#VU33812 Input validation error in Samba - CVE-2015-3223
Vulnerability identifier: #VU33812
Vulnerability risk: Medium
CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID:
CWE-ID:
CWE-20
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
Samba
Server applications /
Directory software, identity management
Vendor: Samba
Description
The vulnerability allows a remote non-authenticated attacker to perform service disruption.
The ldb_wildcard_compare function in ldb_match.c in ldb before 1.1.24, as used in the AD LDAP server in Samba 4.x before 4.1.22, 4.2.x before 4.2.7, and 4.3.x before 4.3.3, mishandles certain zero values, which allows remote attackers to cause a denial of service (infinite loop) via crafted packets.
Mitigation
Install update from vendor's website.
Vulnerable software versions
Samba: 3.4.0 - 3.4.17, 4.0.0 - 4.0.26, 4.1.0 - 4.1.21
External links
https://lists.fedoraproject.org/pipermail/package-announce/2015-December/174076.html
https://lists.fedoraproject.org/pipermail/package-announce/2015-December/174391.html
https://lists.opensuse.org/opensuse-security-announce/2015-12/msg00019.html
https://lists.opensuse.org/opensuse-security-announce/2015-12/msg00020.html
https://lists.opensuse.org/opensuse-security-announce/2015-12/msg00032.html
https://lists.opensuse.org/opensuse-security-announce/2015-12/msg00033.html
https://lists.opensuse.org/opensuse-security-announce/2016-04/msg00042.html
https://www.debian.org/security/2016/dsa-3433
https://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html
https://www.securityfocus.com/bid/79731
https://www.securitytracker.com/id/1034493
https://www.ubuntu.com/usn/USN-2855-1
https://www.ubuntu.com/usn/USN-2855-2
https://www.ubuntu.com/usn/USN-2856-1
https://bugzilla.redhat.com/show_bug.cgi?id=1290287
https://git.samba.org/?p=samba.git;a=commit;h=aa6c27148b9d3f8c1e4fdd5dd46bfecbbd0ca465
https://git.samba.org/?p=samba.git;a=commit;h=ec504dbf69636a554add1f3d5703dd6c3ad450b8
https://security.gentoo.org/glsa/201612-47
https://www.samba.org/samba/security/CVE-2015-3223.html
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?
No. We are not aware of malware exploiting this vulnerability.
