OpenSUSE Linux update for samba

1) Resource exhaustion

EUVDB-ID: #VU234

Risk: Medium

CVSSv3.1: 4.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2015-5370

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to improper validation of DCE-RPC packets by the DCE-RPC client and server implementations. A remote attacker can downgrade a secure connection to an insecure one and consume a large amount of CPU resources by using man-in-the-middle techniques.

Successful exploitation of this vulnerability may result in a a denial of service.

Mitigation

Update the affected packages.

Vulnerable software versions

Samba: 3.6.0 - 4.4.4

External links

http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00023.html

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Man-in-the-middle attack

EUVDB-ID: #VU235

Risk: Medium

CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2016-2110

CWE-ID: CWE-300 - Channel Accessible by Non-Endpoint ('Man-in-the-Middle')

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass security restrictions.

The vulnerability exists due to the failure to protect the feature negotiation of NTLMSSP from a downgrade. A remote unauthenticated attacker can bypass security restrictions by using man-in-the-middle techniques to clear NTLMSSP_NEGOTIATE_SIGN and NTLMSSP_NEGOTIATE_SEAL flags and perform downgrade attacks.

Successful exploitation of this vulnerability may result in security restrictions bypass.

Mitigation

Update the affected packages.

Vulnerable software versions

Samba: 3.0.0 - 4.3.7

Oracle Solaris: 10 - 11.3

Oracle Linux: 5 - 7

External links

http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00023.html

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

3) Man-in-the-middle attack

EUVDB-ID: #VU236

Risk: Medium

CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2016-2111

CWE-ID: CWE-290 - Authentication Bypass by Spoofing

Exploit availability: No

Description

The vulnerability allows a remote attacker to to conduct spoofing attacks.

The vulnerability exists due to an error in the NETLOGON service when a Domain Controller is configured. A remote unauthenticated attacker can conduct spoofing attacks by using a specially crafted application to connect to another domain joined system and access session-related information of the spoofed computer.

Successful exploitation of this vulnerability may result in disclosure of user information.

Mitigation

Update the affected packages.

Vulnerable software versions

Samba: 3.0.0 - 4.0.0

Oracle Solaris: 10 - 11.3

Oracle Linux: 5 - 7

External links

http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00023.html

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

4) Man-in-the-middle attack

EUVDB-ID: #VU237

Risk: Medium

CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2016-2112

CWE-ID: CWE-300 - Channel Accessible by Non-Endpoint ('Man-in-the-Middle')

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass security restrictions.

The vulnerability exists due to the failure to enforce integrity protection by the LDAP client and server. A remote unauthenticated attacker can bypass security restrictions by using man-in-the-middle techniques to downgrade LDAP connections.

Successful exploitation of this vulnerability may result in security restrictions bypass.

Mitigation

Update the affected packages.

Vulnerable software versions

Samba: 3.0.0 - 4.0.0

External links

http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00023.html

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

5) Man-in-the-middle attack

EUVDB-ID: #VU238

Risk: Medium

CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2016-2113

CWE-ID: CWE-300 - Channel Accessible by Non-Endpoint ('Man-in-the-Middle')

Exploit availability: No

Description

The vulnerability allows a remote attacker to to bypass security restrictions.

The vulnerability exists due to the failure to validate TLS certificates. A remote unauthenticated attacker can bypass security restrictions by using man-in-the-middle techniques to perform unauthorized actions.

Successful exploitation of this vulnerability may result in security restrictions bypass.

Mitigation

Update the affected packages.

Vulnerable software versions

Samba: 4.0.0 - 4.3.7

Oracle Solaris: 11.3

Oracle Linux: 6 - 7

External links

http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00023.html

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

6) Man-in-the-middle attack

EUVDB-ID: #VU240

Risk: Medium

CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2016-2115

CWE-ID: CWE-300 - Channel Accessible by Non-Endpoint ('Man-in-the-Middle')

Exploit availability: No

Description

The vulnerability allows a remote attacker to to bypass security restrictions.

The vulnerability exists due to the failure to protect the integrity of SMB client connections for IPC traffic. A remote unauthenticated attacker can bypass security restrictions by using man-in-the-middle techniques to perform unauthorized actions.

Successful exploitation of this vulnerability may result in security restrictions bypass.

Mitigation

Update the affected packages.

Vulnerable software versions

Samba: 3.0.0 - 4.0.0

External links

http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00023.html

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

7) Man-in-the-middle attack

EUVDB-ID: #VU241

Risk: High

CVSSv3.1: 6.2 [CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2016-2118

CWE-ID: CWE-300 - Channel Accessible by Non-Endpoint ('Man-in-the-Middle')

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain elevated privileges on the system.

The vulnerability exists due to the acceptance of inadequate authentication levels by the Microsoft Security Account Manager (SAM) and Local Security Authority (Domain Policy) (LSAD) remote protocols. A remote attacker can gain elevated privileges on the system by using man-in-the-middle techniques to impersonate an authenticated user against the SAMR or LSAD service and gain access to the Security Account Manager (SAM) database.

Successful exploitation of this vulnerability may result in disclosere of sytem information.

Mitigation

Update the affected packages.

Vulnerable software versions

Samba: 3.6.0

External links

http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00023.html

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.