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amazonAmazonALAS2-2021-1635
HistoryMay 20, 2021 - 3:46 p.m.

Important: bind

2021-05-2015:46:00
alas.aws.amazon.com
27

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

0.05 Low

EPSS

Percentile

92.8%

JSON

Issue Overview:

A flaw was found in bind. The way DNAME records are processed may trigger the same RRset to the ANSWER section to be added more than once which causes an assertion check to fail. The highest threat from this flaw is to system availability. (CVE-2021-25215)

Affected Packages:

bind

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 bind to update your system.

New Packages:

aarch64:  
    bind-9.11.4-26.P2.amzn2.5.aarch64  
    bind-pkcs11-9.11.4-26.P2.amzn2.5.aarch64  
    bind-pkcs11-utils-9.11.4-26.P2.amzn2.5.aarch64  
    bind-pkcs11-libs-9.11.4-26.P2.amzn2.5.aarch64  
    bind-pkcs11-devel-9.11.4-26.P2.amzn2.5.aarch64  
    bind-sdb-9.11.4-26.P2.amzn2.5.aarch64  
    bind-libs-lite-9.11.4-26.P2.amzn2.5.aarch64  
    bind-libs-9.11.4-26.P2.amzn2.5.aarch64  
    bind-utils-9.11.4-26.P2.amzn2.5.aarch64  
    bind-devel-9.11.4-26.P2.amzn2.5.aarch64  
    bind-lite-devel-9.11.4-26.P2.amzn2.5.aarch64  
    bind-chroot-9.11.4-26.P2.amzn2.5.aarch64  
    bind-sdb-chroot-9.11.4-26.P2.amzn2.5.aarch64  
    bind-export-libs-9.11.4-26.P2.amzn2.5.aarch64  
    bind-export-devel-9.11.4-26.P2.amzn2.5.aarch64  
    bind-debuginfo-9.11.4-26.P2.amzn2.5.aarch64  
  
i686:  
    bind-9.11.4-26.P2.amzn2.5.i686  
    bind-pkcs11-9.11.4-26.P2.amzn2.5.i686  
    bind-pkcs11-utils-9.11.4-26.P2.amzn2.5.i686  
    bind-pkcs11-libs-9.11.4-26.P2.amzn2.5.i686  
    bind-pkcs11-devel-9.11.4-26.P2.amzn2.5.i686  
    bind-sdb-9.11.4-26.P2.amzn2.5.i686  
    bind-libs-lite-9.11.4-26.P2.amzn2.5.i686  
    bind-libs-9.11.4-26.P2.amzn2.5.i686  
    bind-utils-9.11.4-26.P2.amzn2.5.i686  
    bind-devel-9.11.4-26.P2.amzn2.5.i686  
    bind-lite-devel-9.11.4-26.P2.amzn2.5.i686  
    bind-chroot-9.11.4-26.P2.amzn2.5.i686  
    bind-sdb-chroot-9.11.4-26.P2.amzn2.5.i686  
    bind-export-libs-9.11.4-26.P2.amzn2.5.i686  
    bind-export-devel-9.11.4-26.P2.amzn2.5.i686  
    bind-debuginfo-9.11.4-26.P2.amzn2.5.i686  
  
noarch:  
    bind-license-9.11.4-26.P2.amzn2.5.noarch  
  
src:  
    bind-9.11.4-26.P2.amzn2.5.src  
  
x86_64:  
    bind-9.11.4-26.P2.amzn2.5.x86_64  
    bind-pkcs11-9.11.4-26.P2.amzn2.5.x86_64  
    bind-pkcs11-utils-9.11.4-26.P2.amzn2.5.x86_64  
    bind-pkcs11-libs-9.11.4-26.P2.amzn2.5.x86_64  
    bind-pkcs11-devel-9.11.4-26.P2.amzn2.5.x86_64  
    bind-sdb-9.11.4-26.P2.amzn2.5.x86_64  
    bind-libs-lite-9.11.4-26.P2.amzn2.5.x86_64  
    bind-libs-9.11.4-26.P2.amzn2.5.x86_64  
    bind-utils-9.11.4-26.P2.amzn2.5.x86_64  
    bind-devel-9.11.4-26.P2.amzn2.5.x86_64  
    bind-lite-devel-9.11.4-26.P2.amzn2.5.x86_64  
    bind-chroot-9.11.4-26.P2.amzn2.5.x86_64  
    bind-sdb-chroot-9.11.4-26.P2.amzn2.5.x86_64  
    bind-export-libs-9.11.4-26.P2.amzn2.5.x86_64  
    bind-export-devel-9.11.4-26.P2.amzn2.5.x86_64  
    bind-debuginfo-9.11.4-26.P2.amzn2.5.x86_64

Additional References

Red Hat: CVE-2021-25215

Mitre: CVE-2021-25215

OSVersionArchitecturePackageVersionFilename
Amazon Linux2aarch64bind< 9.11.4-26.P2.amzn2.5bind-9.11.4-26.P2.amzn2.5.aarch64.rpm
Amazon Linux2aarch64bind-pkcs11< 9.11.4-26.P2.amzn2.5bind-pkcs11-9.11.4-26.P2.amzn2.5.aarch64.rpm
Amazon Linux2aarch64bind-pkcs11-utils< 9.11.4-26.P2.amzn2.5bind-pkcs11-utils-9.11.4-26.P2.amzn2.5.aarch64.rpm
Amazon Linux2aarch64bind-pkcs11-libs< 9.11.4-26.P2.amzn2.5bind-pkcs11-libs-9.11.4-26.P2.amzn2.5.aarch64.rpm
Amazon Linux2aarch64bind-pkcs11-devel< 9.11.4-26.P2.amzn2.5bind-pkcs11-devel-9.11.4-26.P2.amzn2.5.aarch64.rpm
Amazon Linux2aarch64bind-sdb< 9.11.4-26.P2.amzn2.5bind-sdb-9.11.4-26.P2.amzn2.5.aarch64.rpm
Amazon Linux2aarch64bind-libs-lite< 9.11.4-26.P2.amzn2.5bind-libs-lite-9.11.4-26.P2.amzn2.5.aarch64.rpm
Amazon Linux2aarch64bind-libs< 9.11.4-26.P2.amzn2.5bind-libs-9.11.4-26.P2.amzn2.5.aarch64.rpm
Amazon Linux2aarch64bind-utils< 9.11.4-26.P2.amzn2.5bind-utils-9.11.4-26.P2.amzn2.5.aarch64.rpm
Amazon Linux2aarch64bind-devel< 9.11.4-26.P2.amzn2.5bind-devel-9.11.4-26.P2.amzn2.5.aarch64.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

0.05 Low

EPSS

Percentile

92.8%

JSON
Related for ALAS2-2021-1635
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