ghostlander Halcyon prior 1.1.1.0-hal Block Verification src/main.cpp CBlock::AddToBlockIndex access control
A vulnerability has been found in ghostlander Halcyon and classified as critical. Affected by this vulnerability is the function CBlock::AddToBlockIndex
of the file src/main.cpp of the component Block Verification. The manipulation leads to improper access controls. The CWE definition for the vulnerability is CWE-284. The weakness was disclosed 01/04/2023 as 0675b25ae9cc10b5fdc8ea3a32c642979762d45e. The advisory is shared at github.com.
This vulnerability is known as CVE-2021-4300. The attack can be launched remotely. Technical details are available. There is no exploit available. The price for an exploit might be around USD $0-$5k at the moment. MITRE ATT&CK project uses the attack technique T1068 for this issue.
It is declared as not defined. We expect the 0-day to have been worth approximately $0-$5k.
Upgrading to version 1.1.1.0-hal is able to address this issue. The updated version is ready for download at github.com. The identifier of the patch is 0675b25ae9cc10b5fdc8ea3a32c642979762d45e. The bugfix is ready for download at github.com. It is recommended to upgrade the affected component. A possible mitigation has been published even before and not after the disclosure of the vulnerability.