Client spoofing via weak remote Winspool authentication
Published Jan 12, 2021 · Updated Oct 8, 2024
Authentication bypass in Microsoft Windows Print Spooler allows remote attackers to spoof clients through the remote Winspool RPC interface. The Printer RPC binding accepts remote Winspool traffic without the higher authentication level needed to enforce packet privacy. User interaction is required to initiate the connection, and Microsoft has not published further details about the attacker's post-authentication actions.
Summary
What happened
Authentication bypass in Microsoft Windows Print Spooler allows remote attackers to spoof clients through the remote Winspool RPC interface. The Printer RPC binding accepts remote Winspool traffic without the higher authentication level needed to enforce packet privacy. User interaction is required to initiate the connection, and Microsoft has not published further details about the attacker's post-authentication actions.
The record
- CVE
- CVE-2021-1678
- Published
- Jan 12, 2021
- Updated
- Oct 8, 2024
- Vendor
- Microsoft
- Product
- Windows 10 Version 1507
- Classifications
- T1187
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jan 12, 2021CVE publishedPublication date reported by the CVE source.
- Oct 8, 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=10.0.0 <10.0.10240.19060
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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