Memory disclosure via unchecked CharStrings offsets
Published Feb 15, 2024 · Updated Feb 13, 2025
Out-of-bounds read in Adobe Acrobat Reader 20.005.30539 and 23.008.20470 and earlier allows attackers to disclose memory via a crafted PDF. The CoolType CFF2 parser accepts a CharStringsOffset beyond the remaining table data, derives an arbitrarily large object length, and reads past the object buffer. Exploitation requires a victim to open a PDF containing the malformed font and exposes sensitive memory that can assist an ASLR bypass.
Summary
What happened
Out-of-bounds read in Adobe Acrobat Reader 20.005.30539 and 23.008.20470 and earlier allows attackers to disclose memory via a crafted PDF. The CoolType CFF2 parser accepts a CharStringsOffset beyond the remaining table data, derives an arbitrarily large object length, and reads past the object buffer. Exploitation requires a victim to open a PDF containing the malformed font and exposes sensitive memory that can assist an ASLR bypass.
The record
- CVE
- CVE-2024-20749
- Published
- Feb 15, 2024
- Updated
- Feb 13, 2025
- Vendor
- Adobe
- Product
- Adobe Acrobat Reader
- Classifications
- CWE-125, T1204.002
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Feb 15, 2024CVE publishedPublication date reported by the CVE source.
- Feb 13, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=0 <=23.008.20470
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
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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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