Code execution via PDFLibTool out-of-bounds read
Published Aug 20, 2021 · Updated Sep 17, 2024
Out-of-bounds read in Adobe Acrobat Reader 2021.005.20054 and earlier allows context-dependent attackers to execute code via a malicious PDF. PDFLibTool reads beyond a buffer boundary while parsing crafted PDF data; Reader 2020.004.30005 and 2017.011.30197 and earlier are also affected. A victim must open the malicious file, after which code runs in the context of the current user.
Summary
What happened
Out-of-bounds read in Adobe Acrobat Reader 2021.005.20054 and earlier allows context-dependent attackers to execute code via a malicious PDF. PDFLibTool reads beyond a buffer boundary while parsing crafted PDF data; Reader 2020.004.30005 and 2017.011.30197 and earlier are also affected. A victim must open the malicious file, after which code runs in the context of the current user.
The record
- CVE
- CVE-2021-28637
- Published
- Aug 20, 2021
- Updated
- Sep 17, 2024
- Vendor
- Adobe
- Product
- Adobe Acrobat Reader
- Classifications
- CWE-125, T1203, T1204.002
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 20, 2021CVE publishedPublication date reported by the CVE source.
- Sep 17, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=unspecified <=2017.011.30197
- Affected versionversion=unspecified <=2020.004.30005
- Affected versionversion=unspecified <=2021.005.20054
- Affected versionversion=unspecified <=None
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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