id: GO-2020-0008
modules:
    - module: github.com/miekg/dns
      versions:
        - fixed: 1.1.25-0.20191211073109-8ebf2e419df7
      vulnerable_at: 1.1.24
      packages:
        - package: github.com/miekg/dns
          symbols:
            - id
          derived_symbols:
            - Msg.SetAxfr
            - Msg.SetIxfr
            - Msg.SetNotify
            - Msg.SetQuestion
            - Msg.SetUpdate
summary: Insecure generation of random numbers in github.com/miekg/dns
description: |-
    DNS message transaction IDs are generated using math/rand which makes them
    relatively predictable. This reduces the complexity of response spoofing attacks
    against DNS clients.
published: 2021-04-14T20:04:52Z
cves:
    - CVE-2019-19794
ghsas:
    - GHSA-44r7-7p62-q3fr
references:
    - fix: https://github.com/miekg/dns/pull/1044
    - fix: https://github.com/miekg/dns/commit/8ebf2e419df7857ac8919baa05248789a8ffbf33
    - web: https://github.com/miekg/dns/issues/1037
    - web: https://github.com/miekg/dns/issues/1043