DEBIAN-CVE-2023-4091
Dashboard / Vulnerabilities / DEBIAN-CVE-2023-4091
Summary:
Details: 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.
Affected packages
Package
Name: samba
Purl: pkg:deb/debian/samba?arch=source&distro=bookworm
Affected ranges
Type: ECOSYSTEM
Events:
Introduced- 0
Fixed -2:4.17.12+dfsg-0+deb12u1
Affected versions
2:4.17.10+dfsg-0+deb12u1
2:4.17.10+dfsg-0+deb12u1~bpo11+1
2:4.17.11+dfsg-0+deb12u1
2:4.17.12+dfsg-0+deb12u1~bpo11+1
2:4.17.8+dfsg-2
2:4.17.8+dfsg-2.1
2:4.17.9+dfsg-0+deb12u1
2:4.17.9+dfsg-0+deb12u2
2:4.17.9+dfsg-0+deb12u3
2:4.17.9+dfsg-0+deb12u3~bpo11+1
Common Vulnerability Scoring System
Attack Vector
Network
Adjacent
Local
Physical
Privileges Required
None
Low
High
User Interaction
None
Required
Scope
Unchanged
Changed
Confidentiality
None
Low
High
Integrity
None
Low
High
Availability
None
Low
High
