Permissions, Privileges, and Access Controls in Samba - CVE-2015-8467

Vulnerability details

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.

Affected software

How to mitigate CVE-2015-8467

External References

• 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

Related Security Bulletins

• Permissions, Privileges, and Access Controls in Samba
• OpenSUSE Linux update for ldb, samba, talloc, tdb, tevent
• SUSE Linux update for ldb, samba, talloc, tdb, tevent
• SUSE Linux update for ldb, samba, talloc, tdb, tevent
• Permissions, Privileges, and Access Controls in samba (Alpine package)