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CVE-2021-39854— Adobe Acrobat Reader DC Null Pointer Dereference Could Lead To Application Denial-of-Service

Quick assessment

Affected
Adobe Acrobat Reader
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Adobe Acrobat和Adobe Reader都是美国奥多比（Adobe）公司的产品。Adobe Acrobat是一套PDF文件编辑和转换工具。Adobe Reader是一套PDF文档阅读软件。 Adobe Acrobat 和 Reader 存在代码问题漏洞，该漏洞源于NULL 指针取消引用错误。远程攻击者可以诱使受害者打开特制文件并执行拒绝服务 (DoS) 攻击。

AI Predicted 6.5 Difficulty: Easy EPSS 2.40% · P83

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution
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I. Basic Information for CVE-2021-39854

Vulnerability Information
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Vulnerability Title
Adobe Acrobat Reader DC Null Pointer Dereference Could Lead To Application Denial-of-Service
Source: CVE Program / CVE List V5
Vulnerability Description
Acrobat Reader DC versions 2021.005.20060 (and earlier), 2020.004.30006 (and earlier) and 2017.011.30199 (and earlier) are affected by a Null pointer dereference vulnerability. An unauthenticated attacker could leverage this vulnerability to achieve an application denial-of-service in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
空指针解引用
Source: CVE Program / CVE List V5
Vulnerability Title
Adobe Acrobat和Adobe Reader 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Adobe Acrobat和Adobe Reader都是美国奥多比（Adobe）公司的产品。Adobe Acrobat是一套PDF文件编辑和转换工具。Adobe Reader是一套PDF文档阅读软件。 Adobe Acrobat 和 Reader 存在代码问题漏洞，该漏洞源于NULL 指针取消引用错误。远程攻击者可以诱使受害者打开特制文件并执行拒绝服务 (DoS) 攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Adobe Acrobat Reader unspecified ~ DC 2021 July -

II. Public POCs for CVE-2021-39854

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III. Intelligence Information for CVE-2021-39854

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Vendor Advisories for CVE-2021-39854 (1)

Same Patch Batch · Adobe · 2021-09-29 · 41 CVEs total

CVE-2021-39831 7.8 HIGH Adobe FrameMaker PDF File Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability
CVE-2021-39863 7.8 HIGH Adobe Acrobat Reader DC Heap-based Buffer Overflow Vulnerability Could Lead To Arbitrary C
CVE-2021-40715 7.8 HIGH Adobe Premiere Pro 2021 EXR File Parsing Leads to Memory Corruption
CVE-2021-39843 7.8 HIGH Adobe Acrobat Reader XObject Out-of-Bound Write Vulnerability
CVE-2021-40708 7.3 HIGH Adobe Genuine Service Installer Privilege Escalation Vulnerability
CVE-2021-39856 6.5 MEDIUM Adobe Acrobat Reader DC NTLMv2 SSO Information Disclosure via LoadFile
CVE-2021-39855 6.5 MEDIUM Adobe Acrobat Reader DC NTLMv2 SSO Information Disclosure via src Parameter
CVE-2021-39845 6.1 MEDIUM Adobe Acrobat Reader Page Tree Node Recursive Stack Overflow
CVE-2021-39846 6.1 MEDIUM Adobe Acrobat Reader /Parent Property Recursive Stack Overflow
CVE-2021-39861 5.5 MEDIUM Adobe Acrobat Reader DC Catalog Plugin Out-of-Bounds Read Bug
CVE-2021-39851 5.5 MEDIUM Adobe Acrobat Reader DC Null Pointer Dereference Could Lead To Application Denial-of-Servi
CVE-2021-39852 5.5 MEDIUM Adobe Acrobat Reader DC Null Pointer Dereference Could Lead To Application Denial-of-Servi
CVE-2021-39850 5.5 MEDIUM Adobe Acrobat Reader DC Null Pointer Dereference Could Lead To Application Denial-of-Servi
CVE-2021-39849 5.5 MEDIUM Adobe Acrobat Reader DC Null Pointer Dereference Could Lead To Application Denial-of-Servi
CVE-2021-39860 5.5 MEDIUM Adobe Acrobat Reader DC Search Plugin Null Pointer Dereference
CVE-2021-39844 3.3 LOW Adobe Acrobat Reader CalRGB Out-of-Bounds Read Vulnerability
CVE-2021-39839 Adobe Acrobat Reader DC AcroForm getItemAt Use-After-Free Remote Code Execution Vulnerabil
CVE-2021-39836 Adobe Acrobat Reader DC AcroForm buttonGetIcon Use-After-Free Remote Code Execution Vulner
CVE-2021-39835 Adobe FrameMaker PDF File Parsing Use-After-Free Information Disclosure Vulnerability
CVE-2021-39837 Adobe Acrobat Reader DC AcroForm deleteItemAt Use-After-Free Remote Code Execution Vulnera

Showing top 20 of 41 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Acrobat Reader
Same vendor: Adobe
Same weakness: CWE-476

V. Comments for CVE-2021-39854

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