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amazonAmazonALAS2-2020-1430
HistoryMay 19, 2020 - 6:32 p.m.

Important: unbound

2020-05-1918:32:00
alas.aws.amazon.com
10

7.5 High

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

7.9 High

AI Score

Confidence

High

5 Medium

CVSS2

Access Vector

NETWORK

Access 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

0.017 Low

EPSS

Percentile

87.7%

JSON

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

Additional References

Red Hat: CVE-2020-12662, CVE-2020-12663

Mitre: CVE-2020-12662, CVE-2020-12663

OSVersionArchitecturePackageVersionFilename
Amazon Linux2aarch64unbound< 1.6.6-1.amzn2.0.3unbound-1.6.6-1.amzn2.0.3.aarch64.rpm
Amazon Linux2aarch64unbound-devel< 1.6.6-1.amzn2.0.3unbound-devel-1.6.6-1.amzn2.0.3.aarch64.rpm
Amazon Linux2aarch64unbound-libs< 1.6.6-1.amzn2.0.3unbound-libs-1.6.6-1.amzn2.0.3.aarch64.rpm
Amazon Linux2aarch64unbound-python< 1.6.6-1.amzn2.0.3unbound-python-1.6.6-1.amzn2.0.3.aarch64.rpm
Amazon Linux2aarch64unbound-debuginfo< 1.6.6-1.amzn2.0.3unbound-debuginfo-1.6.6-1.amzn2.0.3.aarch64.rpm
Amazon Linux2i686unbound< 1.6.6-1.amzn2.0.3unbound-1.6.6-1.amzn2.0.3.i686.rpm
Amazon Linux2i686unbound-devel< 1.6.6-1.amzn2.0.3unbound-devel-1.6.6-1.amzn2.0.3.i686.rpm
Amazon Linux2i686unbound-libs< 1.6.6-1.amzn2.0.3unbound-libs-1.6.6-1.amzn2.0.3.i686.rpm
Amazon Linux2i686unbound-python< 1.6.6-1.amzn2.0.3unbound-python-1.6.6-1.amzn2.0.3.i686.rpm
Amazon Linux2i686unbound-debuginfo< 1.6.6-1.amzn2.0.3unbound-debuginfo-1.6.6-1.amzn2.0.3.i686.rpm
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7.5 High

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

7.9 High

AI Score

Confidence

High

5 Medium

CVSS2

Access Vector

NETWORK

Access 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

0.017 Low

EPSS

Percentile

87.7%

JSON
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