Denial of service when handling IPv6 packets in MikroTik RouterOS

1) Memory corruption

EUVDB-ID: #VU10752

Risk: Medium

CVSSv3.1: 7.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: N/A

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

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

The vulnerability exists due to boundary error error within IKE1 implementation when handling IPv6 packets. A remote attacker can send a series of specially crafted packets and trigger memory corruption.

Successful exploitation of the vulnerability may result in denial of service (DoS) attack.

Mitigation

Update your firmware to version 6.40.6 or 6.41.

Vulnerable software versions

MikroTik RouterOS: 6.40 - 6.40.5

External links

http://mikrotik.com/download/changelogs/current-release-tree

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.