Code execution via PDFLibTool heap overflow
Published Sep 2, 2021 · Updated Sep 16, 2024
A heap-based buffer overflow in Adobe Acrobat Reader allows remote attackers to execute code through a malicious PDF opened by a user. The PDFLibTool component writes beyond an allocated heap buffer while parsing crafted PDF content, but Adobe has not disclosed the specific parser operation or field. Exploitation requires the victim to open the file and runs code in the current user's context on Windows or macOS.
Summary
What happened
A heap-based buffer overflow in Adobe Acrobat Reader allows remote attackers to execute code through a malicious PDF opened by a user. The PDFLibTool component writes beyond an allocated heap buffer while parsing crafted PDF content, but Adobe has not disclosed the specific parser operation or field. Exploitation requires the victim to open the file and runs code in the current user's context on Windows or macOS.
The record
- CVE
- CVE-2021-28558
- Published
- Sep 2, 2021
- Updated
- Sep 16, 2024
- Vendor
- Adobe
- Product
- Adobe Acrobat Reader
- Classifications
- CWE-122, T1203
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Sep 2, 2021CVE publishedPublication date reported by the CVE source.
- Sep 16, 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 <=2017.011.30194
- Affected versionversion=unspecified <=2020.001.30020
- Affected versionversion=unspecified <=2021.001.20150
- 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.
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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