rhsa-2023_3097
Vulnerability from csaf_redhat
Published
2023-05-16 10:07
Modified
2024-11-22 22:59
Summary
Red Hat Security Advisory: gssntlmssp security update

Notes

Topic
An update for gssntlmssp is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details
The gssntlmssp is a GSSAPI NTLM mechanism that allows to perform NTLM authentication in GSSAPI programs. Security Fix(es): * gssntlmssp: multiple out-of-bounds read when decoding NTLM fields (CVE-2023-25563) * gssntlmssp: memory corruption when decoding UTF16 strings (CVE-2023-25564) * gssntlmssp: incorrect free when decoding target information (CVE-2023-25565) * gssntlmssp: memory leak when parsing usernames (CVE-2023-25566) * gssntlmssp: out-of-bounds read when decoding target information (CVE-2023-25567) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Terms of Use
This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.


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  "vulnerabilities": [
    {
      "cve": "CVE-2023-25563",
      "cwe": {
        "id": "CWE-125",
        "name": "Out-of-bounds Read"
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      "discovery_date": "2023-02-21T00:00:00+00:00",
      "ids": [
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          "text": "2172019"
        }
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      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in GSS-NTLMSSP, a mechglue plugin for the GSSAPI library that implements NTLM authentication. Multiple out-of-bounds reads occur when decoding NTLM fields and can trigger a denial of service. A 32-bit integer overflow condition can lead to incorrect checks of the consistency of the length of internal buffers. Although most applications will error out before accepting a single input buffer of 4GB in length, this issue can 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, leading to a large, up to 65KB, out-of-bounds read, which could cause a denial of service if it reads from unmapped memory.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "gssntlmssp: multiple out-of-bounds read when decoding NTLM fields",
          "title": "Vulnerability summary"
        },
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  ]
}


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