#VU33830 Input validation error in Samba - CVE-2015-0240
Vulnerability identifier: #VU33830
Vulnerability risk: High
CVSSv4.0: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Amber]
CVE-ID: CVE-2015-0240
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
https://advisories.mageia.org/MGASA-2015-0084.html
https://lists.opensuse.org/opensuse-security-announce/2015-02/msg00028.html
https://lists.opensuse.org/opensuse-security-announce/2015-02/msg00030.html
https://lists.opensuse.org/opensuse-security-announce/2015-02/msg00031.html
https://lists.opensuse.org/opensuse-security-announce/2015-02/msg00035.html
https://lists.opensuse.org/opensuse-security-announce/2016-04/msg00042.html
https://lists.opensuse.org/opensuse-security-announce/2016-04/msg00047.html
https://lists.opensuse.org/opensuse-security-announce/2016-04/msg00048.html
https://marc.info/?l=bugtraq&m=142722696102151&w=2
https://marc.info/?l=bugtraq&m=143039217203031&w=2
https://rhn.redhat.com/errata/RHSA-2015-0249.html
https://rhn.redhat.com/errata/RHSA-2015-0250.html
https://rhn.redhat.com/errata/RHSA-2015-0251.html
https://rhn.redhat.com/errata/RHSA-2015-0252.html
https://rhn.redhat.com/errata/RHSA-2015-0253.html
https://rhn.redhat.com/errata/RHSA-2015-0254.html
https://rhn.redhat.com/errata/RHSA-2015-0255.html
https://rhn.redhat.com/errata/RHSA-2015-0256.html
https://rhn.redhat.com/errata/RHSA-2015-0257.html
https://security.gentoo.org/glsa/glsa-201502-15.xml
https://www.debian.org/security/2015/dsa-3171
https://www.mandriva.com/security/advisories?name=MDVSA-2015:081
https://www.mandriva.com/security/advisories?name=MDVSA-2015:082
https://www.oracle.com/technetwork/topics/security/bulletinjan2015-2370101.html
https://www.securityfocus.com/bid/72711
https://www.securitytracker.com/id/1031783
https://www.slackware.com/security/viewer.php?l=slackware-security&y=2015&m=slackware-security.360345
https://www.ubuntu.com/usn/USN-2508-1
https://access.redhat.com/articles/1346913
https://bugzilla.redhat.com/show_bug.cgi?id=1191325
https://securityblog.redhat.com/2015/02/23/samba-vulnerability-cve-2015-0240/
https://support.lenovo.com/product_security/samba_remote_vuln
https://support.lenovo.com/us/en/product_security/samba_remote_vuln
https://www.exploit-db.com/exploits/36741/
https://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.
