Your submission was sent successfully! Close

You have successfully unsubscribed! Close

Thank you for signing up for our newsletter!
In these regular emails you will find the latest updates about Ubuntu and upcoming events where you can meet our team.Close

CVE-2018-1000807

Published: 8 October 2018

Python Cryptographic Authority pyopenssl version prior to version 17.5.0 contains a CWE-416: Use After Free vulnerability in X509 object handling that can result in Use after free can lead to possible denial of service or remote code execution.. This attack appear to be exploitable via Depends on the calling application and if it retains a reference to the memory.. This vulnerability appears to have been fixed in 17.5.0.

Notes

AuthorNote
mdeslaur
requires python-cryptography 2.1.4 which adds X509_up_ref, see
https://github.com/pyca/cryptography/pull/4028

Priority

Medium

Cvss 3 Severity Score

8.1

Score breakdown

Status

Package Release Status
pyopenssl
Launchpad, Ubuntu, Debian
upstream
Released (17.5.0)
trusty Not vulnerable
(code not present)
xenial
Released (0.15.1-2ubuntu0.2)
bionic Not vulnerable
(17.5.0-1)
cosmic Not vulnerable
(17.5.0-1)
Patches:
upstream: https://github.com/pyca/pyopenssl/pull/723
upstream: https://github.com/pyca/pyopenssl/commit/e73818600065821d588af475b024f4eb518c3509

Severity score breakdown

Parameter Value
Base score 8.1
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H