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debianDebianDEBIAN:DSA-3488-1:53786
HistoryFeb 23, 2016 - 4:37 p.m.

[SECURITY] [DSA 3488-1] libssh security update

2016-02-2316:37:38
lists.debian.org
16

CVSS2

5

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

AI Score

6

Confidence

High

EPSS

0.126

Percentile

95.5%


Debian Security Advisory DSA-3488-1 [email protected]
https://www.debian.org/security/ Salvatore Bonaccorso
February 23, 2016 https://www.debian.org/security/faq


Package : libssh
CVE ID : CVE-2016-0739
Debian Bug : 815663

Aris Adamantiadis discovered that libssh, a tiny C SSH library,
incorrectly generated a short ephemeral secret for the
diffie-hellman-group1 and diffie-hellman-group14 key exchange methods.
The resulting secret is 128 bits long, instead of the recommended sizes
of 1024 and 2048 bits respectively. This flaw could allow an
eavesdropper with enough resources to decrypt or intercept SSH sessions.

For the oldstable distribution (wheezy), this problem has been fixed in
version 0.5.4-1+deb7u3. This update also includes fixes for
CVE-2014-8132 and CVE-2015-3146, which were previously scheduled for the
next wheezy point release.

For the stable distribution (jessie), this problem has been fixed in
version 0.6.3-4+deb8u2.

We recommend that you upgrade your libssh 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]

CVSS2

5

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

AI Score

6

Confidence

High

EPSS

0.126

Percentile

95.5%