Multiple Vulnerabilities in Adobe Products Could Allow for Arbitrary Code Execution (APSB20-14, 16, 17)

MS-ISAC ADVISORY NUMBER:

DATE(S) ISSUED:

OVERVIEW:

Multiple vulnerabilities have been discovered in Adobe Photoshop, ColdFusion, and Bridge that could allow for arbitrary code execution. Adobe Photoshop is a graphics editor program. Adobe Bridge is a file management application that manages files across multiple Adobe programs. Adobe ColdFusion is a rapid web-application development platform used to create and maintain web applications. Successful exploitation of the most severe of these vulnerabilities could result in an attacker gaining the same privileges as the logged on user. Depending on the privileges associated with the user, an attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than those who operate with administrative user rights.

THREAT INTELLIGENCE:

There are no reports of these vulnerabilities being exploited in the wild.

SYSTEMS AFFECTED:

• Adobe Bridge version 10.0 and earlier versions
• Adobe ColdFusion 2016 Update 13 and earlier versions
• Adobe ColdFusion 2018 Update 7 and earlier versions
• Adobe Photoshop CC 2019 version 20.0.8 and earlier versions
• Adobe Photoshop 2020 version 21.1 and earlier versions

RISK:

TECHNICAL SUMMARY:

Multiple vulnerabilities have been discovered in Adobe Photoshop, ColdFusion, and Bridge that could allow for arbitrary code execution. The vulnerabilities are as follows:

• Out-of-bounds write vulnerability could allow for Arbitrary Code Execution. (CVE-2020-9551)
• Heap-based buffer overflow vulnerability could allow for Arbitrary Code Execution. (CVE-2020-9552)
• Remote file read vulnerability could allow for Arbitrary File Read from the ColdFusion install directory. (CVE-2020-3761)
• File inclusion vulnerability could allow for Arbitrary Code Execution of files located in the webroot or its subdirectory (CVE-2020-3794)
• Heap corruption vulnerability that could allow for Arbitrary Code Execution. (CVE-2020-3783)
• Multiple Memory corruption vulnerabilities that could allow for Arbitrary Code Execution. (CVE-2020-3784, CVE-2020-3785, CVE-2020-3786, CVE-2020-3787, CVE-2020-3788, CVE-2020-3789, CVE-2020-3790)
• Multiple Out-of-bounds read vulnerabilities that could allow for Information Disclosure. (CVE-2020-3771, CVE-2020-3777, CVE-2020-3778, CVE-2020-3781, CVE-2020-3782, CVE-2020-3791)
• Multiple Out-of-bounds write vulnerabilities that could allow for Arbitrary Code Execution. (CVE-2020-3773, CVE-2020-3779)
• Multiple Buffer errors vulnerabilities that could allow for Arbitrary Code Execution. (CVE-2020-3770, CVE-2020-3772, CVE-2020-3774, CVE-2020-3775, CVE-2020-3776, CVE-2020-3780)

Successful exploitation of the most severe of these vulnerabilities could result in an attacker gaining the same privileges as the logged on user. Depending on the privileges associated with the user, an attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than those who operate with administrative user rights.

RECOMMENDATIONS:

We recommend the following actions be taken:

• Install updates provided by Adobe and related Coldfusion JDK/JRE versions immediately after appropriate testing.
• Run all software as a non-privileged user (one without administrative privileges) to diminish the effects of a successful attack.
• Remind users not to visit websites or follow links provided by unknown or untrusted sources.
• Inform and educate users regarding the threats posed by hypertext links contained in emails or attachments especially from un-trusted sources.
• Apply the Principle of Least Privilege to all systems and services.

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