CVE-2023-25563: GSS-NTLMSSP is a mechglue plugin for the GSSAPI library that..

gss-ntlmssp_project

Feb 14, 2023

Feb 22, 2023

High

7.5

/

10

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:

Are your APIs vulnerable to this CWE?

Are your APIs vulnerable to this CWE?

Are your APIs vulnerable to this CWE?

In a few clicks Akto can analyze your API attack surface and see what APIs are vulnerable to OWASP Top 10 and other common CWEs.

Akto BG image
Akto BG image
Akto BG image

Severity

High

High

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__

Explore more from Akto

Blog

Be updated about everything related to API Security, new API vulnerabilities, industry news and product updates.

Test Library

Discover and find tests from Akto's 100+ API Security test library. Choose your template or add a new template to start your API Security testing.

Documentation

Check out Akto's product documentation for all information related to features and how to use them.