ubuntu-cve-2016-0772
Vulnerability from osv_ubuntu
Published
2016-09-02 00:00
Modified
2026-04-22 07:37
Summary
Details
The smtplib library in CPython (aka Python) before 2.7.12, 3.x before 3.4.5, and 3.5.x before 3.5.2 does not return an error when StartTLS fails, which might allow man-in-the-middle attackers to bypass the TLS protections by leveraging a network position between the client and the registry to block the StartTLS command, aka a "StartTLS stripping attack."
Severity
6.5 (Medium)
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "idle-python2.7",
"binary_version": "2.7.6-8ubuntu0.3"
},
{
"binary_name": "libpython2.7",
"binary_version": "2.7.6-8ubuntu0.3"
},
{
"binary_name": "libpython2.7-minimal",
"binary_version": "2.7.6-8ubuntu0.3"
},
{
"binary_name": "libpython2.7-stdlib",
"binary_version": "2.7.6-8ubuntu0.3"
},
{
"binary_name": "libpython2.7-testsuite",
"binary_version": "2.7.6-8ubuntu0.3"
},
{
"binary_name": "python2.7",
"binary_version": "2.7.6-8ubuntu0.3"
},
{
"binary_name": "python2.7-examples",
"binary_version": "2.7.6-8ubuntu0.3"
},
{
"binary_name": "python2.7-minimal",
"binary_version": "2.7.6-8ubuntu0.3"
}
]
},
"package": {
"ecosystem": "Ubuntu:14.04:LTS",
"name": "python2.7",
"purl": "pkg:deb/ubuntu/python2.7@2.7.6-8ubuntu0.3?arch=source\u0026distro=trusty"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.7.6-8ubuntu0.3"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.7.5-8ubuntu3",
"2.7.5-8ubuntu4",
"2.7.6-2",
"2.7.6-2ubuntu1",
"2.7.6-3",
"2.7.6-3ubuntu1",
"2.7.6-4",
"2.7.6-4ubuntu1",
"2.7.6-5",
"2.7.6-7",
"2.7.6-8",
"2.7.6-8ubuntu0.2"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "idle-python3.4",
"binary_version": "3.4.3-1ubuntu1~14.04.5"
},
{
"binary_name": "libpython3.4",
"binary_version": "3.4.3-1ubuntu1~14.04.5"
},
{
"binary_name": "libpython3.4-minimal",
"binary_version": "3.4.3-1ubuntu1~14.04.5"
},
{
"binary_name": "libpython3.4-stdlib",
"binary_version": "3.4.3-1ubuntu1~14.04.5"
},
{
"binary_name": "libpython3.4-testsuite",
"binary_version": "3.4.3-1ubuntu1~14.04.5"
},
{
"binary_name": "python3.4",
"binary_version": "3.4.3-1ubuntu1~14.04.5"
},
{
"binary_name": "python3.4-examples",
"binary_version": "3.4.3-1ubuntu1~14.04.5"
},
{
"binary_name": "python3.4-minimal",
"binary_version": "3.4.3-1ubuntu1~14.04.5"
},
{
"binary_name": "python3.4-venv",
"binary_version": "3.4.3-1ubuntu1~14.04.5"
}
]
},
"package": {
"ecosystem": "Ubuntu:14.04:LTS",
"name": "python3.4",
"purl": "pkg:deb/ubuntu/python3.4@3.4.3-1ubuntu1~14.04.5?arch=source\u0026distro=trusty"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "3.4.3-1ubuntu1~14.04.5"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"3.4~b1-0ubuntu3",
"3.4~b1-4ubuntu4",
"3.4~b1-4ubuntu6",
"3.4~b1-5ubuntu2",
"3.4~b2-1",
"3.4~b3-1ubuntu1",
"3.4~rc1-1build1",
"3.4~rc2-1",
"3.4~rc3-0ubuntu1",
"3.4.0-1",
"3.4.0-2ubuntu1",
"3.4.0-2ubuntu1.1",
"3.4.3-1ubuntu1~14.04.1",
"3.4.3-1ubuntu1~14.04.3",
"3.4.3-1ubuntu1~14.04.4"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "idle-python3.5",
"binary_version": "3.5.2-2ubuntu0~16.04.4~14.04.1"
},
{
"binary_name": "libpython3.5",
"binary_version": "3.5.2-2ubuntu0~16.04.4~14.04.1"
},
{
"binary_name": "libpython3.5-minimal",
"binary_version": "3.5.2-2ubuntu0~16.04.4~14.04.1"
},
{
"binary_name": "libpython3.5-stdlib",
"binary_version": "3.5.2-2ubuntu0~16.04.4~14.04.1"
},
{
"binary_name": "libpython3.5-testsuite",
"binary_version": "3.5.2-2ubuntu0~16.04.4~14.04.1"
},
{
"binary_name": "python3.5",
"binary_version": "3.5.2-2ubuntu0~16.04.4~14.04.1"
},
{
"binary_name": "python3.5-examples",
"binary_version": "3.5.2-2ubuntu0~16.04.4~14.04.1"
},
{
"binary_name": "python3.5-minimal",
"binary_version": "3.5.2-2ubuntu0~16.04.4~14.04.1"
},
{
"binary_name": "python3.5-venv",
"binary_version": "3.5.2-2ubuntu0~16.04.4~14.04.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:14.04:LTS",
"name": "python3.5",
"purl": "pkg:deb/ubuntu/python3.5@3.5.2-2ubuntu0~16.04.4~14.04.1?arch=source\u0026distro=trusty"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "3.5.2-2ubuntu0~16.04.4~14.04.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": []
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "idle-python2.7",
"binary_version": "2.7.12-1ubuntu0~16.04.1"
},
{
"binary_name": "libpython2.7",
"binary_version": "2.7.12-1ubuntu0~16.04.1"
},
{
"binary_name": "libpython2.7-minimal",
"binary_version": "2.7.12-1ubuntu0~16.04.1"
},
{
"binary_name": "libpython2.7-stdlib",
"binary_version": "2.7.12-1ubuntu0~16.04.1"
},
{
"binary_name": "libpython2.7-testsuite",
"binary_version": "2.7.12-1ubuntu0~16.04.1"
},
{
"binary_name": "python2.7",
"binary_version": "2.7.12-1ubuntu0~16.04.1"
},
{
"binary_name": "python2.7-examples",
"binary_version": "2.7.12-1ubuntu0~16.04.1"
},
{
"binary_name": "python2.7-minimal",
"binary_version": "2.7.12-1ubuntu0~16.04.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:16.04:LTS",
"name": "python2.7",
"purl": "pkg:deb/ubuntu/python2.7@2.7.12-1ubuntu0~16.04.1?arch=source\u0026distro=xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.7.12-1ubuntu0~16.04.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.7.10-4ubuntu1",
"2.7.10-4ubuntu2",
"2.7.11-2",
"2.7.11-3",
"2.7.11-4",
"2.7.11-6",
"2.7.11-7",
"2.7.11-7ubuntu1",
"2.7.12-1~16.04"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "idle-python3.5",
"binary_version": "3.5.2-2ubuntu0~16.04.1"
},
{
"binary_name": "libpython3.5",
"binary_version": "3.5.2-2ubuntu0~16.04.1"
},
{
"binary_name": "libpython3.5-minimal",
"binary_version": "3.5.2-2ubuntu0~16.04.1"
},
{
"binary_name": "libpython3.5-stdlib",
"binary_version": "3.5.2-2ubuntu0~16.04.1"
},
{
"binary_name": "libpython3.5-testsuite",
"binary_version": "3.5.2-2ubuntu0~16.04.1"
},
{
"binary_name": "python3.5",
"binary_version": "3.5.2-2ubuntu0~16.04.1"
},
{
"binary_name": "python3.5-examples",
"binary_version": "3.5.2-2ubuntu0~16.04.1"
},
{
"binary_name": "python3.5-minimal",
"binary_version": "3.5.2-2ubuntu0~16.04.1"
},
{
"binary_name": "python3.5-venv",
"binary_version": "3.5.2-2ubuntu0~16.04.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:16.04:LTS",
"name": "python3.5",
"purl": "pkg:deb/ubuntu/python3.5@3.5.2-2ubuntu0~16.04.1?arch=source\u0026distro=xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "3.5.2-2ubuntu0~16.04.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"3.5.0-3",
"3.5.0-3ubuntu1",
"3.5.1~rc1-2ubuntu1",
"3.5.1-1",
"3.5.1-2",
"3.5.1-3",
"3.5.1-5",
"3.5.1-6ubuntu1",
"3.5.1-6ubuntu2",
"3.5.1-9ubuntu1",
"3.5.1-10",
"3.5.2-2~16.01",
"3.5.2-2~16.04"
]
}
],
"aliases": [],
"details": "The smtplib library in CPython (aka Python) before 2.7.12, 3.x before 3.4.5, and 3.5.x before 3.5.2 does not return an error when StartTLS fails, which might allow man-in-the-middle attackers to bypass the TLS protections by leveraging a network position between the client and the registry to block the StartTLS command, aka a \"StartTLS stripping attack.\"",
"id": "UBUNTU-CVE-2016-0772",
"modified": "2026-04-22T07:37:53Z",
"published": "2016-09-02T00:00:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2016-0772"
},
{
"type": "REPORT",
"url": "http://www.openwall.com/lists/oss-security/2016/06/14/9"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-3134-1"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2016-0772"
}
],
"related": [
"USN-3134-1"
],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2016-0772"
]
}
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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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