Security Alert: Critical Vulnerabilities in Adobe Acrobat and Adobe Reader - Update Now

May 13, 2020

by Information Security Services

MS-ISAC CYBERSECURITY ADVISORY

 

MS-ISAC ADVISORY NUMBER:

2020-065

DATE(S) ISSUED:

05/12/2020

SUBJECT:

Multiple Vulnerabilities in Adobe Acrobat and Adobe Reader Could Allow for Arbitrary Code Execution (APSB20-24)

OVERVIEW:

Multiple vulnerabilities have been discovered in Adobe Acrobat and Adobe Reader, the most severe of which could allow for arbitrary code execution. Adobe Acrobat is a family of software developed by Adobe Inc. to view, create, manipulate, print, and manage files in PDF format. Adobe Reader is the free version within the Adobe Acrobat family of software. Successful exploitation of the most severe of these vulnerabilities could result in arbitrary code execution. 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. If this application has been configured to have fewer user rights on the system, exploitation of the most severe of these vulnerabilities could have less impact than if it was configured with administrative rights.

 

THREAT INTELLIGENCE:

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

 

SYSTEMS AFFECTED:

  • Acrobat DC 2020.006.20042 and earlier versions 
  • Acrobat Reader DC 2020.006.20042 and earlier versions 
  • Acrobat 2017 2017.011.30166 and earlier versions 
  • Acrobat Reader 2017 2017.011.30166 and earlier versions
  • Acrobat 2015 2015.006.30518 and earlier versions
  • Acrobat Reader 2015 2015.006.30518 and earlier versions

 

RISK:

Government:

  • Large and medium government entities: High
  • Small government entities: Medium

Businesses:

  • Large and medium business entities: High
  • Small business entities: Medium

Home users: Low

 

TECHNICAL SUMMARY:

Multiple vulnerabilities have been discovered in Adobe Acrobat and Adobe Reader, the most severe of which could allow for arbitrary code execution. Details of the vulnerabilities are as follows:

  • One heap overflow vulnerability that could cause arbitrary code execution. (CVE-2020-9612)
  • One null pointer vulnerability that could cause an application denial-of-service. (CVE-2020-9610)
  • One race condition vulnerability that could cause bypassing of security features. (CVE-2020-9615)
  • Two memory out of bonds write vulnerabilities that could cause arbitrary code execution. (CVE-2020-9597, CVE-2020-9594)
  • Four security bypass vulnerabilities that could bypass security features. (CVE-2020-9614, CVE-2020-9613, CVE-2020-9596, CVE-2020-9592)
  • One stack exhaustion vulnerability that could cause an application denial-of-service. (CVE-2020-9611)
  • Seven memory out of bounds read vulnerabilities that could cause information disclosure. (CVE-2020-9609, CVE-2020-9608, CVE-2020-9603, CVE-2020-9602, CVE-2020-9601, CVE-2020-9600, CVE-2020-9599)
  • Two buffer error vulnerabilities that could cause arbitrary code execution. (CVE-2020-9605, CVE-2020-9604)
  • Two use-after-free vulnerabilities that could cause arbitrary code execution. (CVE-2020-9607, CVE-2020-9606)
  • Three invalid memory access vulnerabilities that could cause information disclosure. (CVE-2020-9598, CVE-2020-9595, CVE-2020-9593)

 

Successful exploitation of the most severe of these vulnerabilities could result in arbitrary code execution. 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. If this application has been configured to have fewer user rights on the system, exploitation of the most severe of these vulnerabilities could have less impact than if it was configured with administrative rights.

 

RECOMMENDATIONS:

We recommend the following actions be taken:

  • Install the updates provided by Adobe 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

 

REFERENCES:

Adobe: https://helpx.adobe.com/security/products/acrobat/apsb20-24.html

 

CVE:

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