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6.5Mittel

CVE-2023-4091Samba: smb clients can truncate files with read-only permissions

Red Hat Red Hat Enterprise Linux 8; Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support; Red Hat Red Hat Enterprise Linux 8.8 Extended Update Support;… Veröffentlicht: (vor 3 Jahren)

Beschreibung

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.

Schwachstellentyp (CWE): CWE-276

Daten: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Wiedergegeben wie in der Quelle, auf Englisch.

Betroffene Produkte und Versionen

HerstellerProduktVersionen
enterprise linux 8 —
enterprise linux 9 —
fedoraproject fedora 39
redhat enterprise linux 8.0
redhat enterprise linux eus 9.0
Red Hat Red Hat Enterprise Linux 6 —
Red Hat Red Hat Enterprise Linux 7 —
Red Hat Red Hat Enterprise Linux 8 all versions
Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support all versions
Red Hat Red Hat Enterprise Linux 8.8 Extended Update Support all versions
Red Hat Red Hat Enterprise Linux 9 all versions
Red Hat Red Hat Enterprise Linux 9.0 Extended Update Support all versions
Red Hat Red Hat Enterprise Linux 9.2 Extended Update Support all versions
Red Hat Red Hat Storage 3 —
Red Hat Red Hat Virtualization 4 for Red Hat Enterprise Linux 8 all versions
redhat storage 3.0
rhel eus 8.6 —
rhel eus 8.8 —
rhel eus 9.0 —
rhel eus 9.2 —
rhev hypervisor 4.4 —
samba samba < 4.17.12

Referenzen und Patches

CPE-Treffer (NVD) (7)
  • cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:* < 4.17.12
  • cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:* ≥ 4.18.0 < 4.18.8
  • cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:* ≥ 4.19.0 < 4.19.1
  • cpe:2.3:o:fedoraproject:fedora:39:*:*:*:*:*:*:*
  • cpe:2.3:a:redhat:storage:3.0:*:*:*:*:*:*:*
  • cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
  • cpe:2.3:o:redhat:enterprise_linux_eus:9.0:*:*:*:*:*:*:*

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