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centosCentOS ProjectCESA-2017:2563
HistoryAug 31, 2017 - 6:50 p.m.

openssh, pam_ssh_agent_auth security update

2017-08-3118:50:28
CentOS Project
lists.centos.org
93

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

0.107 Low

EPSS

Percentile

95.1%

JSON

CentOS Errata and Security Advisory CESA-2017:2563

OpenSSH is an SSH protocol implementation supported by a number of Linux, UNIX, and similar operating systems. It includes the core files necessary for both the OpenSSH client and server.

Security Fix(es):

  • A covert timing channel flaw was found in the way OpenSSH handled authentication of non-existent users. A remote unauthenticated attacker could possibly use this flaw to determine valid user names by measuring the timing of server responses. (CVE-2016-6210)

Merged security bulletin from advisories:
https://lists.centos.org/pipermail/centos-announce/2017-August/084691.html

Affected packages:
openssh
openssh-askpass
openssh-clients
openssh-ldap
openssh-server
pam_ssh_agent_auth

Upstream details at:
https://access.redhat.com/errata/RHSA-2017:2563

OSVersionArchitecturePackageVersionFilename
CentOS6i686openssh< 5.3p1-123.el6_9openssh-5.3p1-123.el6_9.i686.rpm
CentOS6i686openssh-askpass< 5.3p1-123.el6_9openssh-askpass-5.3p1-123.el6_9.i686.rpm
CentOS6i686openssh-clients< 5.3p1-123.el6_9openssh-clients-5.3p1-123.el6_9.i686.rpm
CentOS6i686openssh-ldap< 5.3p1-123.el6_9openssh-ldap-5.3p1-123.el6_9.i686.rpm
CentOS6i686openssh-server< 5.3p1-123.el6_9openssh-server-5.3p1-123.el6_9.i686.rpm
CentOS6i686pam_ssh_agent_auth< 0.9.3-123.el6_9pam_ssh_agent_auth-0.9.3-123.el6_9.i686.rpm
CentOS6x86_64openssh< 5.3p1-123.el6_9openssh-5.3p1-123.el6_9.x86_64.rpm
CentOS6x86_64openssh-askpass< 5.3p1-123.el6_9openssh-askpass-5.3p1-123.el6_9.x86_64.rpm
CentOS6x86_64openssh-clients< 5.3p1-123.el6_9openssh-clients-5.3p1-123.el6_9.x86_64.rpm
CentOS6x86_64openssh-ldap< 5.3p1-123.el6_9openssh-ldap-5.3p1-123.el6_9.x86_64.rpm
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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

0.107 Low

EPSS

Percentile

95.1%

JSON
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