VULNERABILITY

FreeBSD: VID-9E2D0DCF-9926-11E8-A92D-0050562A4D7B (CVE-2018-10903): py-cryptography -- tag forgery vulnerability

Try Surface Command Get a continuous 360° view of your attack surface
Back to Search

FreeBSD: VID-9E2D0DCF-9926-11E8-A92D-0050562A4D7B (CVE-2018-10903): py-cryptography -- tag forgery vulnerability

Severity
5
CVSS
(AV:N/AC:L/Au:N/C:P/I:N/A:N)
Published
07/17/2018
Created
03/19/2019
Added
08/06/2018
Modified
05/07/2019

Description

A flaw was found in python-cryptography versions between >=1.9.0 and <2.3. The finalize_with_tag API did not enforce a minimum tag length. If a user did not validate the input length prior to passing it to finalize_with_tag an attacker could craft an invalid payload with a shortened tag (e.g. 1 byte) such that they would have a 1 in 256 chance of passing the MAC check. GCM tag forgeries can cause key leakage.

Solution(s)

  • freebsd-upgrade-package-py27-cryptography
  • freebsd-upgrade-package-py34-cryptography
  • freebsd-upgrade-package-py35-cryptography
  • freebsd-upgrade-package-py36-cryptography
  • freebsd-upgrade-package-py37-cryptography

References

  • USN-3720-1
  • CVE-2018-10903

insightVM

Advanced vulnerability management analytics and reporting.
Key Features
  • Lightweight Endpoint Agent
  • Live Dashboards
  • Real Risk Prioritization
  • IT-Integrated Remediation Projects
  • Cloud, Virtual, and Container Assessment
  • Integrated Threat Feeds
  • Easy-to-Use RESTful API
  • Automation-Assisted Patching
  • Automated Containment
Free InsightVM Trial View All Features

With Rapid7 live dashboards, I have a clear view of all the assets on my network, which ones can be exploited, and what I need to do in order to reduce the risk in my environment in real-time. No other tool gives us that kind of value and insight.

– Scott Cheney, Manager of Information Security, Sierra View Medical Center

;