SB2019121320 - Use of cryptographically weak pseudo-random number generator in Miek Gieben DNS library
Published: December 13, 2019 Updated: June 28, 2024
Security Bulletin ID
SB2019121320
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-2019-19794)
CWE-ID: CWE-338 - Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)
CVSSv4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to poison DNS cache.
The vulnerability exists due to usage of predictable random numbers for TXID. A remote attacker can forge DNS responses.
Remediation
Install update from vendor's website.