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amazonAmazonALAS-2016-750
HistorySep 27, 2016 - 10:30 a.m.

Medium: openvpn

2016-09-2710:30:00
alas.aws.amazon.com
54

4.3 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

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

5.9 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

0.005 Low

EPSS

Percentile

76.9%

JSON

Issue Overview:

Ciphers with 64-bit block sizes used in CBC mode were found to be vulnerable to a birthday attack when key renegotiation doesn’t happen frequently or at all in long running connections. The blowfish cipher as used in OpenVPN by default is vulnerable to this attack, allowing a remote attacker to recover partial plaintext information (XOR of two plaintext blocks).

Affected Packages:

openvpn

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

New Packages:

i686:  
    openvpn-debuginfo-2.3.12-1.16.amzn1.i686  
    openvpn-2.3.12-1.16.amzn1.i686  
  
src:  
    openvpn-2.3.12-1.16.amzn1.src  
  
x86_64:  
    openvpn-2.3.12-1.16.amzn1.x86_64  
    openvpn-debuginfo-2.3.12-1.16.amzn1.x86_64

Additional References

Red Hat: CVE-2016-6329

Mitre: CVE-2016-6329

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Amazon Linux AMI : openvpn (ALAS-2016-750) (SWEET32)
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4.3 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

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

5.9 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

0.005 Low

EPSS

Percentile

76.9%

JSON
Related for ALAS-2016-750
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