Denial of service when handling TCP packets in Cisco IOS and Cisco IOS XE

1) Denial of service

EUVDB-ID: #VU16

Risk: Medium

CVSSv3.1: 7.9 [AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:U/RC:C]

CVE-ID: CVE-2015-6289

CWE-ID: CWE-399 - Resource Management Errors

Exploit availability: No

Description

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

The vulnerability exists due to an error when handling invalid TCP packets. A remote unauthenticated attacker can send multiple TCP packets to affected device and cause it to use all available memory resources.

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

Note: this vulnerability was originally reported in OpenSSH service, however it affects other services as well.

Mitigation

Cybersecurity Help is not aware of any official solution to address this vulnerability.

Vulnerable software versions External links

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160620-isr

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.