Vulnerability identifier: #VU50245

Vulnerability risk: Medium

CVSSv3.1: 6.9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:U/RC:C]

CVE-ID: N/A

CWE-ID: CWE-835

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
OpenWrt
Operating systems & Components / Operating system

Vendor: openwrt.org

Description

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

The vulnerability exists due to infinite loop when processing IPv6 packets on point-to-point links in netifd and odhcp6c packages. A remote attacker can send a specially crafted packet and and cause denial of service conditions.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

OpenWrt: 19.07.0 - 19.07.6

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External links
http://openwrt.org/advisory/2021-02-02-1

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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.