vulnerability
Amazon Linux AMI 2: CVE-2023-4091: Security patch for samba (ALAS-2023-2367)
Severity | CVSS | Published | Added | Modified |
---|---|---|---|---|
7 | (AV:N/AC:L/Au:S/C:N/I:C/A:N) | Nov 3, 2023 | Dec 5, 2023 | Jan 30, 2025 |
Severity
7
CVSS
(AV:N/AC:L/Au:S/C:N/I:C/A:N)
Published
Nov 3, 2023
Added
Dec 5, 2023
Modified
Jan 30, 2025
Description
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.
Solution(s)
amazon-linux-ami-2-upgrade-ctdbamazon-linux-ami-2-upgrade-ctdb-testsamazon-linux-ami-2-upgrade-libsmbclientamazon-linux-ami-2-upgrade-libsmbclient-develamazon-linux-ami-2-upgrade-libwbclientamazon-linux-ami-2-upgrade-libwbclient-develamazon-linux-ami-2-upgrade-sambaamazon-linux-ami-2-upgrade-samba-clientamazon-linux-ami-2-upgrade-samba-client-libsamazon-linux-ami-2-upgrade-samba-commonamazon-linux-ami-2-upgrade-samba-common-libsamazon-linux-ami-2-upgrade-samba-common-toolsamazon-linux-ami-2-upgrade-samba-dcamazon-linux-ami-2-upgrade-samba-dc-libsamazon-linux-ami-2-upgrade-samba-debuginfoamazon-linux-ami-2-upgrade-samba-develamazon-linux-ami-2-upgrade-samba-krb5-printingamazon-linux-ami-2-upgrade-samba-libsamazon-linux-ami-2-upgrade-samba-pidlamazon-linux-ami-2-upgrade-samba-pythonamazon-linux-ami-2-upgrade-samba-python-testamazon-linux-ami-2-upgrade-samba-testamazon-linux-ami-2-upgrade-samba-test-libsamazon-linux-ami-2-upgrade-samba-vfs-glusterfsamazon-linux-ami-2-upgrade-samba-winbindamazon-linux-ami-2-upgrade-samba-winbind-clientsamazon-linux-ami-2-upgrade-samba-winbind-krb5-locatoramazon-linux-ami-2-upgrade-samba-winbind-modules

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