Adobe Acrobat Reader CoolType Library out-of-bounds write

CVSS Meta Temp Score
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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-$25k0.00

Summaryinfo

A vulnerability marked as critical has been reported in Adobe Acrobat Reader up to 2017.011.30188/2020.001.30018/2020.013.20074. The impacted element is an unknown function of the component CoolType Library. This manipulation causes out-of-bounds write. The identification of this vulnerability is CVE-2021-21086. It is possible to initiate the attack remotely. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Adobe Acrobat Reader up to 2017.011.30188/2020.001.30018/2020.013.20074 (Document Reader Software). It has been declared as critical. Affected by this vulnerability is an unknown code of the component CoolType Library. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. The CWE definition for the vulnerability is CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect confidentiality, integrity, and availability.

The weakness was shared 09/02/2021 as apsb21-09. The advisory is shared at helpx.adobe.com. This vulnerability is known as CVE-2021-21086. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 09/02/2021).

Upgrading eliminates this vulnerability.

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Productinfo

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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

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

Exploitinginfo

Class: Out-of-bounds write
CWE: CWE-787 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

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: 🔍

Timelineinfo

12/18/2020 🔍
09/02/2021 +257 days 🔍
09/02/2021 +0 days 🔍
09/09/2021 +7 days 🔍

Sourcesinfo

Vendor: adobe.com

Advisory: apsb21-09
Status: Confirmed

CVE: CVE-2021-21086 (🔍)
GCVE (CVE): GCVE-0-2021-21086
GCVE (VulDB): GCVE-100-181969

Entryinfo

Created: 09/02/2021 22:44
Updated: 09/09/2021 10:52
Changes: 09/02/2021 22:44 (40), 09/09/2021 10:45 (2), 09/09/2021 10:52 (1)
Complete: 🔍
Cache ID: 216::103

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