Protection Mechanism Failure

Affecting python2.7 package, versions <2.7.12~rc1-1

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NVD Description

Note: Versions mentioned in the description apply to the upstream python2.7 package. See Remediation section below for Debian:9 relevant versions.

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."

Remediation

Upgrade Debian:9 python2.7 to version 2.7.12~rc1-1 or higher.

References

CVSS Score

6.5
medium severity
  • Attack Vector
    Network
  • Attack Complexity
    High
  • Privileges Required
    None
  • User Interaction
    None
  • Scope
    Unchanged
  • Confidentiality
    Low
  • Integrity
    High
  • Availability
    None
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N/E:F
CVE
CVE-2016-0772
CWE
CWE-693
Snyk ID
SNYK-DEBIAN9-PYTHON27-306437
Disclosed
02 Sep, 2016
Published
02 Sep, 2016