UBUNTU-CVE-2016-0739

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Source
https://ubuntu.com/security/CVE-2016-0739
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2016/UBUNTU-CVE-2016-0739.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2016-0739
Upstream
Downstream
Related
Published
2016-02-23T15:00:00Z
Modified
2025-07-16T08:11:55.137176Z
Severity
  • 5.9 (Medium) CVSS_V3 - CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

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."

References

Affected packages

Ubuntu:14.04:LTS / libssh

Package

Name
libssh
Purl
pkg:deb/ubuntu/libssh@0.6.1-0ubuntu3.3?arch=source&distro=trusty

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0.6.1-0ubuntu3.3

Affected versions

0.*

0.5.4-1
0.6.1-0ubuntu2
0.6.1-0ubuntu3
0.6.1-0ubuntu3.1

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "libssh-4",
            "binary_version": "0.6.1-0ubuntu3.3"
        },
        {
            "binary_name": "libssh-4-dbgsym",
            "binary_version": "0.6.1-0ubuntu3.3"
        },
        {
            "binary_name": "libssh-dbg",
            "binary_version": "0.6.1-0ubuntu3.3"
        },
        {
            "binary_name": "libssh-dev",
            "binary_version": "0.6.1-0ubuntu3.3"
        },
        {
            "binary_name": "libssh-dev-dbgsym",
            "binary_version": "0.6.1-0ubuntu3.3"
        },
        {
            "binary_name": "libssh-doc",
            "binary_version": "0.6.1-0ubuntu3.3"
        }
    ]
}

Ubuntu:16.04:LTS / libssh

Package

Name
libssh
Purl
pkg:deb/ubuntu/libssh@0.6.3-4.2ubuntu1?arch=source&distro=xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0.6.3-4.2ubuntu1

Affected versions

0.*

0.6.3-3ubuntu3
0.6.3-4.1
0.6.3-4.2

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "libssh-4",
            "binary_version": "0.6.3-4.2ubuntu1"
        },
        {
            "binary_name": "libssh-4-dbgsym",
            "binary_version": "0.6.3-4.2ubuntu1"
        },
        {
            "binary_name": "libssh-dbg",
            "binary_version": "0.6.3-4.2ubuntu1"
        },
        {
            "binary_name": "libssh-dev",
            "binary_version": "0.6.3-4.2ubuntu1"
        },
        {
            "binary_name": "libssh-dev-dbgsym",
            "binary_version": "0.6.3-4.2ubuntu1"
        },
        {
            "binary_name": "libssh-doc",
            "binary_version": "0.6.3-4.2ubuntu1"
        },
        {
            "binary_name": "libssh-gcrypt-4",
            "binary_version": "0.6.3-4.2ubuntu1"
        },
        {
            "binary_name": "libssh-gcrypt-4-dbgsym",
            "binary_version": "0.6.3-4.2ubuntu1"
        },
        {
            "binary_name": "libssh-gcrypt-dev",
            "binary_version": "0.6.3-4.2ubuntu1"
        },
        {
            "binary_name": "libssh-gcrypt-dev-dbgsym",
            "binary_version": "0.6.3-4.2ubuntu1"
        }
    ]
}