Vulnerability identifier: #VU7691

Vulnerability risk: Medium

CVSSv3.1: 6.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: N/A

CWE-ID: CWE-264

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
MikroTik RouterOS
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor: MikroTik

Description

Multiple issues have been fixed in Mikrotik RouterOS 6.40. Due to vendor’s policy not to report on security issues, we treat all new releases as security updates.

The list of bugfixes:

*) bonding - improved reliability on bonding interface removal;
*) chr - fixed false warnings on upgrade reboots;
*) dhcpv6-client - do not run DHCPv6 client when IPv6 package is disabled;
*) export - fixed export for different parameters where numerical range or constant string is expected;
*) firewall - properly remove "address-list" entry after timeout ends;
*) interface - improved interface state change handling when multiple interfaces are affected at the same time;
*) lte - fixed LTE not passing any traffic while in running state;
*) ovpn-client - fixed incorrect netmask usage for pushed routes (introduced in 6.40);
*) pppoe-client - fixed incorrectly formed PADT packet;
*) rb2011 - fixed possible LCD blinking along with ethernet LED (introduced in 6.40);
*) rb922 - restored missing wireless interface on some boards;
*) torch - fixed Torch on PPP tunnels (introduced in 6.40);
*) trafficgen - fixed "lost-ratio" showing incorrect statistics after multiple sequences;
*) winbox - added "none-dynamic" and "none-static" options for "address-list-timeout" parameter under NAT, Mangle and RAW rules;

Mitigation
Update to version 6.40.1.

Vulnerable software versions

MikroTik RouterOS: 6.40

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

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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.