Adobe Acrobat Reader use after free

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CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.2$5k-$25k0.00

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 rated as critical. Affected by this issue is an unknown function. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-416. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Acrobat Reader DC versions versions 2020.013.20074 (and earlier), 2020.001.30018 (and earlier) and 2017.011.30188 (and earlier) are affected by a Use After Free vulnerability. An unauthenticated attacker could leverage this vulnerability to achieve arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.

The weakness was published 02/12/2021. The advisory is shared for download at helpx.adobe.com. This vulnerability is handled as CVE-2021-21028 since 12/18/2020. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 02/28/2021).

Upgrading eliminates this vulnerability.

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CVSSv3infoedit

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.2

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

NVD Base Score: 8.8
NVD Vector: 🔒

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

NVD Base Score: 🔒

Exploitinginfoedit

Class: Memory corruption
CWE: CWE-416
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfoedit

Threat: 🔍
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Countermeasuresinfoedit

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Timelineinfoedit

12/18/2020 CVE assigned
02/12/2021 +56 days Advisory disclosed
02/12/2021 +0 days VulDB entry created
02/28/2021 +16 days VulDB last update

Sourcesinfoedit

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

Advisory: helpx.adobe.com
Status: Confirmed

CVE: CVE-2021-21028 (🔒)

Entryinfoedit

Created: 02/12/2021 11:41 AM
Updated: 02/28/2021 03:43 PM
Changes: (19) vulnerability_cvss3_nvd_av vulnerability_cvss3_nvd_ac vulnerability_cvss3_nvd_pr vulnerability_cvss3_nvd_ui vulnerability_cvss3_nvd_s vulnerability_cvss3_nvd_c vulnerability_cvss3_nvd_i vulnerability_cvss3_nvd_a vulnerability_cvss2_nvd_av vulnerability_cvss2_nvd_ac vulnerability_cvss2_nvd_au vulnerability_cvss2_nvd_ci vulnerability_cvss2_nvd_ii vulnerability_cvss2_nvd_ai source_cve_cna vulnerability_cvss3_meta_basescore vulnerability_cvss3_meta_tempscore vulnerability_cvss2_nvd_basescore vulnerability_cvss3_nvd_basescore
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