Critical severity · published Jan 4, 2023
CVE-2021-4300
ghostlander Halcyon Block Verification main.cpp AddToBlockIndex access control
9.8
CVSS
0.7%
EPSS
No
On KEV
Description
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 attack can be launched remotely. Upgrading to version 1.1.1.0-hal is able to address this issue. The identifier of the patch is 0675b25ae9cc10b5fdc8ea3a32c642979762d45e. It is recommended to upgrade the affected component. The identifier VDB-217417 was assigned to this vulnerability.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 53% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
HA
Halcyon · Halcyon Project
before 1.1.1.0 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-4300
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-4300
Patch
https://github.com/ghostlander/Halcyon/commit/0675b25ae9cc10b5fdc8ea3a32c642979762d45e
Release Notes
https://github.com/ghostlander/Halcyon/releases/tag/v1.1.1.0-hal
Permissions Required
https://vuldb.com/?ctiid.217417
Permissions Required
https://vuldb.com/?id.217417