Adobe Acrobat Reader PDFLibTool heap-based overflow

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 (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	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.
6.0	$5k-$25k	0.00

Summaryinfo

A vulnerability, which was classified as critical, was found in Adobe Acrobat Reader up to 2017.011.30194/2020.001.30020/2021.001.20150. Affected by this issue is some unknown functionality of the component PDFLibTool. The manipulation results in heap-based overflow. This vulnerability is cataloged as CVE-2021-28558. The attack may be launched remotely. There is no exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in Adobe Acrobat Reader up to 2017.011.30194/2020.001.30020/2021.001.20150 (Document Reader Software). Affected is some unknown functionality of the component PDFLibTool. The manipulation with an unknown input leads to a heap-based overflow vulnerability. CWE is classifying the issue as CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). This is going to have an impact on confidentiality, integrity, and availability.

The weakness was shared 09/02/2021 as apsb21-29. The advisory is available at helpx.adobe.com. This vulnerability is traded as CVE-2021-28558. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $5k-$25k at the moment (estimation calculated on 09/02/2021).

Upgrading eliminates this vulnerability.

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Productinfo

Type

Document Reader Software

Vendor

Adobe

Name

Acrobat Reader

Version

License

free

Website

Vendor: https://www.adobe.com/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.0

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Heap-based overflow
CWE: CWE-122 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

03/16/2021 🔍
09/02/2021 +169 days 🔍
09/02/2021 +0 days 🔍
09/09/2021 +7 days 🔍

Sourcesinfo

Vendor: adobe.com

Advisory: apsb21-29
Status: Confirmed

CVE: CVE-2021-28558 (🔍)
GCVE (CVE): GCVE-0-2021-28558
GCVE (VulDB): GCVE-100-181974

Entryinfo

Created: 09/02/2021 22:48
Updated: 09/09/2021 11:50
Changes: 09/02/2021 22:48 (40), 09/09/2021 11:42 (2), 09/09/2021 11:50 (1)
Complete: 🔍
Cache ID: 216::103