full-disclosure - Re: [FD] Two vulnerabilities found in MikroTik's RouterOS

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Date: Tue, 4 May 2021 23:19:00 +0800
From: Q C <cq674350529@...il.com>
To: fulldisclosure@...lists.org
Subject: Re: [FD] Two vulnerabilities found in MikroTik's RouterOS

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

CVE-2020-20219: Mikrotik RouterOs 6.44.6 (long-term tree) suffers from a
memory corruption vulnerability in the /nova/bin/igmp-proxy process. An
authenticated remote attacker can cause a Denial of Service (NULL pointer
dereference).

CVE-2020-20262: Mikrotik RouterOs before 6.47 (stable tree) suffers from an
assertion failure vulnerability in the /ram/pckg/security/nova/bin/ipsec
process. An authenticated remote attacker can cause a Denial of Service due
to an assertion failure via a crafted packet.

Q C <cq674350529@...il.com> 于2020年8月13日周四 下午7:14写道：

> Advisory: two vulnerabilities found in MikroTik's RouterOS
>
>
> Details
> =======
>
> Product: MikroTik's RouterOS
> 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
> ==========================
>
> 1. NULL pointer dereference
> The igmpproxy process suffers from a memory corruption vulnerability. By
> sending a crafted packet, an authenticated remote user can crash the
> igmpproxy process due to NULL pointer dereference.
>
> Against stable 6.46.5, the poc resulted in the following crash dump.
>
>     # cat /rw/logs/backtrace.log
>     2020.06.04-17:44:27.12@0:
>     2020.06.04-17:44:27.12@0:
>     2020.06.04-17:44:27.12@0: /ram/pckg/multicast/nova/bin/igmpproxy
>     2020.06.04-17:44:27.12@0: --- signal=11
> --------------------------------------------
>     2020.06.04-17:44:27.12@0:
>     2020.06.04-17:44:27.12@0: eip=0x08050a8d eflags=0x00010206
>     2020.06.04-17:44:27.12@0: edi=0x7fa9331c esi=0x7fa932b8
> ebp=0x7fa932a8 esp=0x7fa9326c
>     2020.06.04-17:44:27.12@0: eax=0x080581bc ebx=0x00000000
> ecx=0x0000000b edx=0x00000000
>     2020.06.04-17:44:27.12@0:
>     2020.06.04-17:44:27.12@0: maps:
>     2020.06.04-17:44:27.12@0: 08048000-08053000 r-xp 00000000 00:13 16
>       /ram/pckg/multicast/nova/bin/igmpproxy
>     2020.06.04-17:44:27.12@0: 7770b000-77740000 r-xp 00000000 00:0c 964
>      /lib/libuClibc-0.9.33.2.so
>     2020.06.04-17:44:27.12@0: 77744000-7775e000 r-xp 00000000 00:0c 960
>      /lib/libgcc_s.so.1
>     2020.06.04-17:44:27.12@0: 7775f000-7776e000 r-xp 00000000 00:0c 944
>      /lib/libuc++.so
>     2020.06.04-17:44:27.12@0: 7776f000-77777000 r-xp 00000000 00:0c 950
>      /lib/libubox.so
>     2020.06.04-17:44:27.12@0: 77778000-777c4000 r-xp 00000000 00:0c 946
>      /lib/libumsg.so
>     2020.06.04-17:44:27.12@0: 777ca000-777d1000 r-xp 00000000 00:0c 958
>      /lib/ld-uClibc-0.9.33.2.so
>     2020.06.04-17:44:27.12@0:
>     2020.06.04-17:44:27.12@0: stack: 0x7fa94000 - 0x7fa9326c
>     2020.06.04-17:44:27.12@0: 01 00 00 00 e8 7f 05 08 10 00 00 00 98 32
> a9 7f 11 00 00 00 78 57 05 08 14 33 a9 7f a8 32 a9 7f
>     2020.06.04-17:44:27.12@0: 67 29 79 77 04 5d 05 08 6c 25 79 77 d8 32
> a9 7f e0 57 05 08 b8 32 a9 7f 1c 33 a9 7f d8 32 a9 7f
>     2020.06.04-17:44:27.12@0:
>     2020.06.04-17:44:27.12@0: code: 0x8050a8d
>     2020.06.04-17:44:27.12@0: 8b 03 ff 30 6a 01 56 e8 77 a8 ff ff 83 c4
> 0c 0f
>
> This vulnerability was initially found in long-term 6.44.6, and was fixed
> in stable 6.47.
>
> 2. reachable assertion failure
> The ipsec process suffers from an assertion failure vulnerability. There
> is a reachable assertion in the ipsec process. By sending a crafted packet,
> an authenticated remote user can crash the ipsec process due to assertion
> failure.
>
> Against stable 6.46.5, the poc resulted in the following crash dump.
>
>     # cat /rw/logs/backtrace.log
>     2020.06.04-18:25:16.04@0:
>     2020.06.04-18:25:16.04@0:
>     2020.06.04-18:25:16.04@0: /ram/pckg/security/nova/bin/ipsec
>     2020.06.04-18:25:16.04@0: --- signal=6
> --------------------------------------------
>     2020.06.04-18:25:16.04@0:
>     2020.06.04-18:25:16.04@0: eip=0x7748155b eflags=0x00000246
>     2020.06.04-18:25:16.04@0: edi=0x00000001 esi=0x77489200
> ebp=0x7f8fa450 esp=0x7f8fa448
>     2020.06.04-18:25:16.04@0: eax=0x00000000 ebx=0x00000291
> ecx=0x00000291 edx=0x00000006
>     2020.06.04-18:25:16.04@0:
>     2020.06.04-18:25:16.04@0: maps:
>     2020.06.04-18:25:16.04@0: 08048000-080b5000 r-xp 00000000 00:11 42
>       /ram/pckg/security/nova/bin/ipsec
>     2020.06.04-18:25:16.04@0: 77453000-77488000 r-xp 00000000 00:0c 964
>      /lib/libuClibc-0.9.33.2.so
>     2020.06.04-18:25:16.04@0: 7748c000-774a6000 r-xp 00000000 00:0c 960
>      /lib/libgcc_s.so.1
>     2020.06.04-18:25:16.04@0: 774a7000-774b6000 r-xp 00000000 00:0c 944
>      /lib/libuc++.so
>     2020.06.04-18:25:16.04@0: 774b7000-774b9000 r-xp 00000000 00:0c 959
>      /lib/libdl-0.9.33.2.so
>     2020.06.04-18:25:16.04@0: 774bb000-774d0000 r-xp 00000000 00:1f 15
>       /ram/pckg/dhcp/lib/libudhcp.so
>     2020.06.04-18:25:16.04@0: 774d2000-774d8000 r-xp 00000000 00:0c 951
>      /lib/liburadius.so
>     2020.06.04-18:25:16.04@0: 774d9000-77524000 r-xp 00000000 00:0c 956
>      /lib/libssl.so.1.0.0
>     2020.06.04-18:25:16.04@0: 77528000-77530000 r-xp 00000000 00:0c 950
>      /lib/libubox.so
>     2020.06.04-18:25:16.04@0: 77531000-7757d000 r-xp 00000000 00:0c 946
>      /lib/libumsg.so
>     2020.06.04-18:25:16.04@0: 77580000-7759d000 r-xp 00000000 00:0c 947
>      /lib/libucrypto.so
>     2020.06.04-18:25:16.04@0: 7759e000-776fb000 r-xp 00000000 00:0c 954
>      /lib/libcrypto.so.1.0.0
>     2020.06.04-18:25:16.04@0: 7770e000-77715000 r-xp 00000000 00:0c 958
>      /lib/ld-uClibc-0.9.33.2.so
>     2020.06.04-18:25:16.04@0:
>     2020.06.04-18:25:16.04@0: stack: 0x7f8fb000 - 0x7f8fa448
>     2020.06.04-18:25:16.04@0: 00 90 48 77 00 90 48 77 88 a4 8f 7f 77 d0
> 47 77 06 00 00 00 00 92 48 77 20 00 00 00 00 00 00 00
>     2020.06.04-18:25:16.04@0: cc a4 8f 7f e8 a4 8f 7f 84 a4 8f 7f e4 da
> 57 77 01 00 00 00 e4 da 57 77 cc a4 8f 7f 01 00 00 00
>     2020.06.04-18:25:16.04@0:
>     2020.06.04-18:25:16.04@0: code: 0x7748155b
>     2020.06.04-18:25:16.04@0: 5b 3d 00 f0 ff ff 76 0e 8b 93 cc ff ff ff
> f7 d8
>
> This vulnerability was initially found in long-term 6.44.6, and was fixed
> in stable 6.47.
>
>
> Solution
> ========
>
> Upgrade to the corresponding latest RouterOS tree version.
>
>
> References
> ==========
>
> [1] https://mikrotik.com/download/changelogs/stable-release-tree
>
>

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