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amazonAmazonALAS-2017-880
HistoryAug 31, 2017 - 3:57 p.m.

Medium: ruby23

2017-08-3115:57:00
alas.aws.amazon.com
37

CVSS2

5

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

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

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

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

EPSS

0.004

Percentile

73.1%

Issue Overview:

IV Reuse in GCM Mode:
The openssl gem for Ruby uses the same initialization vector (IV) in GCM Mode (aes-*-gcm) when the IV is set before the key, which makes it easier for context-dependent attackers to bypass the encryption protection mechanism. (CVE-2016-7798)

Affected Packages:

ruby23

Issue Correction:
Run yum update ruby23 to update your system.

New Packages:

i686:  
    ruby23-debuginfo-2.3.4-1.15.amzn1.i686  
    ruby23-devel-2.3.4-1.15.amzn1.i686  
    rubygem23-psych-2.1.0-1.15.amzn1.i686  
    rubygem23-io-console-0.4.5-1.15.amzn1.i686  
    ruby23-2.3.4-1.15.amzn1.i686  
    rubygem23-bigdecimal-1.2.8-1.15.amzn1.i686  
    ruby23-libs-2.3.4-1.15.amzn1.i686  
  
noarch:  
    ruby23-doc-2.3.4-1.15.amzn1.noarch  
    rubygems23-devel-2.5.2-1.15.amzn1.noarch  
    rubygem23-did_you_mean-1.0.0-1.15.amzn1.noarch  
    ruby23-irb-2.3.4-1.15.amzn1.noarch  
    rubygems23-2.5.2-1.15.amzn1.noarch  
  
src:  
    ruby23-2.3.4-1.15.amzn1.src  
  
x86_64:  
    ruby23-2.3.4-1.15.amzn1.x86_64  
    rubygem23-io-console-0.4.5-1.15.amzn1.x86_64  
    ruby23-devel-2.3.4-1.15.amzn1.x86_64  
    rubygem23-bigdecimal-1.2.8-1.15.amzn1.x86_64  
    ruby23-debuginfo-2.3.4-1.15.amzn1.x86_64  
    ruby23-libs-2.3.4-1.15.amzn1.x86_64  
    rubygem23-psych-2.1.0-1.15.amzn1.x86_64  

Additional References

Red Hat: CVE-2016-7798

Mitre: CVE-2016-7798

CVSS2

5

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

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

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

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

EPSS

0.004

Percentile

73.1%