Re: Two vulnerabilities found in MikroTik's RouterOS

[Q C <cq674350529 () gmail com>]

[Update 2021/05/04] Two CVEs have been assigned to these vulnerabilities.

CVE-2020-20221: Mikrotik RouterOs before 6.44.6 (long-term tree) suffers
from an uncontrolled resource consumption vulnerability in the
/nova/bin/cerm process. An authenticated remote attacker can cause a Denial
of Service due to overloading the systems CPU.

CVE-2020-20218: Mikrotik RouterOs 6.44.6 (long-term tree) suffers from a
memory corruption vulnerability in the /nova/bin/traceroute process. An
authenticated remote attacker can cause a Denial of Service due via the
loop counter variable.



Q C <cq674350529 () gmail com> 于2020年5月10日周日 上午10:41写道：

> Advisory: two vulnerabilities found in MikroTik's RouterOS
>
>
> Details
> =======
>
> Product: MikroTik's RouterOS
> Affected Versions: until stable 6.45.7 (first vulnerability), until stable
> 6.46.4 (second vulnerability)
> Fixed Versions: stable 6.46.x (first vulnerability), stable 6.46.5 (second
> vulnerability)
> Vendor URL: https://mikrotik.com/
> Vendor Status: fixed version released
> CVE: -
> Credit: Qian Chen(@cq674350529) of Qihoo 360 Nirvan Team
>
>
> Product Description
> ==================
>
> RouterOS is the operating system used on the MikroTik's devices, such as
> switch, router and access point.
>
>
> Description of vulnerabilities
> ==========================
>
> These two vulnerabilities were tested only against the MikroTik RouterOS
> stable release tree when found. Maybe other release trees also suffer from
> these vulnerabilities.
>
> 1. The cerm process suffers from an uncontrolled resource consumption
> issue. By sending a crafted packet, an authenticated remote user can cause
> a high cpu load, which may make the device respond slowly or unable to
> respond.
>
> 2. The traceroute process suffers from a memory corruption issue. By
> sending a crafted packet, an authenticated remote user can crash the
> traceroute process due to invalid memory access.
>
>
> Solution
> ========
>
> Upgrade to the corresponding latest RouterOS tree version.
>
>
> References
> ==========
>
> [1] https://mikrotik.com/download/changelogs/stable-release-tree

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