#VU76283 Out-of-bounds write in MikroTik RouterOS - CVE-2023-32154

Vulnerability identifier: #VU76283

Vulnerability risk: High

CVSSv4.0: 6.3 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2023-32154

CWE-ID: CWE-787

Exploitation vector: Local network

Exploit availability: No

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

Vendor: MikroTik

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error within the Router Advertisement Daemon. A remote attacker on the local network can send specially crafted packets to the device, trigger an out-of-bounds write and execute arbitrary code on the target system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

MikroTik RouterOS: 6.0, 6.1, 6.2, 6.3, 6.4, 6.5, 6.6, 6.7, 6.9, 6.10, 6.11, 6.12, 6.13, 6.14, 6.15, 6.16, 6.17, 6.18, 6.19, 6.20, 6.21.1, 6.22, 6.23, 6.24, 6.25, 6.26, 6.27, 6.28, 6.29 - 6.29.1, 6.30 - 6.30.4, 6.32.1 - 6.32.4, 6.33 - 6.33.6, 6.34 - 6.34.6, 6.35 - 6.35.4, 6.36 - 6.36.4, 6.37 - 6.37.5, 6.38 - 6.38.7, 6.39 - 6.39.3, 6.40 - 6.40.9, 6.41 - 6.41.4, 6.42 - 6.42.12, 6.43 - 6.43.16, 6.44 - 6.44.6, 6.45 - 6.45.9, 6.46 - 6.46.8, 6.47 - 6.47.10, 6.48 - 6.48.6, 6.49 - 6.49.7, 7.0.9, 7.1 - 7.1.5, 7.2 - 7.2.3, 7.3 - 7.3.1, 7.4 - 7.4.1, 7.5, 7.6, 7.7, 7.8, 7.9

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External links
https://www.zerodayinitiative.com/advisories/ZDI-23-710/

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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 local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.