It was found that Python's smtplib library did not return an exception when StartTLS failed to be established in the SMTP.starttls() function. A man in the middle attacker could strip out the STARTTLS command without generating an exception on the Python SMTP client application, preventing the establishment of the TLS layer.
Find out more about CVE-2016-0772 from the MITRE CVE dictionary dictionary and NIST NVD.
| Base Score | 5.8 |
|---|---|
| Base Metrics | AV:N/AC:M/Au:N/C:P/I:P/A:N |
| Access Vector | Network |
| Access Complexity | Medium |
| Authentication | None |
| Confidentiality Impact | Partial |
| Integrity Impact | Partial |
| Availability Impact | None |
| CVSS3 Base Score | 4.8 |
|---|---|
| CVSS3 Base Metrics | CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N |
| Attack Vector | Network |
| Attack Complexity | High |
| Privileges Required | None |
| User Interaction | None |
| Scope | Unchanged |
| Confidentiality | Low |
| Integrity Impact | Low |
| Availability Impact | None |
Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).
| Platform | Errata | Release Date |
|---|---|---|
| Red Hat Software Collections for Red Hat Enterprise Linux 6 (python27-python) | RHSA-2016:1628 | 2016-08-18 |
| Red Hat Software Collections for Red Hat Enterprise Linux 6 (python33-python) | RHSA-2016:1629 | 2016-08-18 |
| Red Hat Enterprise Linux 6 (python) | RHSA-2016:1626 | 2016-08-18 |
| Red Hat Software Collections for Red Hat Enterprise Linux 6 (rh-python34-python) | RHSA-2016:1630 | 2016-08-18 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7 (python33-python) | RHSA-2016:1629 | 2016-08-18 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7 (python27-python) | RHSA-2016:1628 | 2016-08-18 |
| Red Hat Enterprise Linux 7 (python) | RHSA-2016:1626 | 2016-08-18 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7 (rh-python34-python) | RHSA-2016:1630 | 2016-08-18 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7 (rh-python35-python) | RHSA-2016:1627 | 2016-08-18 |
| Platform | Package | State |
|---|---|---|
| Red Hat Enterprise Linux 5 | python | Will not fix |
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