Sensitive-data disclosure via uninitialized WebGL outputs
Published Aug 6, 2024 · Updated Sep 17, 2024
Uninitialized memory exposure in Mozilla Firefox, Firefox ESR, and Thunderbird allows remote attackers to read GPU data through WebGL. ANGLE leaves unwritten GLSL shader output parameters uninitialized, causing WebGL rendering to expose residual graphics-memory contents. A crafted WebGL shader is the gate; affected releases are Firefox before 129, Firefox ESR before 115.14 or 128.1, and Thunderbird before 115.14 or 128.1, while email scripting is normally disabled in Thunderbird.
Summary
What happened
Uninitialized memory exposure in Mozilla Firefox, Firefox ESR, and Thunderbird allows remote attackers to read GPU data through WebGL. ANGLE leaves unwritten GLSL shader output parameters uninitialized, causing WebGL rendering to expose residual graphics-memory contents. A crafted WebGL shader is the gate; affected releases are Firefox before 129, Firefox ESR before 115.14 or 128.1, and Thunderbird before 115.14 or 128.1, while email scripting is normally disabled in Thunderbird.
The record
- CVE
- CVE-2024-7526
- Published
- Aug 6, 2024
- Updated
- Sep 17, 2024
- Vendor
- Mozilla
- Product
- Firefox
- Classifications
- CWE-908
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 6, 2024CVE publishedPublication date reported by the CVE source.
- Sep 17, 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 <129
- Affected versionversion=unspecified <129
What conditions does exploitation require?
What is affected?
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
- Shadertoy WebGL uninitialized-output demonstrationproof 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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