Medium severity · published Sep 2, 2016
CVE-2016-0772
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…
6.5
CVSS
15.4%
EPSS
No
On KEV
Description
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."
CVSS vector
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)15.4% · higher than 97% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PY
Python · Python
3.5.0; 3.5.1; 3.0; 3.0.1; 3.1.0; 3.1.1; +24 more · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2016-0772
CVE.org
https://www.cve.org/CVERecord?id=CVE-2016-0772
lists.opensuse.org
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00040.html
rhn.redhat.com
http://rhn.redhat.com/errata/RHSA-2016-1626.html
rhn.redhat.com
http://rhn.redhat.com/errata/RHSA-2016-1627.html
rhn.redhat.com
http://rhn.redhat.com/errata/RHSA-2016-1628.html
rhn.redhat.com
http://rhn.redhat.com/errata/RHSA-2016-1629.html
rhn.redhat.com
http://rhn.redhat.com/errata/RHSA-2016-1630.html
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