Use of cryptographically weak pseudo-random number generator in Miek Gieben DNS library



| Updated: 2024-06-28
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2019-19794
CWE-ID CWE-338
Exploitation vector Network
Public exploit N/A
Vulnerable software
 DNS library in Go
Universal components / Libraries / Libraries used by multiple products

Vendor miekg

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)

EUVDB-ID: #VU93491

Risk: Medium

CVSSv4.0: 2.7 [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/E:U/U:Green]

CVE-ID: CVE-2019-19794

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

Exploit availability: No

Description

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.


Mitigation

Install updates from vendor's website.

Vulnerable software versions

DNS library in Go: All versions

CPE2.3 External links

https://github.com/coredns/coredns/issues/3519
https://github.com/coredns/coredns/issues/3547
https://github.com/miekg/dns/compare/v1.1.24...v1.1.25
https://github.com/miekg/dns/issues/1043
https://github.com/miekg/dns/pull/1044


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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