CVE-2018-1000808 — Pyopenssl Incorrect Memory Management

Description

Python Cryptographic Authority pyopenssl version Before 17.5.0 contains a CWE - 401 : Failure to Release Memory Before Removing Last Reference vulnerability in PKCS #12 Store that can result in Denial of service if memory runs low or is exhausted. This attack appear to be exploitable via Depends upon calling application, however it could be as simple as initiating a TLS connection. Anything that would cause the calling application to reload certificates from a PKCS #12 store.. This vulnerability appears to have been fixed in 17.5.0.

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

Debian

Security tracker ↗

Release	Package	Fixed in	Advisory
Debian 14	pyopenssl	17.5.0-1	—
Debian 13	pyopenssl	17.5.0-1	—
Debian 12	pyopenssl	17.5.0-1	—

Ubuntu

Security tracker ↗

Release	Package	Fixed in	Advisory
Ubuntu 16.04 LTS	pyopenssl	0.15.1-2ubuntu0.2	USN-3813-1

Red Hat

Security tracker ↗

Release	Package	Fixed in	Advisory
Red Hat OpenStack 13	pyOpenSSL +1	17.5.0-1.el7ost	RHSA-2019:0085

SUSE

Security tracker ↗

Release	Package	Fixed in	Advisory
SLES 12 SP5	python-pyOpenSSL	17.1.0-4.26.1	SUSE-SU-2024:1626-1
SLES 12 SP4	python-cryptography	1.3.1-7.13.4	SUSE-SU-2018:4063-1
SLES 12 SP4	python-pyOpenSSL	16.0.0-4.11.3	SUSE-SU-2018:4063-1
SLES 12 SP4	python-setuptools	18.0.1-4.8.1	SUSE-SU-2018:4063-1
SLES 12 SP3	python-cryptography	1.3.1-7.13.4	SUSE-SU-2018:4063-1
SLES 12 SP3	python-pyOpenSSL	16.0.0-4.11.3	SUSE-SU-2018:4063-1
SLES 12 SP3	python-setuptools	18.0.1-4.8.1	SUSE-SU-2018:4063-1
SLES 12 SP2	python-cryptography	1.3.1-7.13.4	SUSE-SU-2018:4063-1
SLES 12 SP2	python-pyOpenSSL	16.0.0-4.11.3	SUSE-SU-2018:4063-1
SLES 12 SP2	python-setuptools	18.0.1-4.8.1	SUSE-SU-2018:4063-1
SLES 12 SP1	python-setuptools	18.0.1-4.8.1	SUSE-SU-2018:4063-1

Show 11 more (older releases, extended support, other products)

Release	Package	Fixed in	Advisory
SLES 12	python-setuptools	18.0.1-4.8.1	SUSE-SU-2018:4063-1
SLES for SAP 12 SP5	python-pyOpenSSL	17.1.0-4.26.1	SUSE-SU-2024:1626-1
SLES for SAP 12 SP4	python-cryptography	1.3.1-7.13.4	SUSE-SU-2018:4063-1
SLES for SAP 12 SP4	python-pyOpenSSL	16.0.0-4.11.3	SUSE-SU-2018:4063-1
SLES for SAP 12 SP4	python-setuptools	18.0.1-4.8.1	SUSE-SU-2018:4063-1
SLES for SAP 12 SP3	python-cryptography	1.3.1-7.13.4	SUSE-SU-2018:4063-1
SLES for SAP 12 SP3	python-pyOpenSSL	16.0.0-4.11.3	SUSE-SU-2018:4063-1
SLES for SAP 12 SP3	python-setuptools	18.0.1-4.8.1	SUSE-SU-2018:4063-1
SLES for SAP 12 SP2	python-cryptography	1.3.1-7.13.4	SUSE-SU-2018:4063-1
SLES for SAP 12 SP2	python-pyOpenSSL	16.0.0-4.11.3	SUSE-SU-2018:4063-1
SLES for SAP 12 SP2	python-setuptools	18.0.1-4.8.1	SUSE-SU-2018:4063-1
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SUSE HPE Helion OpenStack 8	ardana-cobbler	8.0+git.1550694449.df88054-3.35.2	SUSE-RU-2019:1161-1
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SUSE HPE Helion OpenStack 8	ardana-swift	8.0+git.1551502730.f4d219d-3.24.2	SUSE-RU-2019:1161-1
SUSE HPE Helion OpenStack 8	ardana-tempest	8.0+git.1554307220.ed24e63-3.18.2	SUSE-RU-2019:1161-1
SUSE HPE Helion OpenStack 8	documentation-hpe-helion-openstack-user +5	8.20190329-1.14.2	SUSE-RU-2019:1161-1
SUSE HPE Helion OpenStack 8	galera-python-clustercheck	0.0+git.1506329536.8f5878c-4.3.2	SUSE-RU-2019:1161-1
SUSE HPE Helion OpenStack 8	openstack-dashboard	12.0.4~dev5-3.17.3	SUSE-RU-2019:1161-1
SUSE HPE Helion OpenStack 8	openstack-ec2-api	5.0.1~dev10-4.6.2	SUSE-RU-2019:1161-1
SUSE HPE Helion OpenStack 8	openstack-heat	9.0.6~dev17-3.15.3	SUSE-RU-2019:1161-1
SUSE HPE Helion OpenStack 8	openstack-heat-doc	9.0.6~dev17-3.15.2	SUSE-RU-2019:1161-1
SUSE HPE Helion OpenStack 8	openstack-heat-templates	0.0.0+git.1553459627.948e8cc-3.9.2	SUSE-RU-2019:1161-1
SUSE HPE Helion OpenStack 8	openstack-horizon-plugin-ironic-ui	3.0.4~dev3-3.6.2	SUSE-RU-2019:1161-1
SUSE HPE Helion OpenStack 8	openstack-horizon-plugin-magnum-ui	3.0.1~dev9-3.6.2	SUSE-RU-2019:1161-1
SUSE HPE Helion OpenStack 8	openstack-horizon-plugin-sahara-ui	7.0.4~dev1-3.6.2	SUSE-RU-2019:1161-1
SUSE HPE Helion OpenStack 8	openstack-ironic	9.1.7~dev7-3.15.3	SUSE-RU-2019:1161-1
SUSE HPE Helion OpenStack 8	openstack-ironic-doc	9.1.7~dev7-3.15.2	SUSE-RU-2019:1161-1
SUSE HPE Helion OpenStack 8	openstack-keystone	12.0.3~dev1-5.16.3	SUSE-RU-2019:1161-1
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SUSE HPE Helion OpenStack 8	openstack-magnum-doc	5.0.2~dev31-4.12.2	SUSE-RU-2019:1161-1
SUSE HPE Helion OpenStack 8	openstack-manila	5.0.4~dev17-3.15.3	SUSE-RU-2019:1161-1
SUSE HPE Helion OpenStack 8	openstack-manila-doc	5.0.4~dev17-3.15.2	SUSE-RU-2019:1161-1
SUSE HPE Helion OpenStack 8	openstack-monasca-api	2.2.1~dev25-3.9.3	SUSE-RU-2019:1161-1
SUSE HPE Helion OpenStack 8	openstack-monasca-notification	1.10.2~dev2-3.6.3	SUSE-RU-2019:1161-1
SUSE HPE Helion OpenStack 8	openstack-monasca-persister	1.7.1~dev8-3.6.3	SUSE-RU-2019:1161-1
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SUSE HPE Helion OpenStack 8	openstack-neutron	11.0.7~dev100-3.15.3	SUSE-RU-2019:1161-1
SUSE HPE Helion OpenStack 8	openstack-neutron-doc	11.0.7~dev100-3.15.2	SUSE-RU-2019:1161-1
SUSE HPE Helion OpenStack 8	openstack-neutron-fwaas +1	11.0.2~dev8-3.11.2	SUSE-RU-2019:1161-1
SUSE HPE Helion OpenStack 8	openstack-nova	16.1.8~dev53-3.20.3	SUSE-RU-2019:1161-1
SUSE HPE Helion OpenStack 8	openstack-nova-doc	16.1.8~dev53-3.20.2	SUSE-RU-2019:1161-1
SUSE HPE Helion OpenStack 8	openstack-octavia	1.0.5~dev1-4.15.2	SUSE-RU-2019:1161-1
SUSE HPE Helion OpenStack 8	openstack-sahara	7.0.4~dev1-3.9.3	SUSE-RU-2019:1161-1
SUSE HPE Helion OpenStack 8	openstack-sahara-doc	7.0.4~dev1-3.9.2	SUSE-RU-2019:1161-1
SUSE HPE Helion OpenStack 8	openstack-swift +1	2.15.2~dev32-3.6.2	SUSE-RU-2019:1161-1
SUSE HPE Helion OpenStack 8	openstack-tempest	17.0.0-4.6.2	SUSE-RU-2019:1161-1
SUSE HPE Helion OpenStack 8	python-cinderclient	3.1.1-3.3.2	SUSE-RU-2019:1161-1
SUSE HPE Helion OpenStack 8	python-cryptography	2.0.3-3.7.2	SUSE-RU-2019:1161-1
SUSE HPE Helion OpenStack 8	python-monasca-common	2.3.1~dev4-4.6.2	SUSE-RU-2019:1161-1
SUSE HPE Helion OpenStack 8	python-os-brick	1.15.8-3.3.2	SUSE-RU-2019:1161-1
SUSE HPE Helion OpenStack 8	venv-openstack-aodh	5.1.1~dev6-12.14.3	SUSE-RU-2019:1161-1
SUSE HPE Helion OpenStack 8	venv-openstack-barbican	5.0.2~dev2-12.15.3	SUSE-RU-2019:1161-1
SUSE HPE Helion OpenStack 8	venv-openstack-ceilometer	9.0.7~dev2-12.12.3	SUSE-RU-2019:1161-1
SUSE HPE Helion OpenStack 8	venv-openstack-cinder	11.1.2~dev58-14.15.3	SUSE-RU-2019:1161-1
SUSE HPE Helion OpenStack 8	venv-openstack-designate	5.0.3~dev6-12.13.3	SUSE-RU-2019:1161-1
SUSE HPE Helion OpenStack 8	venv-openstack-freezer	5.0.0.0~xrc2~dev2-10.10.3	SUSE-RU-2019:1161-1
SUSE HPE Helion OpenStack 8	venv-openstack-glance	15.0.2~dev9-12.13.3	SUSE-RU-2019:1161-1
SUSE HPE Helion OpenStack 8	venv-openstack-heat	9.0.6~dev17-12.15.3	SUSE-RU-2019:1161-1
SUSE HPE Helion OpenStack 8	venv-openstack-horizon-hpe	12.0.4~dev5-14.20.3	SUSE-RU-2019:1161-1
SUSE HPE Helion OpenStack 8	venv-openstack-ironic	9.1.7~dev7-12.15.3	SUSE-RU-2019:1161-1
SUSE HPE Helion OpenStack 8	venv-openstack-keystone	12.0.3~dev1-11.15.3	SUSE-RU-2019:1161-1
SUSE HPE Helion OpenStack 8	venv-openstack-magnum	5.0.2-11.13.1	SUSE-RU-2019:1161-1
SUSE HPE Helion OpenStack 8	venv-openstack-manila	5.0.4~dev17-12.17.3	SUSE-RU-2019:1161-1
SUSE HPE Helion OpenStack 8	venv-openstack-monasca	2.2.1-11.11.1	SUSE-RU-2019:1161-1
SUSE HPE Helion OpenStack 8	venv-openstack-monasca-ceilometer	1.5.1-8.9.1	SUSE-RU-2019:1161-1
SUSE HPE Helion OpenStack 8	venv-openstack-murano	4.0.1-12.9.1	SUSE-RU-2019:1161-1
SUSE HPE Helion OpenStack 8	venv-openstack-neutron	11.0.2-13.17.1	SUSE-RU-2019:1161-1
SUSE HPE Helion OpenStack 8	venv-openstack-nova	16.1.8~dev53-11.16.3	SUSE-RU-2019:1161-1
SUSE HPE Helion OpenStack 8	venv-openstack-octavia	1.0.5~dev1-12.15.3	SUSE-RU-2019:1161-1
SUSE HPE Helion OpenStack 8	venv-openstack-sahara	7.0.4~dev1-11.14.3	SUSE-RU-2019:1161-1
SUSE HPE Helion OpenStack 8	venv-openstack-swift	2.15.2-11.9.1	SUSE-RU-2019:1161-1
SUSE HPE Helion OpenStack 8	venv-openstack-trove	8.0.1~dev12-11.14.3	SUSE-RU-2019:1161-1
SUSE Enterprise Storage 4	python-cryptography	1.3.1-7.13.4	SUSE-SU-2018:4063-1
SUSE Enterprise Storage 4	python-pyOpenSSL	16.0.0-4.11.3	SUSE-SU-2018:4063-1
SUSE Enterprise Storage 4	python-setuptools	18.0.1-4.8.1	SUSE-SU-2018:4063-1

Alpine

Security tracker ↗

Release	Package	Fixed in	Advisory
Alpine v3.8	py-openssl	17.5.0-r0	—
Alpine v3.7	py-openssl	17.5.0-r0	—
Alpine v3.6	py-openssl	17.5.0-r0	—

Affected packages

Ecosystem	Package	Affected	Fixed	Record
PyPI	pyopenssl	< 17.5.0	17.5.0	GHSA-2rcm-phc9-3945

Advisories 6

RHSA-2019:0085 Red Hat Security Advisory: pyOpenSSL security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
SUSE-RU-2019:1161-1 Recommended update for ardana-ansible, ardana-cobbler, ardana-db, ardana-heat, ardana-manila, ardana-neutron, ardana-nova, ardana-octavia, ardana-osconfig, ardana-service, ardana-ses, ardana-swift, ardana-tempest, crowbar, crowbar-core, crowbar-ha, crowbar-openstack, documentation-suse-openstack-cloud, galera-python-clustercheck, openstack-dashboard, openstack-ec2-api, openstack-heat, openstack-heat-templates, openstack-horizon-plugin-ironic-ui, openstack-horizon-plugin-magnum-ui, openstack-hori SUSE / openSUSE Security Updates · Mar 23, 2026
USN-3813-1 pyopenssl vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
SUSE-SU-2024:1626-1 Security update for python-pyOpenSSL SUSE / openSUSE Security Updates · Feb 4, 2026
SUSE-SU-2018:4063-1 Security update for python-cryptography, python-pyOpenSSL SUSE / openSUSE Security Updates · Feb 4, 2026
WID-SEC-2024-1099 python-crypto: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 23, 2024

References

https://github.com/pyca/pyopenssl/pull/723
RHSA-2019:0085 vendor-advisory
USN-3813-1 vendor-advisory
openSUSE-SU-2019:1104 vendor-advisory