Memory disclosure via AlignedBuffer self-move
Published Apr 16, 2024 · Updated Aug 1, 2024
Use-after-free in Mozilla Firefox before 125, Firefox ESR before 115.10, and Thunderbird before 115.10 allows local users to read process memory. AlignedBuffer::operator= accepts the same object as source and destination, then self-moves it, miscounts references, and later accesses freed memory. The published assessment requires local access and limits impact to memory disclosure; Thunderbird disables scripting while reading mail.
Summary
What happened
Use-after-free in Mozilla Firefox before 125, Firefox ESR before 115.10, and Thunderbird before 115.10 allows local users to read process memory. AlignedBuffer::operator= accepts the same object as source and destination, then self-moves it, miscounts references, and later accesses freed memory. The published assessment requires local access and limits impact to memory disclosure; Thunderbird disables scripting while reading mail.
The record
- CVE
- CVE-2024-3861
- Published
- Apr 16, 2024
- Updated
- Aug 1, 2024
- Vendor
- Mozilla
- Product
- Firefox
- Classifications
- CWE-416
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Apr 16, 2024CVE publishedPublication date reported by the CVE source.
- Aug 1, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=-
- Affected versionversion=unspecified <125
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
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo