CVE-2023-25563: GSS-NTLMSSP is a mechglue plugin for the GSSAPI library that..
gss-ntlmssp_project
•
Feb 14, 2023
•
Feb 22, 2023
Description
GSS-NTLMSSP is a mechglue plugin for the GSSAPI library that implements NTLM authentication. Prior to version 1.2.0, multiple out-of-bounds reads when decoding NTLM fields can trigger a denial of service. A 32-bit integer overflow condition can lead to incorrect checks of consistency of length of internal buffers. Although most applications will error out before accepting a singe input buffer of 4GB in length this could theoretically happen. This vulnerability can be triggered via the main `gss_accept_sec_context` entry point if the application allows tokens greater than 4GB in length. This can lead to a large, up to 65KB, out-of-bounds read which could cause a denial-of-service if it reads from unmapped memory. Version 1.2.0 contains a patch for the out-of-bounds reads.
Products affected:
gss-ntlmssp_project» gss-ntlmssp » *
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Severity
7.5
/
10
CVSS base metrics
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
LOW
User interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Exploitability Score
3.9
Impact Score
3.6
Weakness
CWE-125__CWE-125__
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