CVE-2019-19794

Public Exploit

Description

The miekg Go DNS package before 1.1.25, as used in CoreDNS before 1.6.6 and other products, improperly generates random numbers because math/rand is used. The TXID becomes predictable, leading to response forgeries.

References

Link	Tags
https://github.com/miekg/dns/issues/1043	issue tracking exploit third party advisory
https://github.com/coredns/coredns/issues/3519	issue tracking third party advisory
https://github.com/miekg/dns/pull/1044	third party advisory patch
https://github.com/miekg/dns/compare/v1.1.24...v1.1.25	third party advisory release notes
https://github.com/coredns/coredns/issues/3547	third party advisory

Frequently Asked Questions

What is the severity of CVE-2019-19794?: CVE-2019-19794 has been scored as a medium severity vulnerability.
How to fix CVE-2019-19794?: To fix CVE-2019-19794, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2019-19794 being actively exploited in the wild?: It is possible that CVE-2019-19794 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.

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Description

Category

CWE-338 – Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)

References

Frequently Asked Questions