Samba is an open-source implementation of the Server Message Block (SMB) or Common Internet File System (CIFS) protocol, which allows PC-compatible machines to share files, printers, and other information. A denial of service flaw was found in the LDAP server provided by the AD DC in the Samba process daemon. A remote attacker could exploit this flaw by sending a specially crafted packet, which could cause the server to consume an excessive amount of memory and crash. (CVE-2015-7540) Multiple buffer over-read flaws were found in the way Samba handled malformed inputs in certain encodings. An authenticated, remote attacker could possibly use these flaws to disclose portions of the server memory. (CVE-2015-5330) A man-in-the-middle vulnerability was found in the way “connection signing” was implemented by Samba. A remote attacker could use this flaw to downgrade an existing Samba client connection and force the use of plain text. (CVE-2015-5296) A missing access control flaw was found in Samba. A remote, authenticated attacker could use this flaw to view the current snapshot on a Samba share, despite not having DIRECTORY_LIST access rights. (CVE-2015-5299) An access flaw was found in the way Samba verified symbolic links when creating new files on a Samba share. A remote attacker could exploit this flaw to gain access to files outside of Samba’s share path. (CVE-2015-5252) Red Hat would like to thank the Samba project for reporting these issues. Upstream acknowledges Stefan Metzmacher of the Samba Team and Sernet.de as the original reporters of CVE-2015-5296, [email protected] as the original reporter of CVE-2015-5299, Jan “Yenya” Kasprzak and the Computer Systems Unit team at Faculty of Informatics, Masaryk University as the original reporters of CVE-2015-5252 flaws, and Douglas Bagnall as the original reporter of CVE-2015-5330. All samba users are advised to upgrade to these updated packages, which contain backported patches to correct these issues. After installing this update, the smb service will be restarted automatically.
lists.opensuse.org/opensuse-security-announce/2015-12/msg00019.html
lists.opensuse.org/opensuse-security-announce/2015-12/msg00020.html
lists.opensuse.org/opensuse-security-announce/2015-12/msg00032.html
lists.opensuse.org/opensuse-security-announce/2015-12/msg00033.html
lists.opensuse.org/opensuse-security-announce/2016-01/msg00002.html
lists.opensuse.org/opensuse-security-announce/2016-01/msg00017.html
lists.opensuse.org/opensuse-security-announce/2016-04/msg00042.html
lists.opensuse.org/opensuse-security-announce/2016-04/msg00047.html
lists.opensuse.org/opensuse-security-announce/2016-04/msg00048.html
www.debian.org/security/2016/dsa-3433
www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html
www.securityfocus.com/bid/79734
www.securitytracker.com/id/1034493
www.ubuntu.com/usn/USN-2855-1
www.ubuntu.com/usn/USN-2855-2
www.ubuntu.com/usn/USN-2856-1
access.redhat.com/security/updates/classification/#moderate
bugzilla.redhat.com/show_bug.cgi?id=1281326
bugzilla.redhat.com/show_bug.cgi?id=1288451
git.samba.org/?p=samba.git;a=commit;h=0454b95657846fcecf0f51b6f1194faac02518bd
git.samba.org/?p=samba.git;a=commit;h=538d305de91e34a2938f5f219f18bf0e1918763f
git.samba.org/?p=samba.git;a=commit;h=7f51ec8c4ed9ba1f53d722e44fb6fb3cde933b72
git.samba.org/?p=samba.git;a=commit;h=a118d4220ed85749c07fb43c1229d9e2fecbea6b
git.samba.org/?p=samba.git;a=commit;h=ba5dbda6d0174a59d221c45cca52ecd232820d48
git.samba.org/?p=samba.git;a=commit;h=f36cb71c330a52106e36028b3029d952257baf15
rhn.redhat.com/errata/RHSA-2016-0006.html
security.gentoo.org/glsa/201612-47
www.samba.org/samba/security/CVE-2015-5330.html