[SECURITY] [DSA 3626-1] openssh security update

2016-07-2409:19:18

lists.debian.org

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

4.3 Medium

CVSS2

Access Vector

NETWORK

Access 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

JSON

Debian Security Advisory DSA-3626-1 [email protected]
https://www.debian.org/security/ Salvatore Bonaccorso
July 24, 2016 https://www.debian.org/security/faq

Package : openssh
CVE ID : CVE-2016-6210
Debian Bug : 831902

Eddie Harari reported that the OpenSSH SSH daemon allows user
enumeration through timing differences when trying to authenticate
users. When sshd tries to authenticate a non-existing user, it will pick
up a fixed fake password structure with a hash based on the Blowfish
algorithm. If real users passwords are hashed using SHA256/SHA512, then
a remote attacker can take advantage of this flaw by sending large
passwords, receiving shorter response times from the server for
non-existing users.

For the stable distribution (jessie), this problem has been fixed in
version 1:6.7p1-5+deb8u3.

For the unstable distribution (sid), this problem has been fixed in
version 1:7.2p2-6.

We recommend that you upgrade your openssh packages.

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/

Mailing list: [email protected]

OSVersionArchitecturePackageVersionFilename
Debian8i386openssh-server-udeb< 6.7p1-5+deb8u3openssh-server-udeb_6.7p1-5+deb8u3_i386.deb
Debian8arm64openssh-sftp-server< 6.7p1-5+deb8u3openssh-sftp-server_6.7p1-5+deb8u3_arm64.deb
Debian8amd64openssh-server< 6.7p1-5+deb8u3openssh-server_6.7p1-5+deb8u3_amd64.deb
Debian7allopenssh< 1:6.0p1-4+deb7u5openssh_1:6.0p1-4+deb7u5_all.deb
Debian8s390xopenssh-server< 6.7p1-5+deb8u3openssh-server_6.7p1-5+deb8u3_s390x.deb
Debian8ppc64elopenssh-client< 6.7p1-5+deb8u3openssh-client_6.7p1-5+deb8u3_ppc64el.deb
Debian8armelopenssh-server-udeb< 6.7p1-5+deb8u3openssh-server-udeb_6.7p1-5+deb8u3_armel.deb
Debian7armelopenssh-client-udeb< 6.0p1-4+deb7u5openssh-client-udeb_6.0p1-4+deb7u5_armel.deb
Debian8kfreebsd-i386openssh-sftp-server< 6.7p1-5+deb8u3openssh-sftp-server_6.7p1-5+deb8u3_kfreebsd-i386.deb
Debian7allssh< 6.0p1-4+deb7u5ssh_6.0p1-4+deb7u5_all.deb

OS	Version	Architecture	Package	Version	Filename
Debian	8	i386	openssh-server-udeb	< 6.7p1-5+deb8u3	openssh-server-udeb_6.7p1-5+deb8u3_i386.deb
Debian	8	arm64	openssh-sftp-server	< 6.7p1-5+deb8u3	openssh-sftp-server_6.7p1-5+deb8u3_arm64.deb
Debian	8	amd64	openssh-server	< 6.7p1-5+deb8u3	openssh-server_6.7p1-5+deb8u3_amd64.deb
Debian	7	all	openssh	< 1:6.0p1-4+deb7u5	openssh_1:6.0p1-4+deb7u5_all.deb
Debian	8	s390x	openssh-server	< 6.7p1-5+deb8u3	openssh-server_6.7p1-5+deb8u3_s390x.deb
Debian	8	ppc64el	openssh-client	< 6.7p1-5+deb8u3	openssh-client_6.7p1-5+deb8u3_ppc64el.deb
Debian	8	armel	openssh-server-udeb	< 6.7p1-5+deb8u3	openssh-server-udeb_6.7p1-5+deb8u3_armel.deb
Debian	7	armel	openssh-client-udeb	< 6.0p1-4+deb7u5	openssh-client-udeb_6.0p1-4+deb7u5_armel.deb
Debian	8	kfreebsd-i386	openssh-sftp-server	< 6.7p1-5+deb8u3	openssh-sftp-server_6.7p1-5+deb8u3_kfreebsd-i386.deb
Debian	7	all	ssh	< 6.0p1-4+deb7u5	ssh_6.0p1-4+deb7u5_all.deb