Memory disclosure via malformed gvar tuple data
Published Aug 14, 2024 · Updated Aug 14, 2024
Out-of-bounds read in CoolType in affected Adobe Acrobat and Reader releases allows attackers to disclose process memory via a crafted PDF. CoolType trusts packed-point counts and tuple variation sizes in an embedded font's gvar GlyphVariationData, then reads beyond that table's boundary. A targeted user must open the PDF; the disclosed memory can reveal sensitive data and assist ASLR bypass without altering data or interrupting the application.
Summary
What happened
Out-of-bounds read in CoolType in affected Adobe Acrobat and Reader releases allows attackers to disclose process memory via a crafted PDF. CoolType trusts packed-point counts and tuple variation sizes in an embedded font's gvar GlyphVariationData, then reads beyond that table's boundary. A targeted user must open the PDF; the disclosed memory can reveal sensitive data and assist ASLR bypass without altering data or interrupting the application.
The record
- CVE
- CVE-2024-41832
- Published
- Aug 14, 2024
- Updated
- Aug 14, 2024
- Vendor
- Adobe
- Product
- Adobe Acrobat
- Classifications
- CWE-125
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 14, 2024CVE publishedPublication date reported by the CVE source.
- Aug 14, 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 <=24.001.30123
- Affected versionversion=0 <=24.002.20964
- Affected versionversion=0 <=24.002.20991
- Affected versionversion=20.0 <=20.005.30635
- Affected versionversion=20.0 <=20.005.30636
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
- Talos malformed gvar proof of conceptproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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