CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
AI Score
Confidence
High
EPSS
Percentile
89.0%
Issue Overview:
infinite loop via malformed DNS answers received from upstream servers (CVE-2020-12663)
insufficient control of network message volume leads to DoS (CVE-2020-12662)
Affected Packages:
unbound
Note:
This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.
Issue Correction:
Run yum update unbound to update your system.
New Packages:
aarch64:
unbound-1.6.6-1.amzn2.0.3.aarch64
unbound-devel-1.6.6-1.amzn2.0.3.aarch64
unbound-libs-1.6.6-1.amzn2.0.3.aarch64
unbound-python-1.6.6-1.amzn2.0.3.aarch64
unbound-debuginfo-1.6.6-1.amzn2.0.3.aarch64
i686:
unbound-1.6.6-1.amzn2.0.3.i686
unbound-devel-1.6.6-1.amzn2.0.3.i686
unbound-libs-1.6.6-1.amzn2.0.3.i686
unbound-python-1.6.6-1.amzn2.0.3.i686
unbound-debuginfo-1.6.6-1.amzn2.0.3.i686
src:
unbound-1.6.6-1.amzn2.0.3.src
x86_64:
unbound-1.6.6-1.amzn2.0.3.x86_64
unbound-devel-1.6.6-1.amzn2.0.3.x86_64
unbound-libs-1.6.6-1.amzn2.0.3.x86_64
unbound-python-1.6.6-1.amzn2.0.3.x86_64
unbound-debuginfo-1.6.6-1.amzn2.0.3.x86_64
Red Hat: CVE-2020-12662, CVE-2020-12663
Mitre: CVE-2020-12662, CVE-2020-12663
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Amazon Linux | 2 | aarch64 | unbound | < 1.6.6-1.amzn2.0.3 | unbound-1.6.6-1.amzn2.0.3.aarch64.rpm |
Amazon Linux | 2 | aarch64 | unbound-devel | < 1.6.6-1.amzn2.0.3 | unbound-devel-1.6.6-1.amzn2.0.3.aarch64.rpm |
Amazon Linux | 2 | aarch64 | unbound-libs | < 1.6.6-1.amzn2.0.3 | unbound-libs-1.6.6-1.amzn2.0.3.aarch64.rpm |
Amazon Linux | 2 | aarch64 | unbound-python | < 1.6.6-1.amzn2.0.3 | unbound-python-1.6.6-1.amzn2.0.3.aarch64.rpm |
Amazon Linux | 2 | aarch64 | unbound-debuginfo | < 1.6.6-1.amzn2.0.3 | unbound-debuginfo-1.6.6-1.amzn2.0.3.aarch64.rpm |
Amazon Linux | 2 | i686 | unbound | < 1.6.6-1.amzn2.0.3 | unbound-1.6.6-1.amzn2.0.3.i686.rpm |
Amazon Linux | 2 | i686 | unbound-devel | < 1.6.6-1.amzn2.0.3 | unbound-devel-1.6.6-1.amzn2.0.3.i686.rpm |
Amazon Linux | 2 | i686 | unbound-libs | < 1.6.6-1.amzn2.0.3 | unbound-libs-1.6.6-1.amzn2.0.3.i686.rpm |
Amazon Linux | 2 | i686 | unbound-python | < 1.6.6-1.amzn2.0.3 | unbound-python-1.6.6-1.amzn2.0.3.i686.rpm |
Amazon Linux | 2 | i686 | unbound-debuginfo | < 1.6.6-1.amzn2.0.3 | unbound-debuginfo-1.6.6-1.amzn2.0.3.i686.rpm |
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
AI Score
Confidence
High
EPSS
Percentile
89.0%