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Multiple Vulnerabilities in Adobe Products Could Allow For Arbitrary Code Execution

MS-ISAC ADVISORY NUMBER:

2021-105

DATE(S) ISSUED:

08/18/2021

OVERVIEW:

Multiple vulnerabilities have been discovered in Adobe Media Encoder, Adobe Bridge, Adobe Photoshop, Adobe XMP Toolkit SDK, and Adobe Captivate, the most severe of which could allow for arbitrary code execution.

  • Adobe Media Encoder is software that provides media content over the internet
  • Adobe Bridge is a digital asset management application
  • Adobe Photoshop is a graphics editor
  • Adobe XMP Toolkit SDK is a development kit for Adobe’s Extensible Metadata Platform
  • Adobe Captivate is a tool for creating e-learning content
    Successful exploitation of the most severe of these vulnerabilities could allow for arbitrary code execution in the context of 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 currently no reports of these vulnerabilities being exploited in the wild.

SYSTEMS AFFECTED:

  • Adobe Captivate 11.5.5 and earlier versions
  • Adobe XMP-Toolkit-SDK 2020.1 and earlier versions
  • Adobe Photoshop 2020 21.2.10 and earlier versions
  • Adobe Photoshop 2021 22.4.3 and earlier versions
  • Adobe Bridge 11.1 and earlier versions
  • Adobe Media Encoder 15.4 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 Media Encoder, Adobe Bridge, Adobe Photoshop, Adobe XMP Toolkit SDK, and Adobe Captivate, the most severe of which could allow for arbitrary code execution. Details of these vulnerabilities are as follows:

  • Eleven arbitrary code execution vulnerabilities exist when Adobe accesses a memory location after the end of a buffer (CVE-2021-36046, CVE-2021-36049, CVE-2021-36052, CVE-2021-36059, CVE-2021-36067, CVE-2021-36068, CVE-2021-36069, CVE-2021-36070, CVE-2021-36076, CVE-2021-36077, CVE-2021-36078)
  • Six arbitrary code execution vulnerabilities exist due a to a buffer overflow (CVE-2021-36050, CVE-2021-36051, CVE-2021-36054, CVE-2021-36057, CVE-2021-36065, CVE-2021-36073, CVE-2021-36075)
  • Four application denial-of-service vulnerabilities exist (CVE-2021-36053, CVE-2021-36054, CVE-2021-36055, CVE-2021-36056)
  • Two arbitrary code execution vulnerabilities exist due to improper input validation (CVE-2021-36047, CVE-2021-36048)
  • Two arbitrary code execution vulnerabilities exist due to an out-of-bounds write (CVE-2021-36066, CVE-2021-36072)
  • One arbitrary code execution vulnerability exists due to a buffer underwrite (CVE-2021-36064)
  • One arbitrary code execution vulnerability exists due to an integer overflow (CVE-2021-36058)
  • One arbitrary code execution vulnerability exists due to an out-of-bounds read (CVE-2021-36079)
  • One memory leak vulnerability exists due to an out-of-bounds read (CVE-2021-36074)
  • One privilege escalation vulnerability exists when Adobe Captivate creates a temporary file in a directory with incorrect permissions (CVE-2021-36002)
  • Two arbitrary file system read vulnerabilities exist due to an out-of-bounds read (CVE-2021-36071, CVE-2021-36079)

Successful exploitation of the most severe of these vulnerabilities could allow for arbitrary code execution in the context of 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:

  • Apply appropriate patches provided by Adobe to vulnerable systems immediately after appropriate testing.
  • Run all software as a non-privileged user (one without administrative privileges) to diminish the effects of a successful attack.
  • 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:

CVE:
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36002 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36045 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36046 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36047 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36048 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36049 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36050 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36051 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36052 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36053 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36054 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36055 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36056 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36057 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36058 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36059 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36064 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36065 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36066 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36067 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36068 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36069 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36070 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36071 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36072 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36073 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36074 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36075 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36076 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36077 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36078 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36079

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