Denial of service in Siemens SCALANCE X200 IRT Products

1) Resource exhaustion

EUVDB-ID: #VU49578

Risk: Medium

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-2007-5846

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to the SNMP agent (snmp_agent.c) in net-snmp does not properly control consumption of internal resources. A remote attacker can trigger resource exhaustion by sending a GETBULK request with a large max-repeaters value and perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

SCALANCE X200-4P IRT: before 5.5.0

SIPLUS NET SCALANCE X202-2P IRT: before 5.5.0

SCALANCE XF204IRT: before 5.5.0

SCALANCE X204IRT PRO: before 5.5.0

SCALANCE X204IRT: before 5.5.0

SCALANCE X202-2IRT: before 5.5.0

SCALANCE XF204-2BA IRT: before 5.5.0

SCALANCE XF202-2P IRT: before 5.5.0

SCALANCE XF201-3P IRT: before 5.5.0

SCALANCE X202-2P IRT PRO: before 5.5.0

SCALANCE X202-2P IRT: before 5.5.0

SCALANCE X201-3P IRT PRO: before 5.5.0

SCALANCE X201-3P IRT: before 5.5.0

External links

http://ics-cert.us-cert.gov/advisories/icsa-23-047-02

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.