PublicDateAtUSN: 2018-10-08
Candidate: CVE-2018-1000807
PublicDate: 2018-10-08 15:29:00 UTC
References:
 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-1000807
 https://ubuntu.com/security/notices/USN-3813-1
Description:
 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.
Ubuntu-Description:
Notes:
 mdeslaur> requires python-cryptography 2.1.4 which adds X509_up_ref, see
 mdeslaur> https://github.com/pyca/cryptography/pull/4028
Bugs:
Priority: medium
Discovered-by:
Assigned-to: mdeslaur
CVSS:
 nvd: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H [8.1 HIGH]


Patches_pyopenssl:
 upstream: https://github.com/pyca/pyopenssl/pull/723
 upstream: https://github.com/pyca/pyopenssl/commit/e73818600065821d588af475b024f4eb518c3509
upstream_pyopenssl: released (17.5.0)
precise/esm_pyopenssl: not-affected (code not present)
trusty_pyopenssl: not-affected (code not present)
trusty/esm_pyopenssl: not-affected (code not present)
xenial_pyopenssl: released (0.15.1-2ubuntu0.2)
esm-infra/xenial_pyopenssl: released (0.15.1-2ubuntu0.2)
bionic_pyopenssl: not-affected (17.5.0-1)
cosmic_pyopenssl: not-affected (17.5.0-1)
devel_pyopenssl: not-affected (17.5.0-1)