Memory over-read via unchecked NegotiateFlags length
Published May 29, 2020 · Updated Aug 4, 2024
Out-of-bounds read in FreeRDP 2.0.0 and earlier allows remote authenticated users to read beyond an NTLM message buffer. In ntlm_read_NegotiateMessage, the parser reads the four-byte NegotiateFlags field without first confirming that four bytes remain in the input stream. The flaw affects clients and servers that use NTLM authentication; a later validation check aborts processing, limiting the consequence to a small memory over-read.
Summary
What happened
Out-of-bounds read in FreeRDP 2.0.0 and earlier allows remote authenticated users to read beyond an NTLM message buffer. In ntlm_read_NegotiateMessage, the parser reads the four-byte NegotiateFlags field without first confirming that four bytes remain in the input stream. The flaw affects clients and servers that use NTLM authentication; a later validation check aborts processing, limiting the consequence to a small memory over-read.
The record
- CVE
- CVE-2020-11088
- Published
- May 29, 2020
- Updated
- Aug 4, 2024
- Vendor
- FreeRDP
- Product
- FreeRDP
- Classifications
- CWE-125
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- May 29, 2020CVE publishedPublication date reported by the CVE source.
- Aug 4, 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?
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- Affected versionversion=<= 2.0.0
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What is affected?
Published CVSS scores
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Attacks
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