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CVE-2023-32252

Public on

Last Modified: UTC

ImportantImportant ImpactWhat does this mean?
7.5CVSS v3 Base ScoreCVSS Score Breakdown


DESCRIPTION

A flaw was found in the Linux kernel's ksmbd, a high-performance in-kernel SMB
server. The specific flaw exists within the handling of SMB2_LOGOFF commands.
The issue results from the lack of proper validation of a pointer prior to
accessing it. An attacker can leverage this vulnerability to create a
denial-of-service condition on the system.

A flaw was found in the Linux kernel's ksmbd, a high-performance in-kernel SMB
server. The specific flaw exists within the handling of SMB2_LOGOFF commands.
The issue results from the lack of proper validation of a pointer prior to
accessing it. An attacker can leverage this vulnerability to create a
denial-of-service condition on the system.


STATEMENT

No Red Hat products are affected by this flaw, as the ksmbd code is not included
in any shipping kernel release.

No Red Hat products are affected by this flaw, as the ksmbd code is not included
in any shipping kernel release.




ADDITIONAL INFORMATION

 * Bugzilla 2219815: session NULL pointer dereference denial-of-service
   vulnerability
 * CWE-476: NULL Pointer Dereference
 * FAQ: Frequently asked questions about CVE-2023-32252


EXTERNAL REFERENCES

https://www.cve.org/CVERecord?id=CVE-2023-32252
https://nvd.nist.gov/vuln/detail/CVE-2023-32252
https://www.zerodayinitiative.com/advisories/ZDI-CAN-20590/

https://www.cve.org/CVERecord?id=CVE-2023-32252
https://nvd.nist.gov/vuln/detail/CVE-2023-32252
https://www.zerodayinitiative.com/advisories/ZDI-CAN-20590/


AFFECTED PACKAGES AND ISSUED RED HAT SECURITY ERRATA

Search:

PlatformPackageStateErrataRelease DateRed Hat Enterprise Linux 7kernel-rtNot
affectedRed Hat Enterprise Linux 8kernel-rtNot affectedRed Hat Enterprise Linux
9kernel-rtNot affectedRed Hat Enterprise Linux 6kernelNot affectedRed Hat
Enterprise Linux 7kernelNot affectedRed Hat Enterprise Linux 8kernelNot
affectedRed Hat Enterprise Linux 9kernelNot affected

Show 102550100 entries
FirstPrevious1NextLast
Showing 1 to 7 of 7 entries


Unless explicitly stated as not affected, all previous versions of packages in
any minor update stream of a product listed here should be assumed vulnerable,
although may not have been subject to full analysis.


COMMON VULNERABILITY SCORING SYSTEM (CVSS) SCORE DETAILS


IMPORTANT NOTE

CVSS scores for open source components depend on vendor-specific factors (e.g.
version or build chain). Therefore, Red Hat's score and impact rating can be
different from NVD and other vendors. Red Hat remains the authoritative CVE
Naming Authorities (CNA) source for its products and services (see Red Hat
classifications).

The following CVSS metrics and score provided are preliminary and subject to
review.

CVSS v3 Score BreakdownRed HatNVDCVSS v3 Base Score7.5Attack VectorNetworkAttack
ComplexityLowPrivileges RequiredNoneUser
InteractionNoneScopeUnchangedConfidentiality ImpactNoneIntegrity
ImpactNoneAvailability ImpactHigh


CVSS V3 VECTOR

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


FREQUENTLY ASKED QUESTIONS


WHY IS RED HAT'S CVSS V3 SCORE OR IMPACT DIFFERENT FROM OTHER VENDORS?

For open source software shipped by multiple vendors, the CVSS base scores may
vary for each vendor's version depending on the version they ship, how they ship
it, the platform, and even how the software is compiled. This makes scoring of
vulnerabilities difficult for third-party vulnerability databases such as NVD
that only provide a single CVSS base score for each vulnerability. Red Hat
scores reflect how a vulnerability affects our products specifically.

For more information, see https://access.redhat.com/solutions/762393.


MY PRODUCT IS LISTED AS "UNDER INVESTIGATION" OR "AFFECTED", WHEN WILL RED HAT
RELEASE A FIX FOR THIS VULNERABILITY?

 * "Under investigation" doesn't necessarily mean that the product is affected
   by this vulnerability. It only means that our Analysis Team is still working
   on determining whether the product is affected and how it is affected.
 * "Affected" means that our Analysis Team has determined that this product is
   affected by this vulnerability and might release a fix to address this in the
   near future.


WHAT CAN I DO IF MY PRODUCT IS LISTED AS "WILL NOT FIX"?

This depends mostly on the Impact of the vulnerability and the Life Cycle phase
in which your product is currently in. Overall, you have the following options:
 * Upgrade to a supported product version that includes a fix for this
   vulnerability (recommended)
 * Apply a mitigation (if one exists)
 * Open a support case to request a prioritization of releasing a fix for this
   vulnerability


I HAVE A RED HAT PRODUCT BUT IT IS NOT IN THE ABOVE LIST, IS IT AFFECTED?

The listed products were found to include one or more of the components that
this vulnerability affects. These products underwent a thorough evaluation to
determine their affectedness by this vulnerability. Note that layered products
(such as container-based offerings) that consume affected components from any of
the products listed in this table may be affected and are not represented.


WHY IS MY SECURITY SCANNER REPORTING MY PRODUCT AS VULNERABLE TO THIS
VULNERABILITY EVEN THOUGH MY PRODUCT VERSION IS FIXED OR NOT AFFECTED?

In order to maintain code stability and compatibility, Red Hat usually does not
rebase packages to entirely new versions. Instead, we backport fixes and new
features to an older version of the package we distribute. This can result in
some security scanners that only consider the package version to report the
package as vulnerable. To avoid this, we suggest that you use an OVAL-compatible
security scanner like OpenSCAP.

For more information, see https://www.redhat.com/en/blog/determining-your-risk.

Not sure what something means? Check out our Security Glossary.

This page is generated automatically and has not been checked for errors or
omissions.

For clarification or corrections please contact Red Hat Product Security.

Last Modified: UTC

CVE description copyright © 2021



Red Hat


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