CVE intelligence and bounded remediation

CVE-2018-1000807 — Pyopenssl Pyopenssl security vulnerability

High CVSS 8.1

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.

Severity
High
CVSS
8.1 (3.1)
Published
2018-10-08
CISA KEV
Not currently listed
Ecosystem
python/pypi
Weaknesses
CWE-416

Affected products

  • pyopenssl / pyopenssl
  • canonical / ubuntu_linux / 16.04
  • redhat / openstack / 13
  • redhat / enterprise_linux_desktop / 7.0
  • redhat / enterprise_linux_server / 7.0
  • redhat / enterprise_linux_workstation / 7.0

Matched remediation archetype

Use-after-free, double free, and expired resource use

This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.

Check exposure

  • Trace ownership, references, callbacks, asynchronous tasks, and teardown paths around the affected object or resource.
  • Identify reachable inputs and timing or state transitions that can release the object while references remain.
  • Confirm affected builds, allocators, feature flags, architectures, and process privileges.

Remediate safely

  • Apply the maintained ownership or lifetime fix and rebuild all artifacts containing the affected native code.
  • Use explicit ownership, safe reference management, cancellation and join semantics, and idempotent teardown.
  • Add deterministic lifetime tests plus isolated sanitizer and concurrency coverage for shutdown and error paths.

Authoritative sources

Complete CVE record and remediation plan

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