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amazonAmazonALAS-2016-770
HistoryNov 18, 2016 - 12:30 p.m.

Medium: openssh

2016-11-1812:30:00
alas.aws.amazon.com
21

7.8 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

7.2 High

CVSS2

Access Vector

LOCAL

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

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

0.0004 Low

EPSS

Percentile

5.3%

Issue Overview:

It was discovered that the OpenSSH sshd daemon fetched PAM environment settings before running the login program. In configurations with UseLogin=yes and the pam_env PAM module configured to read user environment settings, a local user could use this flaw to execute arbitrary code as root.

Affected Packages:

openssh

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

New Packages:

i686:  
    openssh-clients-6.6.1p1-31.62.amzn1.i686  
    openssh-debuginfo-6.6.1p1-31.62.amzn1.i686  
    openssh-keycat-6.6.1p1-31.62.amzn1.i686  
    openssh-ldap-6.6.1p1-31.62.amzn1.i686  
    openssh-server-6.6.1p1-31.62.amzn1.i686  
    pam_ssh_agent_auth-0.9.3-9.31.62.amzn1.i686  
    openssh-6.6.1p1-31.62.amzn1.i686  
  
src:  
    openssh-6.6.1p1-31.62.amzn1.src  
  
x86_64:  
    pam_ssh_agent_auth-0.9.3-9.31.62.amzn1.x86_64  
    openssh-debuginfo-6.6.1p1-31.62.amzn1.x86_64  
    openssh-6.6.1p1-31.62.amzn1.x86_64  
    openssh-ldap-6.6.1p1-31.62.amzn1.x86_64  
    openssh-server-6.6.1p1-31.62.amzn1.x86_64  
    openssh-keycat-6.6.1p1-31.62.amzn1.x86_64  
    openssh-clients-6.6.1p1-31.62.amzn1.x86_64  

Additional References

Red Hat: CVE-2015-8325

Mitre: CVE-2015-8325

7.8 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

7.2 High

CVSS2

Access Vector

LOCAL

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

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

0.0004 Low

EPSS

Percentile

5.3%