SB2021071320 - Multiple vulnerabilities in Adobe Acrobat and Reader

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Main Vulnerability Database SB2021071320

SB2021071320 - Multiple vulnerabilities in Adobe Acrobat and Reader

Published: July 13, 2021 Updated: October 13, 2021

Security Bulletin ID SB2021071320
CSH Severity
High
Patch available
YES
Number of vulnerabilities 19
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

High 58% Medium 11% Low 32%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 19 vulnerabilities.


1) Out-of-bounds read (CVE-ID: CVE-2021-35988)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear


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

The vulnerability exists due to a boundary condition. A remote attacker can create a specially crafted PDF file, trick the victim into opening it, trigger out-of-bounds read error and read contents of memory on the system.


2) Heap-based buffer overflow (CVE-ID: CVE-2021-28638)

CWE-ID: CWE-122 - Heap-based Buffer Overflow

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber


The vulnerability allows a remote attacker to compromise the affected system

The vulnerability exists due to a boundary condition when processing PDF files. A remote attacker can trick the victim to open a specially crafted PDF document, trigger a heap-based buffer overflow and execute arbitrary code on the system.


3) Use-after-free (CVE-ID: CVE-2021-28635)

CWE-ID: CWE-416 - Use After Free

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber


The vulnerability allows a remote attacker to compromise the affected system

The vulnerability exists due to a boundary condition when processing PDF files. A remote attacker can trick the victim to open a specially crafted PDF document, trigger a use-after-free error and execute arbitrary code on the system.


4) Use-after-free (CVE-ID: CVE-2021-35981)

CWE-ID: CWE-416 - Use After Free

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber


The vulnerability allows a remote attacker to compromise the affected system

The vulnerability exists due to a boundary condition when processing PDF files. A remote attacker can trick the victim to open a specially crafted PDF document, trigger a use-after-free error and execute arbitrary code on the system.


5) Use-after-free (CVE-ID: CVE-2021-35983)

CWE-ID: CWE-416 - Use After Free

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber


The vulnerability allows a remote attacker to compromise the affected system

The vulnerability exists due to a boundary condition when processing PDF files. A remote attacker can trick the victim to open a specially crafted PDF document, trigger a use-after-free error and execute arbitrary code on the system.


6) Command injection (CVE-ID: CVE-2021-28634)

CWE-ID: CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to improper input validation. A local user can execute arbitrary OS commands and escalate privileges on the system.


7) Insecure DLL loading (CVE-ID: CVE-2021-28636)

CWE-ID: CWE-427 - Uncontrolled Search Path Element

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber


The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to the application loads DLL libraries in an insecure manner. A remote attacker can place a specially crafted .dll file on a remote SMB fileshare, trick the victim into opening a file, associated with the vulnerable application, and execute arbitrary code on victim's system.


8) NULL pointer dereference (CVE-ID: CVE-2021-35984)

CWE-ID: CWE-476 - NULL Pointer Dereference

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error. A remote attacker can trick the victim to open a specially crafted file and perform a denial of service (DoS) attack.


9) NULL pointer dereference (CVE-ID: CVE-2021-35985)

CWE-ID: CWE-476 - NULL Pointer Dereference

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error. A remote attacker can trick the victim to open a specially crafted file and perform a denial of service (DoS) attack.


10) Type confusion (CVE-ID: CVE-2021-35986)

CWE-ID: CWE-843 - Type confusion

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber


The vulnerability allows a remote attacker to compromise the affected system

The vulnerability exists due to a boundary condition within the getAnnots method when processing PDF files. A remote attacker can trick the victim to open a specially crafted PDF document, trigger a type confusion error and execute arbitrary code on the system.


11) Out-of-bounds read (CVE-ID: CVE-2021-35987)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear


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

The vulnerability exists due to a boundary condition. A remote attacker can create a specially crafted PDF file, trick the victim into opening it, trigger out-of-bounds read error and read contents of memory on the system.


12) Out-of-bounds read (CVE-ID: CVE-2021-28637)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear


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

The vulnerability exists due to a boundary condition. A remote attacker can create a specially crafted PDF file, trick the victim into opening it, trigger out-of-bounds read error and read contents of memory on the system.


13) Out-of-bounds write (CVE-ID: CVE-2021-28642)

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

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber


The vulnerability allows a remote attacker to compromise the affected system

The vulnerability exists due to a boundary condition when processing PDF files. A remote attacker can trick the victim to open a specially crafted PDF document, trigger an Out-of-bounds write error and execute arbitrary code on the system.


14) Use-after-free (CVE-ID: CVE-2021-28639)

CWE-ID: CWE-416 - Use After Free

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber


The vulnerability allows a remote attacker to compromise the affected system

The vulnerability exists due to a boundary condition when processing PDF files. A remote attacker can trick the victim to open a specially crafted PDF document, trigger a use-after-free error and execute arbitrary code on the system.


15) Use-after-free (CVE-ID: CVE-2021-28641)

CWE-ID: CWE-416 - Use After Free

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber


The vulnerability allows a remote attacker to compromise the affected system

The vulnerability exists due to a boundary condition when processing PDF files. A remote attacker can trick the victim to open a specially crafted PDF document, trigger a use-after-free error and execute arbitrary code on the system.


16) Type confusion (CVE-ID: CVE-2021-28643)

CWE-ID: CWE-843 - Type confusion

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber


The vulnerability allows a remote attacker to compromise the affected system

The vulnerability exists due to a boundary condition when processing PDF files. A remote attacker can trick the victim to open a specially crafted PDF document, trigger a type confusion error and execute arbitrary code on the system.


17) Use-after-free (CVE-ID: CVE-2021-28640)

CWE-ID: CWE-416 - Use After Free

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber


The vulnerability allows a remote attacker to compromise the affected system

The vulnerability exists due to a boundary condition when processing PDF files. A remote attacker can trick the victim to open a specially crafted PDF document, trigger a use-after-free error and execute arbitrary code on the system.


18) Path traversal (CVE-ID: CVE-2021-28644)

CWE-ID: CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows a remote attacker to overwrite arbitrary files on the system.

The vulnerability exists due to an input validation error when processing PDF files. A remote attacker can trick the victim to open a specially crafted PDF document and overwrite arbitrary files on the system.


19) Path traversal (CVE-ID: CVE-2021-35980)

CWE-ID: CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows a remote attacker to overwrite arbitrary files on the system.

The vulnerability exists due to an input validation error when processing PDF files. A remote attacker can trick the victim to open a specially crafted PDF document and overwrite arbitrary files on the system.


Remediation

Install update from vendor's website.

References