Huawei EulerOS: CVE-2023-4091: samba security update
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)
- huawei-euleros-2_0_sp5-upgrade-libsmbclient
- huawei-euleros-2_0_sp5-upgrade-libwbclient
- huawei-euleros-2_0_sp5-upgrade-samba
- huawei-euleros-2_0_sp5-upgrade-samba-client
- huawei-euleros-2_0_sp5-upgrade-samba-client-libs
- huawei-euleros-2_0_sp5-upgrade-samba-common
- huawei-euleros-2_0_sp5-upgrade-samba-common-libs
- huawei-euleros-2_0_sp5-upgrade-samba-common-tools
- huawei-euleros-2_0_sp5-upgrade-samba-libs
- huawei-euleros-2_0_sp5-upgrade-samba-python
- huawei-euleros-2_0_sp5-upgrade-samba-winbind
- huawei-euleros-2_0_sp5-upgrade-samba-winbind-clients
- huawei-euleros-2_0_sp5-upgrade-samba-winbind-modules
- Lightweight Endpoint Agent
- Live Dashboards
- Real Risk Prioritization
- IT-Integrated Remediation Projects
- Cloud, Virtual, and Container Assessment
- Integrated Threat Feeds
- Easy-to-Use RESTful API
- Automation-Assisted Patching
- Automated Containment
With Rapid7 live dashboards, I have a clear view of all the assets on my network, which ones can be exploited, and what I need to do in order to reduce the risk in my environment in real-time. No other tool gives us that kind of value and insight.
– Scott Cheney, Manager of Information Security, Sierra View Medical Center