CVE-2023-4091 (GCVE-0-2023-4091)
Vulnerability from cvelistv5
Published
2023-11-03 07:56
Modified
2025-08-30 06:03
Severity ?
6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
CWE
  • CWE-276 - Incorrect Default Permissions
Summary
A vulnerability was discovered in Samba, where the flaw allows SMB clients to truncate files, even with read-only permissions when the Samba VFS module "acl_xattr" is configured with "acl_xattr:ignore system acls = yes". The SMB protocol allows opening files when the client requests read-only access but then implicitly truncates the opened file to 0 bytes if the client specifies a separate OVERWRITE create disposition request. The issue arises in configurations that bypass kernel file system permissions checks, relying solely on Samba's permissions.
References
secalert@redhat.com https://access.redhat.com/errata/RHSA-2023:6209 Third Party Advisory
secalert@redhat.com https://access.redhat.com/errata/RHSA-2023:6744 Third Party Advisory
secalert@redhat.com https://access.redhat.com/errata/RHSA-2023:7371
secalert@redhat.com https://access.redhat.com/errata/RHSA-2023:7408
secalert@redhat.com https://access.redhat.com/errata/RHSA-2023:7464
secalert@redhat.com https://access.redhat.com/errata/RHSA-2023:7467
secalert@redhat.com https://access.redhat.com/security/cve/CVE-2023-4091 Third Party Advisory
secalert@redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=2241882 Issue Tracking
secalert@redhat.com https://bugzilla.samba.org/show_bug.cgi?id=15439 Issue Tracking
secalert@redhat.com https://www.samba.org/samba/security/CVE-2023-4091.html Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108 https://access.redhat.com/errata/RHSA-2023:6209 Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 https://access.redhat.com/errata/RHSA-2023:6744 Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 https://access.redhat.com/errata/RHSA-2023:7371
af854a3a-2127-422b-91ae-364da2661108 https://access.redhat.com/errata/RHSA-2023:7408
af854a3a-2127-422b-91ae-364da2661108 https://access.redhat.com/errata/RHSA-2023:7464
af854a3a-2127-422b-91ae-364da2661108 https://access.redhat.com/errata/RHSA-2023:7467
af854a3a-2127-422b-91ae-364da2661108 https://access.redhat.com/security/cve/CVE-2023-4091 Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 https://bugzilla.redhat.com/show_bug.cgi?id=2241882 Issue Tracking
af854a3a-2127-422b-91ae-364da2661108 https://bugzilla.samba.org/show_bug.cgi?id=15439 Issue Tracking
af854a3a-2127-422b-91ae-364da2661108 https://lists.debian.org/debian-lts-announce/2024/04/msg00015.html
af854a3a-2127-422b-91ae-364da2661108 https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZUMVALLFFDFC53JZMUWA6HPD7HUGAP5I/
af854a3a-2127-422b-91ae-364da2661108 https://security.netapp.com/advisory/ntap-20231124-0002/
af854a3a-2127-422b-91ae-364da2661108 https://www.samba.org/samba/security/CVE-2023-4091.html Vendor Advisory
Impacted products
Vendor Product Version
Red Hat Red Hat Enterprise Linux 8 Unaffected: 0:4.18.6-2.el8_9   < *
    cpe:/o:redhat:enterprise_linux:8::baseos
    cpe:/a:redhat:enterprise_linux:8::crb
    cpe:/a:redhat:enterprise_linux:8::appstream
 Create a notification for this product.
   Red Hat Red Hat Enterprise Linux 8 Unaffected: 0:4.18.6-2.el8_9   < *
    cpe:/o:redhat:enterprise_linux:8::baseos
    cpe:/a:redhat:enterprise_linux:8::crb
    cpe:/a:redhat:enterprise_linux:8::appstream
 Create a notification for this product.
   Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Unaffected: 0:4.15.5-13.el8_6   < *
    cpe:/o:redhat:rhel_eus:8.6::baseos
    cpe:/o:redhat:rhev_hypervisor:4.4::el8
    cpe:/a:redhat:rhel_eus:8.6::appstream
    cpe:/a:redhat:rhel_eus:8.6::crb
 Create a notification for this product.
   Red Hat Red Hat Enterprise Linux 8.8 Extended Update Support Unaffected: 0:4.17.5-4.el8_8   < *
    cpe:/o:redhat:rhel_eus:8.8::baseos
    cpe:/a:redhat:rhel_eus:8.8::appstream
    cpe:/a:redhat:rhel_eus:8.8::crb
 Create a notification for this product.
   Red Hat Red Hat Enterprise Linux 9 Unaffected: 0:4.18.6-101.el9_3   < *
    cpe:/a:redhat:enterprise_linux:9::appstream
    cpe:/o:redhat:enterprise_linux:9::baseos
    cpe:/a:redhat:enterprise_linux:9::resilientstorage
    cpe:/a:redhat:enterprise_linux:9::crb
 Create a notification for this product.
   Red Hat Red Hat Enterprise Linux 9 Unaffected: 0:4.18.6-101.el9_3   < *
    cpe:/a:redhat:enterprise_linux:9::appstream
    cpe:/o:redhat:enterprise_linux:9::baseos
    cpe:/a:redhat:enterprise_linux:9::resilientstorage
    cpe:/a:redhat:enterprise_linux:9::crb
 Create a notification for this product.
   Red Hat Red Hat Enterprise Linux 9.0 Extended Update Support Unaffected: 0:4.15.5-111.el9_0   < *
    cpe:/a:redhat:rhel_eus:9.0::crb
    cpe:/a:redhat:rhel_eus:9.0::resilientstorage
    cpe:/o:redhat:rhel_eus:9.0::baseos
    cpe:/a:redhat:rhel_eus:9.0::appstream
 Create a notification for this product.
   Red Hat Red Hat Enterprise Linux 9.2 Extended Update Support Unaffected: 0:4.17.5-104.el9_2   < *
    cpe:/o:redhat:rhel_eus:9.2::baseos
    cpe:/a:redhat:rhel_eus:9.2::resilientstorage
    cpe:/a:redhat:rhel_eus:9.2::crb
    cpe:/a:redhat:rhel_eus:9.2::appstream
 Create a notification for this product.
   Red Hat Red Hat Virtualization 4 for Red Hat Enterprise Linux 8 Unaffected: 0:4.15.5-13.el8_6   < *
    cpe:/o:redhat:rhel_eus:8.6::baseos
    cpe:/o:redhat:rhev_hypervisor:4.4::el8
    cpe:/a:redhat:rhel_eus:8.6::appstream
    cpe:/a:redhat:rhel_eus:8.6::crb
 Create a notification for this product.
   Red Hat Red Hat Enterprise Linux 6     cpe:/o:redhat:enterprise_linux:6
 Create a notification for this product.
   Red Hat Red Hat Enterprise Linux 6     cpe:/o:redhat:enterprise_linux:6
 Create a notification for this product.
   Red Hat Red Hat Enterprise Linux 7     cpe:/o:redhat:enterprise_linux:7
 Create a notification for this product.
   Red Hat Red Hat Storage 3     cpe:/a:redhat:storage:3
 Create a notification for this product.
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          "value": "The vulnerability is most commonly associated with the \"acl_xattr\" module and can be mitigated by setting:\n~~~\n\"acl_xattr:ignore system acls = no\"\n~~~"
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}


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  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
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