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Out-of-bounds Read Affecting gssntlmssp package, versions <0:1.2.0-1.el8_8

medium

Snyk CVSS

    Attack Complexity Low
    Availability High

    Threat Intelligence

    EPSS 0.09% (37th percentile)
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NVD
7.5 high
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Red Hat
7.5 high

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  • Snyk ID SNYK-ORACLE8-GSSNTLMSSP-5600391
  • published 25 May 2023
  • disclosed 14 Feb 2023
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Introduced: 14 Feb 2023

CVE-2023-25563 Open this link in a new tab
CWE-125 Open this link in a new tab

How to fix?

Upgrade Oracle:8 gssntlmssp to version 0:1.2.0-1.el8_8 or higher.
This issue was patched in ELSA-2023-3097.

NVD Description

Note: Versions mentioned in the description apply only to the upstream gssntlmssp package and not the gssntlmssp package as distributed by Oracle. See How to fix? for Oracle:8 relevant fixed versions and status.

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.