Multiple vulnerabilities in Siemens SCALANCE X-200 and X-300/X408 Switches

1) Consuming excessive CPU resources on the target system

EUVDB-ID: #VU252

Risk: Medium

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2016-6515

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to consume excessive CPU resources on the target system.

The vulnerability exists in the crypt(3) function, which accepts passwords longer that 1024 characters in auth_password() function in the auth_passwd.c . A remote unauthenticated attacker can submit a very long string as a password and consume excessive CPU resources.

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

Mitigation

Install update from vendor's website.

Vulnerable software versions

SCALANCE X408-2: All versions

SCALANCE X320-1-2LD FE: All versions

SCALANCE X320-1 FE: All versions

SCALANCE X307-2 EEC: All versions

SCALANCE X306-1LD FE: All versions

SCALANCE X304-2FE: All versions

SCALANCE X302-7 EEC: All versions

SCALANCE XR324-12M TS: All versions

SCALANCE XR324-12M: All versions

SCALANCE XR324-4M POE TS: All versions

SCALANCE XR324-4M POE: All versions

SCALANCE XR324-4M EEC: All versions

SCALANCE X310FE: All versions

SCALANCE X310: All versions

SCALANCE X308-2M TS: All versions

SCALANCE X308-2M POE: All versions

SCALANCE X308-2M: All versions

SCALANCE X308-2LH+: All versions

SCALANCE X308-2LH: All versions

SCALANCE X308-2LD: All versions

SCALANCE X308-2: All versions

SCALANCE X307-3LD: All versions

SCALANCE X307-3: All versions

SCALANCE XF204-2BA IRT: All versions

SCALANCE XF204 IRT: All versions

SCALANCE XF202-2P IRT: All versions

SCALANCE XF201-3P IRT: All versions

SCALANCE X204 IRT PRO: All versions

SCALANCE X204 IRT: All versions

SCALANCE X202-2P IRT PRO: All versions

SCALANCE X202-2P IRT: All versions

SCALANCE X202-2 IRT: All versions

SCALANCE X201-3P IRT PRO: All versions

SCALANCE X201-3P IRT: All versions

SCALANCE X200-4P IRT: All versions

SCALANCE XF208: before 5.2.5

SCALANCE XF206-1: before 5.2.5

SCALANCE XF204-2: before 5.2.5

SCALANCE XF204: before 5.2.5

SCALANCE X224: before 5.2.5

SCALANCE X216: before 5.2.5

SCALANCE X212-2LD: before 5.2.5

SCALANCE X212-2: before 5.2.5

SCALANCE X208PRO: before 5.2.5

SCALANCE X208: before 5.2.5

SCALANCE X206-1LD: before 5.2.5

SCALANCE X206-1: before 5.2.5

SCALANCE X204-2TS: before 5.2.5

SCALANCE X204-2LD TS: before 5.2.5

SCALANCE X204-2LD: before 5.2.5

SCALANCE X204-2FM: before 5.2.5

SCALANCE X204-2: before 5.2.5

External links

http://cert-portal.siemens.com/productcert/txt/ssa-676336.txt

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 device in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.

2) Information disclosure

EUVDB-ID: #VU2068

Risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2016-10011

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a local user to gain access to potentially sensitive information.

The vulnerability exists due to an error in authfile.c, which may allow a local authenticated user to obtain host private key material.

Successful exploitation of this vulnerability may allow a local user to gain access to otherwise restricted information.

Mitigation

Install update from vendor's website.

Vulnerable software versions

SCALANCE X408-2: All versions

SCALANCE X320-1-2LD FE: All versions

SCALANCE X320-1 FE: All versions

SCALANCE X307-2 EEC: All versions

SCALANCE X306-1LD FE: All versions

SCALANCE X304-2FE: All versions

SCALANCE X302-7 EEC: All versions

SCALANCE XR324-12M TS: All versions

SCALANCE XR324-12M: All versions

SCALANCE XR324-4M POE TS: All versions

SCALANCE XR324-4M POE: All versions

SCALANCE XR324-4M EEC: All versions

SCALANCE X310FE: All versions

SCALANCE X310: All versions

SCALANCE X308-2M TS: All versions

SCALANCE X308-2M POE: All versions

SCALANCE X308-2M: All versions

SCALANCE X308-2LH+: All versions

SCALANCE X308-2LH: All versions

SCALANCE X308-2LD: All versions

SCALANCE X308-2: All versions

SCALANCE X307-3LD: All versions

SCALANCE X307-3: All versions

SCALANCE XF204-2BA IRT: All versions

SCALANCE XF204 IRT: All versions

SCALANCE XF202-2P IRT: All versions

SCALANCE XF201-3P IRT: All versions

SCALANCE X204 IRT PRO: All versions

SCALANCE X204 IRT: All versions

SCALANCE X202-2P IRT PRO: All versions

SCALANCE X202-2P IRT: All versions

SCALANCE X202-2 IRT: All versions

SCALANCE X201-3P IRT PRO: All versions

SCALANCE X201-3P IRT: All versions

SCALANCE X200-4P IRT: All versions

SCALANCE XF208: before 5.2.5

SCALANCE XF206-1: before 5.2.5

SCALANCE XF204-2: before 5.2.5

SCALANCE XF204: before 5.2.5

SCALANCE X224: before 5.2.5

SCALANCE X216: before 5.2.5

SCALANCE X212-2LD: before 5.2.5

SCALANCE X212-2: before 5.2.5

SCALANCE X208PRO: before 5.2.5

SCALANCE X208: before 5.2.5

SCALANCE X206-1LD: before 5.2.5

SCALANCE X206-1: before 5.2.5

SCALANCE X204-2TS: before 5.2.5

SCALANCE X204-2LD TS: before 5.2.5

SCALANCE X204-2LD: before 5.2.5

SCALANCE X204-2FM: before 5.2.5

SCALANCE X204-2: before 5.2.5

External links

http://cert-portal.siemens.com/productcert/txt/ssa-676336.txt

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

How the attacker can exploit this vulnerability?

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

The attacker would have to login to the system and perform certain actions 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) Null pointer dereference

EUVDB-ID: #VU14163

Risk: Low

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

CVE-ID: CVE-2016-10708

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The vulnerability exists due to improper processing of out-of-sequence NEWKEYS messages, as defined in the kex.c and packet.c source code files. A remote attacker can send an out-of-sequence NEWKEYS message, trigger a NULL pointer dereference condition and cause the sshd daemon to crash.

Mitigation

Install update from vendor's website.

Vulnerable software versions

SCALANCE X408-2: All versions

SCALANCE X320-1-2LD FE: All versions

SCALANCE X320-1 FE: All versions

SCALANCE X307-2 EEC: All versions

SCALANCE X306-1LD FE: All versions

SCALANCE X304-2FE: All versions

SCALANCE X302-7 EEC: All versions

SCALANCE XR324-12M TS: All versions

SCALANCE XR324-12M: All versions

SCALANCE XR324-4M POE TS: All versions

SCALANCE XR324-4M POE: All versions

SCALANCE XR324-4M EEC: All versions

SCALANCE X310FE: All versions

SCALANCE X310: All versions

SCALANCE X308-2M TS: All versions

SCALANCE X308-2M POE: All versions

SCALANCE X308-2M: All versions

SCALANCE X308-2LH+: All versions

SCALANCE X308-2LH: All versions

SCALANCE X308-2LD: All versions

SCALANCE X308-2: All versions

SCALANCE X307-3LD: All versions

SCALANCE X307-3: All versions

SCALANCE XF204-2BA IRT: All versions

SCALANCE XF204 IRT: All versions

SCALANCE XF202-2P IRT: All versions

SCALANCE XF201-3P IRT: All versions

SCALANCE X204 IRT PRO: All versions

SCALANCE X204 IRT: All versions

SCALANCE X202-2P IRT PRO: All versions

SCALANCE X202-2P IRT: All versions

SCALANCE X202-2 IRT: All versions

SCALANCE X201-3P IRT PRO: All versions

SCALANCE X201-3P IRT: All versions

SCALANCE X200-4P IRT: All versions

SCALANCE XF208: before 5.2.5

SCALANCE XF206-1: before 5.2.5

SCALANCE XF204-2: before 5.2.5

SCALANCE XF204: before 5.2.5

SCALANCE X224: before 5.2.5

SCALANCE X216: before 5.2.5

SCALANCE X212-2LD: before 5.2.5

SCALANCE X212-2: before 5.2.5

SCALANCE X208PRO: before 5.2.5

SCALANCE X208: before 5.2.5

SCALANCE X206-1LD: before 5.2.5

SCALANCE X206-1: before 5.2.5

SCALANCE X204-2TS: before 5.2.5

SCALANCE X204-2LD TS: before 5.2.5

SCALANCE X204-2LD: before 5.2.5

SCALANCE X204-2FM: before 5.2.5

SCALANCE X204-2: before 5.2.5

External links

http://cert-portal.siemens.com/productcert/txt/ssa-676336.txt

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 device in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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