By spoofing the target resolver with responses that have a malformed EdDSA signature, an attacker can trigger a small memory leak. It is possible to gradually erode available memory to the point where named crashes for lack of resources.
By spoofing the target resolver with responses that have a malformed EdDSA signature, an attacker can trigger a small memory leak. It is possible to gradually erode available memory to the point where named crashes for lack of resources.
Open Source Branch 9.9 9.9.12 through versions up to and including 9.9.13
Open Source Branch 9.10 9.10.7 through versions up to and including 9.10.8
Open Source Branches 9.11 through 9.16 9.11.3 through versions before 9.16.33
Open Source Branch 9.18 9.18.0 through versions before 9.18.7
Supported Preview Branch 9.11-S 9.11.4-S1 through versions up to and including 9.11.37-S1
Supported Preview Branch 9.16-S 9.16.8-S1 through versions before 9.16.33-S1
Development Branch 9.19 9.19.0 through versions before 9.19.5
Problem Types
Type
CWE ID
Description
text
N/A
In BIND 9.9.12 -> 9.9.13, 9.10.7 -> 9.10.8, 9.11.3 -> 9.16.32, 9.18.0 -> 9.18.6, versions 9.11.4-S1 -> 9.11.37-S1, 9.16.8-S1 -> 9.16.32-S1 of the BIND Supported Preview Edition, and versions 9.19.0 -> 9.19.4 of the BIND 9.19 development branch, the DNSSEC verification code for the EdDSA algorithm leaks memory when there is a signature length mismatch.
Type: text
CWE ID: N/A
Description: In BIND 9.9.12 -> 9.9.13, 9.10.7 -> 9.10.8, 9.11.3 -> 9.16.32, 9.18.0 -> 9.18.6, versions 9.11.4-S1 -> 9.11.37-S1, 9.16.8-S1 -> 9.16.32-S1 of the BIND Supported Preview Edition, and versions 9.19.0 -> 9.19.4 of the BIND 9.19 development branch, the DNSSEC verification code for the EdDSA algorithm leaks memory when there is a signature length mismatch.
Metrics
Version
Base score
Base severity
Vector
3.1
7.5
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Version:3.1
Base score:7.5
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Metrics Other Info
Impacts
CAPEC ID
Description
Solutions
Upgrade to the patched release most closely related to your current version of BIND: BIND 9.16.33, BIND 9.18.7, BIND 9.19.5, or for BIND Supported Preview Edition (a special feature preview branch of BIND provided to eligible ISC support customers): BIND 9.16.33-S1.
Configurations
Workarounds
Disable the following algorithms in your configuration using the disable-algorithms option: ED25519, ED448. Note that this causes zones signed with these algorithms to be treated as insecure.
Exploits
This flaw was discovered in internal testing. We are not aware of any active exploits.
By spoofing the target resolver with responses that have a malformed EdDSA signature, an attacker can trigger a small memory leak. It is possible to gradually erode available memory to the point where named crashes for lack of resources.