Vulnerability identifier: #VU32350

Vulnerability risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2015-5330

CWE-ID: CWE-200

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 gain access to sensitive information.

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 string lengths, which allows remote attackers to obtain sensitive information from daemon heap memory by sending crafted packets and then reading (1) an error message or (2) a database value.

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

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External links
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/2016-01/msg00002.html
http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00017.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://www.debian.org/security/2016/dsa-3433
http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html
http://www.securityfocus.com/bid/79734
http://www.securitytracker.com/id/1034493
http://www.ubuntu.com/usn/USN-2855-1
http://www.ubuntu.com/usn/USN-2855-2
http://www.ubuntu.com/usn/USN-2856-1
http://bugzilla.redhat.com/show_bug.cgi?id=1281326
http://git.samba.org/?p=samba.git;a=commit;h=0454b95657846fcecf0f51b6f1194faac02518bd
http://git.samba.org/?p=samba.git;a=commit;h=538d305de91e34a2938f5f219f18bf0e1918763f
http://git.samba.org/?p=samba.git;a=commit;h=7f51ec8c4ed9ba1f53d722e44fb6fb3cde933b72
http://git.samba.org/?p=samba.git;a=commit;h=a118d4220ed85749c07fb43c1229d9e2fecbea6b
http://git.samba.org/?p=samba.git;a=commit;h=ba5dbda6d0174a59d221c45cca52ecd232820d48
http://git.samba.org/?p=samba.git;a=commit;h=f36cb71c330a52106e36028b3029d952257baf15
http://security.gentoo.org/glsa/201612-47
http://www.samba.org/samba/security/CVE-2015-5330.html

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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.