019

External links

http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8582

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to visit a specially crafted website or open a file.

Is there known malware, which exploits this vulnerability?

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

2) Memory corruption

EUVDB-ID: #VU15858

Risk: High

CVSSv3.1: 8.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-8524

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

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

The vulnerability exists due to an error when handling objects in memory. A remote attacker can send a specially crafted email message containing malicious file, trick the victim into opening it, trigger memory corruption and execute arbitrary code with elevated privileges.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Microsoft Outlook: 2010 Service Pack 2 - 2016

Microsoft Office: 365 ProPlus - 2019

External links

http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8524

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to visit a specially crafted website or open a file.

Is there known malware, which exploits this vulnerability?

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

3) Memory corruption

EUVDB-ID: #VU15864

Risk: High

CVSSv3.1: 8.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-8576

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

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

The vulnerability exists due to an error when handling objects in memory. A remote attacker can send a specially crafted email message containing malicious file, trick the victim into opening it, trigger memory corruption and execute arbitrary code with elevated privileges.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Microsoft Outlook: 2010 Service Pack 2 - 2016

Microsoft Office: 365 ProPlus - 2019

External links

http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8576

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to visit a specially crafted website or open a file.

Is there known malware, which exploits this vulnerability?

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

4) Memory corruption

EUVDB-ID: #VU15865

Risk: High

CVSSv3.1: 8.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-8522

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

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

The vulnerability exists due to an error when handling objects in memory. A remote attacker can send a specially crafted email message containing malicious file, trick the victim into opening it, trigger memory corruption and execute arbitrary code with elevated privileges.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Microsoft Outlook: 2010 Service Pack 2 - 2016

Microsoft Office: 365 ProPlus - 2019

External links

http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8576

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to visit a specially crafted website or open a file.

Is there known malware, which exploits this vulnerability?

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

5) Information disclosure

EUVDB-ID: #VU15869

Risk: Low

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-8579

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

The vulnerability allows a remote attacker to obtain potentially sensitive information on the target system.

The weakness exists due to an error when attaching files to Outlook messages. A remote attacker can attach a file as a link to an email, ignore the default organizational setting and share attached files such that they are accessible by anonymous users where they should be restricted to specific users.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Microsoft Office: 365 ProPlus - 2019

External links

http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8579

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to visit a specially crafted website or open a file.

Is there known malware, which exploits this vulnerability?

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

6) Information disclosure

EUVDB-ID: #VU15871

Risk: Low

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-8558

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to an error when Microsoft Outlook fails to respect "Default link type" settings configured via the SharePoint Online Admin Center. A remote attacker can share anonymously-accessible links to other users via email where these links are intended to be accessed only by specific users.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Microsoft Office: 365 ProPlus - 2019

External links

http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8558

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to visit a specially crafted website or open a file.

Is there known malware, which exploits this vulnerability?

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