#VU33830 Input validation error in Samba
Vulnerability identifier: #VU33830
Vulnerability risk: High
CVSSv3.1: 9.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-20
Exploitation vector: Network
Exploit availability: Yes
Vulnerable software:
Samba
Server applications /
Directory software, identity management
Vendor: Samba
Description
The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.
The Netlogon server implementation in smbd in Samba 3.5.x and 3.6.x before 3.6.25, 4.0.x before 4.0.25, 4.1.x before 4.1.17, and 4.2.x before 4.2.0rc5 performs a free operation on an uninitialized stack pointer, which allows remote attackers to execute arbitrary code via crafted Netlogon packets that use the ServerPasswordSet RPC API, as demonstrated by packets reaching the _netr_ServerPasswordSet function in rpc_server/netlogon/srv_netlog_nt.c.
Mitigation
Install update from vendor's website.
Vulnerable software versions
Samba: 3.6.0 - 3.6.24, 4.0.0 - 4.0.24, 4.1.0 - 4.1.16, 4.2.0 - 4.2.14
External links
http://advisories.mageia.org/MGASA-2015-0084.html
http://lists.opensuse.org/opensuse-security-announce/2015-02/msg00028.html
http://lists.opensuse.org/opensuse-security-announce/2015-02/msg00030.html
http://lists.opensuse.org/opensuse-security-announce/2015-02/msg00031.html
http://lists.opensuse.org/opensuse-security-announce/2015-02/msg00035.html
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00042.html
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00047.html
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00048.html
http://marc.info/?l=bugtraq&m=142722696102151&w=2
http://marc.info/?l=bugtraq&m=143039217203031&w=2
http://rhn.redhat.com/errata/RHSA-2015-0249.html
http://rhn.redhat.com/errata/RHSA-2015-0250.html
http://rhn.redhat.com/errata/RHSA-2015-0251.html
http://rhn.redhat.com/errata/RHSA-2015-0252.html
http://rhn.redhat.com/errata/RHSA-2015-0253.html
http://rhn.redhat.com/errata/RHSA-2015-0254.html
http://rhn.redhat.com/errata/RHSA-2015-0255.html
http://rhn.redhat.com/errata/RHSA-2015-0256.html
http://rhn.redhat.com/errata/RHSA-2015-0257.html
http://security.gentoo.org/glsa/glsa-201502-15.xml
http://www.debian.org/security/2015/dsa-3171
http://www.mandriva.com/security/advisories?name=MDVSA-2015:081
http://www.mandriva.com/security/advisories?name=MDVSA-2015:082
http://www.oracle.com/technetwork/topics/security/bulletinjan2015-2370101.html
http://www.securityfocus.com/bid/72711
http://www.securitytracker.com/id/1031783
http://www.slackware.com/security/viewer.php?l=slackware-security&y=2015&m=slackware-security.360345
http://www.ubuntu.com/usn/USN-2508-1
http://access.redhat.com/articles/1346913
http://bugzilla.redhat.com/show_bug.cgi?id=1191325
http://securityblog.redhat.com/2015/02/23/samba-vulnerability-cve-2015-0240/
http://support.lenovo.com/product_security/samba_remote_vuln
http://support.lenovo.com/us/en/product_security/samba_remote_vuln
http://www.exploit-db.com/exploits/36741/
http://www.samba.org/samba/security/CVE-2015-0240
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
Yes. This vulnerability is being exploited in the wild.
