Description
In specific circumstances, due to a weakness in the Pseudo Random Number Generator (PRNG) that is used, it is possible for an attacker to predict the source port and query ID that BIND will use. This issue affects BIND 9 versions 9.16.0 through 9.16.50, 9.18.0 through 9.18.39, 9.20.0 through 9.20.13, 9.21.0 through 9.21.12, 9.16.8-S1 through 9.16.50-S1, 9.18.11-S1 through 9.18.39-S1, and 9.20.9-S1 through 9.20.13-S1.
CVSS breakdown
CVSS 3.1
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
None
Integrity
High
Availability
None
Affected products
- ISC / BIND 99.16.0 – 9.16.50
- ISC / BIND 99.18.0 – 9.18.39
- ISC / BIND 99.20.0 – 9.20.13
- ISC / BIND 99.21.0 – 9.21.12
- ISC / BIND 99.16.8-S1 – 9.16.50-S1
- ISC / BIND 99.18.11-S1 – 9.18.39-S1
- ISC / BIND 99.20.9-S1 – 9.20.13-S1