Server-memory disclosure via underlength SMB1 writes
Published Aug 25, 2022 · Updated Aug 3, 2024
Information disclosure in Samba allows remote authenticated users to expose server memory through crafted SMB1 write requests. The SMB1 write path fails to verify that a request carries enough client data and writes server memory into the destination for missing data. The client needs write access to a share, and SMB1 must be enabled; 4.11.0 and later disable SMB1 by default, and the exposed memory region cannot be chosen.
Summary
What happened
Information disclosure in Samba allows remote authenticated users to expose server memory through crafted SMB1 write requests. The SMB1 write path fails to verify that a request carries enough client data and writes server memory into the destination for missing data. The client needs write access to a share, and SMB1 must be enabled; 4.11.0 and later disable SMB1 by default, and the exposed memory region cannot be chosen.
The record
- CVE
- CVE-2022-32742
- Published
- Aug 25, 2022
- Updated
- Aug 3, 2024
- Vendor
- PPP Project
- Product
- Samba
- Classifications
- CWE-200, T1190
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 25, 2022CVE publishedPublication date reported by the CVE source.
- Aug 3, 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=Versions prior to samba 4.16.4, samba 4.15.9, samba 4.14.14
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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Weakness, pattern, technique
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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