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CVE-2016-0739

Publication date 23 February 2016

Last updated 24 July 2024

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

5.9 · Medium

Score breakdown

libssh before 0.7.3 improperly truncates ephemeral secrets generated for the (1) diffie-hellman-group1 and (2) diffie-hellman-group14 key exchange methods to 128 bits, which makes it easier for man-in-the-middle attackers to decrypt or intercept SSH sessions via unspecified vectors, aka a "bits/bytes confusion bug."

Read the notes from the security team

Status

Package Ubuntu Release Status
libssh 16.10 yakkety
Fixed 0.6.3-4.2ubuntu1
16.04 LTS xenial
Fixed 0.6.3-4.2ubuntu1
15.10 wily
Fixed 0.6.3-3ubuntu3.2
14.04 LTS trusty
Fixed 0.6.1-0ubuntu3.3
12.04 LTS precise
Fixed 0.5.2-1ubuntu0.12.04.6

Notes

tyhicks

affects "all versions of libssh 0.1 and later"

Severity score breakdown

Parameter Value
Base score 5.9 · Medium
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact None
Availability impact None
Vector CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N