Vulnerability-Lookup

RHSA-2023_3097

Vulnerability from csaf_redhat - Published: 2023-05-16 10:07 - Updated: 2024-11-22 22:59

Summary

Red Hat Security Advisory: gssntlmssp security update

Severity

Moderate

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.

CVE-2023-25563

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.

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE-125 - Out-of-bounds Read

Vendor Fix For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 https://access.redhat.com/errata/RHSA-2023:3097

CVE-2023-25564

A flaw was found in GSS-NTLMSSP, a mechglue plugin for the GSSAPI library that implements NTLM authentication. Memory corruption can be triggered when decoding UTF16 strings. The variable `outlen` was not initialized and could cause writing a zero to an arbitrary place in memory if the `ntlm_str_convert()` fails, which would leave `outlen` uninitialized. This issue can lead to a denial of service if the write hits unmapped memory or randomly corrupts a byte in the application memory space. This vulnerability can trigger an out-of-bounds write, leading to memory corruption, and can be triggered via the main `gss_accept_sec_context` entry point.

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE-787 - Out-of-bounds Write

CVE-2023-25565

A flaw was found in GSS-NTLMSSP, a mechglue plugin for the GSSAPI library that implements NTLM authentication. An incorrect free when decoding target information can trigger a denial of service. The error condition incorrectly assumes the `cb` and `sh` buffers contain a copy of the data that needs to be freed. However, that is not the case. This vulnerability can be triggered via the main `gss_accept_sec_context` entry point. This issue will likely trigger an assertion failure in `free,` causing a denial of service.

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE-590 - Free of Memory not on the Heap

CVE-2023-25566

A flaw was found in GSS-NTLMSSP, a mechglue plugin for the GSSAPI library that implements NTLM authentication. A memory leak can be triggered when parsing usernames, triggering a denial of service. The domain portion of a username may be overridden, causing an allocated memory area the size of the domain name to be leaked. This flaw allows an attacker to leak memory via the main `gss_accept_sec_context` entry point, potentially causing a denial of service.

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE-401 - Missing Release of Memory after Effective Lifetime

CVE-2023-25567

A flaw was found in GSS-NTLMSSP, a mechglue plugin for the GSSAPI library that implements NTLM authentication. It has an out-of-bounds read when decoding target information. The length of the `av_pair` is not checked properly for two of the elements, which can trigger an out-of-bounds read via the main `gss_accept_sec_context` entry point and could cause a denial of service if the memory is unmapped.

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE-125 - Out-of-bounds Read

References

URL

Category

	https://access.redhat.com/errata/RHSA-2023:3097	self
	https://access.redhat.com/security/updates/classi…	external
	https://bugzilla.redhat.com/show_bug.cgi?id=2172019	external
	https://bugzilla.redhat.com/show_bug.cgi?id=2172020	external
	https://bugzilla.redhat.com/show_bug.cgi?id=2172021	external
	https://bugzilla.redhat.com/show_bug.cgi?id=2172022	external
	https://bugzilla.redhat.com/show_bug.cgi?id=2172023	external
	https://security.access.redhat.com/data/csaf/v2/a…	self
	https://access.redhat.com/security/cve/CVE-2023-25563	self
	https://bugzilla.redhat.com/show_bug.cgi?id=2172019	external
	https://www.cve.org/CVERecord?id=CVE-2023-25563	external
	https://nvd.nist.gov/vuln/detail/CVE-2023-25563	external
	https://github.com/gssapi/gss-ntlmssp/security/ad…	external
	https://access.redhat.com/security/cve/CVE-2023-25564	self
	https://bugzilla.redhat.com/show_bug.cgi?id=2172020	external
	https://www.cve.org/CVERecord?id=CVE-2023-25564	external
	https://nvd.nist.gov/vuln/detail/CVE-2023-25564	external
	https://github.com/gssapi/gss-ntlmssp/security/ad…	external
	https://access.redhat.com/security/cve/CVE-2023-25565	self
	https://bugzilla.redhat.com/show_bug.cgi?id=2172021	external
	https://www.cve.org/CVERecord?id=CVE-2023-25565	external
	https://nvd.nist.gov/vuln/detail/CVE-2023-25565	external
	https://github.com/gssapi/gss-ntlmssp/security/ad…	external
	https://access.redhat.com/security/cve/CVE-2023-25566	self
	https://bugzilla.redhat.com/show_bug.cgi?id=2172022	external
	https://www.cve.org/CVERecord?id=CVE-2023-25566	external
	https://nvd.nist.gov/vuln/detail/CVE-2023-25566	external
	https://github.com/gssapi/gss-ntlmssp/security/ad…	external
	https://access.redhat.com/security/cve/CVE-2023-25567	self
	https://bugzilla.redhat.com/show_bug.cgi?id=2172023	external
	https://www.cve.org/CVERecord?id=CVE-2023-25567	external
	https://nvd.nist.gov/vuln/detail/CVE-2023-25567	external
	https://github.com/gssapi/gss-ntlmssp/security/ad…	external

JSON

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      ],
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        {
          "category": "impact",
          "details": "Moderate"
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      ],
      "title": "gssntlmssp: out-of-bounds read when decoding target information"
    }
  ]
}

CVE-2023-25567 (GCVE-0-2023-25567)

Vulnerability from cvelistv5 – Published: 2023-02-14 17:35 – Updated: 2025-03-10 21:11

Title

GSS-NTLMSSP vulnerable to out-of-bounds read when decoding target information

Summary

GSS-NTLMSSP, a mechglue plugin for the GSSAPI library that implements NTLM authentication, has an out-of-bounds read when decoding target information prior to version 1.2.0. The length of the `av_pair` is not checked properly for two of the elements which can trigger an out-of-bound read. The out-of-bounds read can be triggered via the main `gss_accept_sec_context` entry point and could cause a denial-of-service if the memory is unmapped. The issue is fixed in version 1.2.0.

Severity ?

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE

CWE-125 - Out-of-bounds Read

Assigner

GitHub_M

References

URL

Tags

	https://github.com/gssapi/gss-ntlmssp/security/ad…	x_refsource_CONFIRM
	https://github.com/gssapi/gss-ntlmssp/commit/025f…	x_refsource_MISC
	https://github.com/gssapi/gss-ntlmssp/releases/ta…	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	gssapi	gss-ntlmssp	Affected: < 1.2.0

Show details on NVD website

JSON

To clipboard

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CVE-2023-25565 (GCVE-0-2023-25565)

Vulnerability from cvelistv5 – Published: 2023-02-14 17:35 – Updated: 2025-03-10 21:11

Title

GSS-NTLMSSP vulnerable to incorrect free when decoding target information

Summary

GSS-NTLMSSP is a mechglue plugin for the GSSAPI library that implements NTLM authentication. Prior to version 1.2.0, an incorrect free when decoding target information can trigger a denial of service. The error condition incorrectly assumes the `cb` and `sh` buffers contain a copy of the data that needs to be freed. However, that is not the case. This vulnerability can be triggered via the main `gss_accept_sec_context` entry point. This will likely trigger an assertion failure in `free`, causing a denial-of-service. This issue is fixed in version 1.2.0.

Severity ?

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE

CWE-590 - Free of Memory not on the Heap

Assigner

GitHub_M

References

URL

Tags

	https://github.com/gssapi/gss-ntlmssp/security/ad…	x_refsource_CONFIRM
	https://github.com/gssapi/gss-ntlmssp/commit/c161…	x_refsource_MISC
	https://github.com/gssapi/gss-ntlmssp/releases/ta…	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	gssapi	gss-ntlmssp	Affected: < 1.2.0

Show details on NVD website

JSON

To clipboard

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CVE-2023-25564 (GCVE-0-2023-25564)

Vulnerability from cvelistv5 – Published: 2023-02-14 17:35 – Updated: 2025-03-10 21:12

Title

GSS-NTLMSSP vulnerable to memory corruption when decoding UTF16 strings

Summary

GSS-NTLMSSP is a mechglue plugin for the GSSAPI library that implements NTLM authentication. Prior to version 1.2.0, memory corruption can be triggered when decoding UTF16 strings. The variable `outlen` was not initialized and could cause writing a zero to an arbitrary place in memory if `ntlm_str_convert()` were to fail, which would leave `outlen` uninitialized. This can lead to a denial of service if the write hits unmapped memory or randomly corrupts a byte in the application memory space. This vulnerability can trigger an out-of-bounds write, leading to memory corruption. This vulnerability can be triggered via the main `gss_accept_sec_context` entry point. This issue is fixed in version 1.2.0.

Severity ?

6.5 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H

CWE

CWE-787 - Out-of-bounds Write

Assigner

GitHub_M

References

URL

Tags

	https://github.com/gssapi/gss-ntlmssp/security/ad…	x_refsource_CONFIRM
	https://github.com/gssapi/gss-ntlmssp/commit/c753…	x_refsource_MISC
	https://github.com/gssapi/gss-ntlmssp/releases/ta…	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	gssapi	gss-ntlmssp	Affected: < 1.2.0

Show details on NVD website

JSON

To clipboard

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CVE-2023-25566 (GCVE-0-2023-25566)

Vulnerability from cvelistv5 – Published: 2023-02-14 17:35 – Updated: 2025-03-10 21:11

Title

GSS-NTLMSSP vulnerable to memory leak when parsing usernames

Summary

GSS-NTLMSSP is a mechglue plugin for the GSSAPI library that implements NTLM authentication. Prior to version 1.2.0, a memory leak can be triggered when parsing usernames which can trigger a denial-of-service. The domain portion of a username may be overridden causing an allocated memory area the size of the domain name to be leaked. An attacker can leak memory via the main `gss_accept_sec_context` entry point, potentially causing a denial-of-service. This issue is fixed in version 1.2.0.

Severity ?

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE

CWE-401 - Missing Release of Memory after Effective Lifetime

Assigner

GitHub_M

References

URL

Tags

	https://github.com/gssapi/gss-ntlmssp/security/ad…	x_refsource_CONFIRM
	https://github.com/gssapi/gss-ntlmssp/commit/8660…	x_refsource_MISC
	https://github.com/gssapi/gss-ntlmssp/releases/ta…	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	gssapi	gss-ntlmssp	Affected: < 1.2.0

Show details on NVD website

JSON

To clipboard

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CVE-2023-25563 (GCVE-0-2023-25563)

Vulnerability from cvelistv5 – Published: 2023-02-14 17:35 – Updated: 2025-03-10 21:12

Title

GSS-NTLMSSP vulnerable to multiple out-of-bounds reads when decoding NTLM fields

Summary

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.

Severity ?

5.9 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE

CWE-125 - Out-of-bounds Read

Assigner

GitHub_M

References

URL

Tags

	https://github.com/gssapi/gss-ntlmssp/security/ad…	x_refsource_CONFIRM
	https://github.com/gssapi/gss-ntlmssp/commit/97c6…	x_refsource_MISC
	https://github.com/gssapi/gss-ntlmssp/releases/ta…	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	gssapi	gss-ntlmssp	Affected: < 1.2.0

Show details on NVD website

JSON

To clipboard

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Tags

Taxonomy of the tags.

All sightings related to this event Export sightings related to this event

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

RHSA-2023_3097

CVE-2023-25567 (GCVE-0-2023-25567)

CVE-2023-25565 (GCVE-0-2023-25565)

CVE-2023-25564 (GCVE-0-2023-25564)

CVE-2023-25566 (GCVE-0-2023-25566)

CVE-2023-25563 (GCVE-0-2023-25563)

Tags

Sightings

Nomenclature