Adobe Acrobat Reader use after free

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
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CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.1$0-$5k0.00

Summaryinfo

A vulnerability marked as critical has been reported in Adobe Acrobat Reader up to 2017.011.30197/2020.004.30005/2021.005.20054. Affected by this vulnerability is an unknown functionality. Performing a manipulation results in use after free. This vulnerability is reported as CVE-2021-28635. The attack requires a local approach. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in Adobe Acrobat Reader up to 2017.011.30197/2020.004.30005/2021.005.20054 (Document Reader Software). This affects an unknown code. The manipulation with an unknown input leads to a use after free vulnerability. CWE is classifying the issue as CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. This is going to have an impact on confidentiality, integrity, and availability.

The weakness was disclosed 07/13/2021 as APSB21-51. The advisory is shared at helpx.adobe.com. This vulnerability is uniquely identified as CVE-2021-28635. Neither technical details nor an exploit are publicly available.

Upgrading to version 2017.011.30199, 2020.004.30006 or 2021.005.20058 eliminates this vulnerability. The upgrade is hosted for download at helpx.adobe.com.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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Vendor

Name

Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Acrobat Reader 2017.011.30199/2020.004.30006/2021.005.20058

Timelineinfo

03/16/2021 🔍
07/13/2021 +118 days 🔍
07/13/2021 +0 days 🔍
07/17/2021 +4 days 🔍

Sourcesinfo

Vendor: adobe.com

Advisory: APSB21-51
Status: Confirmed

CVE: CVE-2021-28635 (🔍)
GCVE (CVE): GCVE-0-2021-28635
GCVE (VulDB): GCVE-100-178497

Entryinfo

Created: 07/13/2021 22:31
Updated: 07/17/2021 08:07
Changes: 07/13/2021 22:31 (41), 07/17/2021 08:07 (1)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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