SB2021052547 - Weak cryptography in NGINX Controller NAAS API
Published: May 25, 2021
Security Bulletin ID
SB2021052547
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG) (CVE-ID: CVE-2021-23020)
CWE-ID: CWE-338 - Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear
The vulnerability allows a local user to bypass implemented security restrictions.
the vulnerability exists due to the NAAS API keys are generated using an insecure pseudo-random string and hashing algorithm. A local user can potentially generate a valid user key.
Remediation
Install update from vendor's website.