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amazonAmazonALAS-2016-668
HistoryMar 16, 2016 - 4:30 p.m.

Medium: openssh

2016-03-1616:30:00
alas.aws.amazon.com
18

6.4 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

NONE

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

5.5 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

SINGLE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

NONE

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

0.023 Low

EPSS

Percentile

89.6%

Issue Overview:

It was discovered that the OpenSSH server did not sanitize data received in requests to enable X11 forwarding. An authenticated client with restricted SSH access could possibly use this flaw to bypass intended restrictions.

Affected Packages:

openssh

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

New Packages:

i686:  
    openssh-server-6.6.1p1-23.60.amzn1.i686  
    openssh-keycat-6.6.1p1-23.60.amzn1.i686  
    openssh-debuginfo-6.6.1p1-23.60.amzn1.i686  
    openssh-6.6.1p1-23.60.amzn1.i686  
    pam_ssh_agent_auth-0.9.3-9.23.60.amzn1.i686  
    openssh-ldap-6.6.1p1-23.60.amzn1.i686  
    openssh-clients-6.6.1p1-23.60.amzn1.i686  
  
src:  
    openssh-6.6.1p1-23.60.amzn1.src  
  
x86_64:  
    openssh-keycat-6.6.1p1-23.60.amzn1.x86_64  
    pam_ssh_agent_auth-0.9.3-9.23.60.amzn1.x86_64  
    openssh-clients-6.6.1p1-23.60.amzn1.x86_64  
    openssh-ldap-6.6.1p1-23.60.amzn1.x86_64  
    openssh-6.6.1p1-23.60.amzn1.x86_64  
    openssh-server-6.6.1p1-23.60.amzn1.x86_64  
    openssh-debuginfo-6.6.1p1-23.60.amzn1.x86_64  

Additional References

Red Hat: CVE-2016-3115

Mitre: CVE-2016-3115

6.4 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

NONE

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

5.5 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

SINGLE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

NONE

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

0.023 Low

EPSS

Percentile

89.6%