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amazonAmazonALAS-2015-631
HistoryDec 15, 2015 - 1:00 p.m.

Critical: bind

2015-12-1513:00:00
alas.aws.amazon.com
37

CVSS2

7.1

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

AV:N/AC:M/Au:N/C:N/I:N/A:C

EPSS

0.955

Percentile

99.4%

Issue Overview:

An error in the parsing of incoming responses allows some records with an incorrect class to be be accepted by BIND instead of being rejected as malformed. This can trigger a REQUIRE assertion failure when those records are subsequently cached. Intentional exploitation of this condition is possible and could be used as a denial-of-service vector against servers performing recursive queries. (CVE-2015-8000)

CVE-2015-8461 was also issued today for bind, but the Amazon Linux AMI’s version of bind is not impacted by that CVE.

Affected Packages:

bind

Issue Correction:
Run yum update bind to update your system.

New Packages:

i686:  
    bind-utils-9.8.2-0.37.rc1.42.amzn1.i686  
    bind-debuginfo-9.8.2-0.37.rc1.42.amzn1.i686  
    bind-sdb-9.8.2-0.37.rc1.42.amzn1.i686  
    bind-9.8.2-0.37.rc1.42.amzn1.i686  
    bind-devel-9.8.2-0.37.rc1.42.amzn1.i686  
    bind-libs-9.8.2-0.37.rc1.42.amzn1.i686  
    bind-chroot-9.8.2-0.37.rc1.42.amzn1.i686  
  
src:  
    bind-9.8.2-0.37.rc1.42.amzn1.src  
  
x86_64:  
    bind-utils-9.8.2-0.37.rc1.42.amzn1.x86_64  
    bind-sdb-9.8.2-0.37.rc1.42.amzn1.x86_64  
    bind-debuginfo-9.8.2-0.37.rc1.42.amzn1.x86_64  
    bind-libs-9.8.2-0.37.rc1.42.amzn1.x86_64  
    bind-chroot-9.8.2-0.37.rc1.42.amzn1.x86_64  
    bind-9.8.2-0.37.rc1.42.amzn1.x86_64  
    bind-devel-9.8.2-0.37.rc1.42.amzn1.x86_64  

Additional References

Red Hat: CVE-2015-8000

Mitre: CVE-2015-8000

CVSS2

7.1

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

AV:N/AC:M/Au:N/C:N/I:N/A:C

EPSS

0.955

Percentile

99.4%