Memory disclosure via unchecked clipboard cache index
Published Jul 9, 2024 · Updated Nov 4, 2025
Out-of-bounds read in Mozilla Firefox and Thunderbird before 128 allows remote attackers to disclose process memory through clipboard handling. GetClipboardCacheIfValid trusts an array index received from a content process and accesses the clipboard cache without checking that the index is in bounds. Reaching the flaw requires user interaction with attacker-controlled content; Thunderbird email reading normally disables scripting, limiting exposure to browser-like contexts.
Summary
What happened
Out-of-bounds read in Mozilla Firefox and Thunderbird before 128 allows remote attackers to disclose process memory through clipboard handling. GetClipboardCacheIfValid trusts an array index received from a content process and accesses the clipboard cache without checking that the index is in bounds. Reaching the flaw requires user interaction with attacker-controlled content; Thunderbird email reading normally disables scripting, limiting exposure to browser-like contexts.
The record
- CVE
- CVE-2024-6606
- Published
- Jul 9, 2024
- Updated
- Nov 4, 2025
- Vendor
- Mozilla
- Product
- Firefox
- Classifications
- CWE-125
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 9, 2024CVE publishedPublication date reported by the CVE source.
- Nov 4, 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 <128
- Affected versionversion=unspecified <128
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
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Your stack
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