SB2019092409 - Weak pseudo-random number generator in Apereo CAS
Published: September 24, 2019
Security Bulletin ID
SB2019092409
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote 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-2019-10754)
CWE-ID: CWE-338 - Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/U:Green
The vulnerability allows a remote attacker to bypass authentication.
The vulnerability exists due to the application generates tokens using a weak cryptographic algorithm provided by Apache commons-lang3 RandomStringUtils. A remote attacker can guess randomly generate tokens and bypass security restriction that rely on these tokens.
Remediation
Install update from vendor's website.