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amazonAmazonALAS2-2021-1651
HistoryJun 16, 2021 - 8:37 p.m.

Medium: bind

2021-06-1620:37:00
alas.aws.amazon.com
18

6.5 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

7.2 High

AI Score

Confidence

High

4 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

SINGLE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:L/Au:S/C:N/I:N/A:P

0.009 Low

EPSS

Percentile

82.7%

Issue Overview:

Incremental zone transfers (IXFR) provide a way of transferring changed portion(s) of a zone between servers. An IXFR stream containing SOA records with an owner name other than the transferred zone’s apex may cause the receiving named server to inadvertently remove the SOA record for the zone in question from the zone database. This leads to an assertion failure when the next SOA refresh query for that zone is made. (CVE-2021-25214)

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.amzn2.5.2.aarch64  
    bind-pkcs11-9.11.4-26.P2.amzn2.5.2.aarch64  
    bind-pkcs11-utils-9.11.4-26.P2.amzn2.5.2.aarch64  
    bind-pkcs11-libs-9.11.4-26.P2.amzn2.5.2.aarch64  
    bind-pkcs11-devel-9.11.4-26.P2.amzn2.5.2.aarch64  
    bind-sdb-9.11.4-26.P2.amzn2.5.2.aarch64  
    bind-libs-lite-9.11.4-26.P2.amzn2.5.2.aarch64  
    bind-libs-9.11.4-26.P2.amzn2.5.2.aarch64  
    bind-utils-9.11.4-26.P2.amzn2.5.2.aarch64  
    bind-devel-9.11.4-26.P2.amzn2.5.2.aarch64  
    bind-lite-devel-9.11.4-26.P2.amzn2.5.2.aarch64  
    bind-chroot-9.11.4-26.P2.amzn2.5.2.aarch64  
    bind-sdb-chroot-9.11.4-26.P2.amzn2.5.2.aarch64  
    bind-export-libs-9.11.4-26.P2.amzn2.5.2.aarch64  
    bind-export-devel-9.11.4-26.P2.amzn2.5.2.aarch64  
    bind-debuginfo-9.11.4-26.P2.amzn2.5.2.aarch64  
  
i686:  
    bind-9.11.4-26.P2.amzn2.5.2.i686  
    bind-pkcs11-9.11.4-26.P2.amzn2.5.2.i686  
    bind-pkcs11-utils-9.11.4-26.P2.amzn2.5.2.i686  
    bind-pkcs11-libs-9.11.4-26.P2.amzn2.5.2.i686  
    bind-pkcs11-devel-9.11.4-26.P2.amzn2.5.2.i686  
    bind-sdb-9.11.4-26.P2.amzn2.5.2.i686  
    bind-libs-lite-9.11.4-26.P2.amzn2.5.2.i686  
    bind-libs-9.11.4-26.P2.amzn2.5.2.i686  
    bind-utils-9.11.4-26.P2.amzn2.5.2.i686  
    bind-devel-9.11.4-26.P2.amzn2.5.2.i686  
    bind-lite-devel-9.11.4-26.P2.amzn2.5.2.i686  
    bind-chroot-9.11.4-26.P2.amzn2.5.2.i686  
    bind-sdb-chroot-9.11.4-26.P2.amzn2.5.2.i686  
    bind-export-libs-9.11.4-26.P2.amzn2.5.2.i686  
    bind-export-devel-9.11.4-26.P2.amzn2.5.2.i686  
    bind-debuginfo-9.11.4-26.P2.amzn2.5.2.i686  
  
noarch:  
    bind-license-9.11.4-26.P2.amzn2.5.2.noarch  
  
src:  
    bind-9.11.4-26.P2.amzn2.5.2.src  
  
x86_64:  
    bind-9.11.4-26.P2.amzn2.5.2.x86_64  
    bind-pkcs11-9.11.4-26.P2.amzn2.5.2.x86_64  
    bind-pkcs11-utils-9.11.4-26.P2.amzn2.5.2.x86_64  
    bind-pkcs11-libs-9.11.4-26.P2.amzn2.5.2.x86_64  
    bind-pkcs11-devel-9.11.4-26.P2.amzn2.5.2.x86_64  
    bind-sdb-9.11.4-26.P2.amzn2.5.2.x86_64  
    bind-libs-lite-9.11.4-26.P2.amzn2.5.2.x86_64  
    bind-libs-9.11.4-26.P2.amzn2.5.2.x86_64  
    bind-utils-9.11.4-26.P2.amzn2.5.2.x86_64  
    bind-devel-9.11.4-26.P2.amzn2.5.2.x86_64  
    bind-lite-devel-9.11.4-26.P2.amzn2.5.2.x86_64  
    bind-chroot-9.11.4-26.P2.amzn2.5.2.x86_64  
    bind-sdb-chroot-9.11.4-26.P2.amzn2.5.2.x86_64  
    bind-export-libs-9.11.4-26.P2.amzn2.5.2.x86_64  
    bind-export-devel-9.11.4-26.P2.amzn2.5.2.x86_64  
    bind-debuginfo-9.11.4-26.P2.amzn2.5.2.x86_64  

Additional References

Red Hat: CVE-2021-25214

Mitre: CVE-2021-25214

6.5 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

7.2 High

AI Score

Confidence

High

4 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

SINGLE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:L/Au:S/C:N/I:N/A:P

0.009 Low

EPSS

Percentile

82.7%