Permissions, Privileges, and Access Controls in Samba - CVE-2015-8467
Published: December 30, 2015 / Updated: July 28, 2020
Vulnerability identifier: #VU32351
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2015-8467
CWE-ID: CWE-264
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Samba
Affected software:
Samba
Samba
Detailed vulnerability description
The vulnerability allows a remote authenticated user to execute arbitrary code.
The samldb_check_user_account_control_acl function in dsdb/samdb/ldb_modules/samldb.c in Samba 4.x before 4.1.22, 4.2.x before 4.2.7, and 4.3.x before 4.3.3 does not properly check for administrative privileges during creation of machine accounts, which allows remote authenticated users to bypass intended access restrictions by leveraging the existence of a domain with both a Samba DC and a Windows DC, a similar issue to CVE-2015-2535.
How to mitigate CVE-2015-8467
Install update from vendor's website.
Sources
- http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00019.html
- http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00020.html
- http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00032.html
- http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00033.html
- http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00042.html
- http://www.debian.org/security/2016/dsa-3433
- http://www.securityfocus.com/bid/79735
- http://www.securitytracker.com/id/1034493
- http://www.ubuntu.com/usn/USN-2855-1
- http://www.ubuntu.com/usn/USN-2855-2
- https://bugzilla.redhat.com/show_bug.cgi?id=1290294
- https://git.samba.org/?p=samba.git;a=commit;h=b000da128b5fb519d2d3f2e7fd20e4a25b7dae7d
- https://security.gentoo.org/glsa/201612-47
- https://www.samba.org/samba/security/CVE-2015-8467.html