Sensitive information disclosure via smbx integer overflow
Published Sep 8, 2021 · Updated Aug 3, 2024
Integer overflow in smbx in Apple macOS before Big Sur 11.3 allows attackers to read sensitive user data from a privileged network position. Apple identifies insufficient input validation in smbx but has not disclosed the parsed field, arithmetic operation, or path from overflow to disclosure. The attacker must occupy a privileged network position; the reported consequence is information disclosure without integrity or availability impact.
Summary
What happened
Integer overflow in smbx in Apple macOS before Big Sur 11.3 allows attackers to read sensitive user data from a privileged network position. Apple identifies insufficient input validation in smbx but has not disclosed the parsed field, arithmetic operation, or path from overflow to disclosure. The attacker must occupy a privileged network position; the reported consequence is information disclosure without integrity or availability impact.
The record
- CVE
- CVE-2021-1878
- Published
- Sep 8, 2021
- Updated
- Aug 3, 2024
- Vendor
- Apple
- Product
- macOS
- Classifications
- CWE-190
- Attack vector
- network
- Privileges
- Unavailable
Timeline
How it unfolded
- Sep 8, 2021CVE 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=unspecified <11.3
- Affected versionversion=unspecified <2021
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.
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Technologies
Your stack
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Your stack
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