Sensitive-memory disclosure via out-of-bounds read
Published Sep 7, 2023 · Updated Aug 4, 2024
Out-of-bounds read in Adobe Acrobat Reader 2017.011.30188 and earlier allows context-dependent attackers to disclose memory via a malicious PDF. Adobe has not disclosed the affected parser or the malformed PDF structure that causes the read to cross its intended memory boundary. Exploitation requires a victim to open the file, and the disclosed memory can reveal address data that assists an ASLR bypass.
Summary
What happened
Out-of-bounds read in Adobe Acrobat Reader 2017.011.30188 and earlier allows context-dependent attackers to disclose memory via a malicious PDF. Adobe has not disclosed the affected parser or the malformed PDF structure that causes the read to cross its intended memory boundary. Exploitation requires a victim to open the file, and the disclosed memory can reveal address data that assists an ASLR bypass.
The record
- CVE
- CVE-2021-40723
- Published
- Sep 7, 2023
- Updated
- Aug 4, 2024
- Vendor
- Adobe
- Product
- Adobe Acrobat Reader
- Classifications
- CWE-125, T1204.002
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Sep 7, 2023CVE publishedPublication date reported by the CVE source.
- Aug 4, 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=0 <=2017.011.30188
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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