Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG) in BTCPay Server - CVE-2021-29245
Published: May 17, 2024
Vulnerability identifier: #VU89622
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-29245
CWE-ID: CWE-338
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to BTCPay Server uses a weak method Next to produce pseudo-random values to generate a legacy API key. A remote attacker can gain unauthorized access to sensitive information on the system.
Affected software
BTCPay Server
Operational Decision Manager
Operational Decision Manager
How to mitigate CVE-2021-29245
Install updates from vendor's website.
BTCPay Server - update to 1.13.1
Operational Decision Manager - addressed in versions 8.10.5.2 Interim fix 1, 8.11.0.1 Interim fix 30, 8.11.1 Interim fix 24, 8.12.0.1 Interim fix 5
Operational Decision Manager - addressed in versions 8.10.5.2 Interim fix 1, 8.11.0.1 Interim fix 30, 8.11.1 Interim fix 24, 8.12.0.1 Interim fix 5