CVE-2018-1000808: Python Cryptographic Authority pyopenssl version Before 17.5.0 contains a CWE - 401 : Failure to Release Memory Before Removing Last Referen
Noroxi assessment
Priority: Monitor (action score 24/100)
- The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
- Probability of exploitation in the next 30 days: 1.8% (FIRST EPSS); higher than 79.6% of all records.
- Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. Special conditions such as timing or configuration are required.
- Fixed version: n/a n/a 17.5.0.
Low priority for now. Upgrade to n/a n/a 17.5.0 or later.
Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it
Primary sources: NVD · CVE.org · FIRST EPSS
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.
- Published
- Oct 8, 2018
- Updated
- Jun 16, 2026
- EPSS
- 1.8% · 79th percentile
- CWE
- CWE-404
Report tools
Action score
24
Monitor
Low priority for now.
- CVSS
- 23 / 40 · 5.9 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 1 / 30 · 1.8%
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- No public exploit code on record
- A fix has been released
If any of these changes, we'll tell you in the daily email digest.
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Noroxi analysis
What does it mean in your environment?
The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.
We use this product, ask for helpAffected systems
Is your version affected?
Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.
| Vendor | Product | CPE |
|---|---|---|
| pyopenssl project | pyopenssl | cpe:2.3:a:pyopenssl_project:pyopenssl |
| canonical | ubuntu linux | cpe:2.3:o:canonical:ubuntu_linux |
| redhat | gluster storage | cpe:2.3:a:redhat:gluster_storage |
| redhat | openstack | cpe:2.3:a:redhat:openstack |
| redhat | enterprise linux desktop | cpe:2.3:o:redhat:enterprise_linux_desktop |
| redhat | enterprise linux server | cpe:2.3:o:redhat:enterprise_linux_server |
| redhat | enterprise linux workstation | cpe:2.3:o:redhat:enterprise_linux_workstation |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- canonical ubuntu linux16.04
- pyopenssl project pyopensslbefore 17.5.0
- redhat enterprise linux desktop7.0
- redhat enterprise linux server7.0
- redhat enterprise linux workstation7.0
- redhat gluster storage3.0
- redhat openstack13
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Alpine:v3.6 | py-openssl | before 17.5.0-r0 | 17.5.0-r0 |
| Debian:12 | pyopenssl | before 17.5.0-1 | 17.5.0-1 |
| PyPI | pyopenssl | before 17.5.0 | 17.5.0 |
| Red Hat:openstack:13::el7 | pyOpenSSL | before 0:17.5.0-1.el7ost | 0:17.5.0-1.el7ost |
| Red Hat:openstack:13::el7 | python2-pyOpenSSL | before 0:17.5.0-1.el7ost | 0:17.5.0-1.el7ost |
| SUSE:HPE Helion OpenStack 8 | ardana-ansible | before 8.0+git.1553878455.7439e04-3.58.2 | 8.0+git.1553878455.7439e04-3.58.2 |
| SUSE:HPE Helion OpenStack 8 | ardana-cobbler | before 8.0+git.1550694449.df88054-3.35.2 | 8.0+git.1550694449.df88054-3.35.2 |
| SUSE:HPE Helion OpenStack 8 | ardana-db | before 8.0+git.1550589454.df2e733-3.22.2 | 8.0+git.1550589454.df2e733-3.22.2 |
| SUSE:HPE Helion OpenStack 8 | ardana-heat | before 8.0+git.1552935705.e9a92b3-3.9.2 | 8.0+git.1552935705.e9a92b3-3.9.2 |
| SUSE:HPE Helion OpenStack 8 | ardana-manila | before 8.0+git.1551748668.7427826-1.15.2 | 8.0+git.1551748668.7427826-1.15.2 |
| SUSE:HPE Helion OpenStack 8 | ardana-neutron | before 8.0+git.1551113207.9f1db17-3.27.2 | 8.0+git.1551113207.9f1db17-3.27.2 |
| SUSE:HPE Helion OpenStack 8 | ardana-nova | before 8.0+git.1551718533.227cb9e-3.26.2 | 8.0+git.1551718533.227cb9e-3.26.2 |
| SUSE:HPE Helion OpenStack 8 | ardana-octavia | before 8.0+git.1553890679.8a50307-3.14.2 | 8.0+git.1553890679.8a50307-3.14.2 |
| SUSE:HPE Helion OpenStack 8 | ardana-osconfig | before 8.0+git.1552503158.6b6b195-3.33.2 | 8.0+git.1552503158.6b6b195-3.33.2 |
| SUSE:HPE Helion OpenStack 8 | ardana-service | before 8.0+git.1551382173.a81d5e1-3.23.2 | 8.0+git.1551382173.a81d5e1-3.23.2 |
| SUSE:HPE Helion OpenStack 8 | ardana-ses | before 8.0+git.1554145115.63a4cf2-1.17.2 | 8.0+git.1554145115.63a4cf2-1.17.2 |
| SUSE:HPE Helion OpenStack 8 | ardana-swift | before 8.0+git.1551502730.f4d219d-3.24.2 | 8.0+git.1551502730.f4d219d-3.24.2 |
| SUSE:HPE Helion OpenStack 8 | ardana-tempest | before 8.0+git.1554307220.ed24e63-3.18.2 | 8.0+git.1554307220.ed24e63-3.18.2 |
| SUSE:HPE Helion OpenStack 8 | documentation-hpe-helion-openstack-installation | before 8.20190329-1.14.2 | 8.20190329-1.14.2 |
| SUSE:HPE Helion OpenStack 8 | documentation-hpe-helion-openstack-operations | before 8.20190329-1.14.2 | 8.20190329-1.14.2 |
| SUSE:HPE Helion OpenStack 8 | documentation-hpe-helion-openstack-opsconsole | before 8.20190329-1.14.2 | 8.20190329-1.14.2 |
| SUSE:HPE Helion OpenStack 8 | documentation-hpe-helion-openstack-planning | before 8.20190329-1.14.2 | 8.20190329-1.14.2 |
| SUSE:HPE Helion OpenStack 8 | documentation-hpe-helion-openstack-security | before 8.20190329-1.14.2 | 8.20190329-1.14.2 |
| SUSE:HPE Helion OpenStack 8 | documentation-hpe-helion-openstack-user | before 8.20190329-1.14.2 | 8.20190329-1.14.2 |
+79
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| n/a n/a | 17.5.0 · description | Vendor (CNA) |
| alpine:py-openssl | 17.5.0-r0 · Alpine:v3.6 | Package registry (OSV) |
| debian:pyopenssl | 17.5.0-1 · Debian:12 | Package registry (OSV) |
| PyPI:pyopenssl | 17.5.0 | Package registry (OSV) |
| red hat:pyOpenSSL | 0:17.5.0-1.el7ost · Red Hat:openstack:13::el7 | Package registry (OSV) |
| red hat:python2-pyOpenSSL | 0:17.5.0-1.el7ost · Red Hat:openstack:13::el7 | Package registry (OSV) |
| suse:ardana-ansible | 8.0+git.1553878455.7439e04-3.58.2 · SUSE:HPE Helion OpenStack 8 | Package registry (OSV) |
| suse:ardana-cobbler | 8.0+git.1550694449.df88054-3.35.2 · SUSE:HPE Helion OpenStack 8 | Package registry (OSV) |
| suse:ardana-db | 8.0+git.1550589454.df2e733-3.22.2 · SUSE:HPE Helion OpenStack 8 | Package registry (OSV) |
| suse:ardana-heat | 8.0+git.1552935705.e9a92b3-3.9.2 · SUSE:HPE Helion OpenStack 8 | Package registry (OSV) |
| suse:ardana-manila | 8.0+git.1551748668.7427826-1.15.2 · SUSE:HPE Helion OpenStack 8 | Package registry (OSV) |
| suse:ardana-neutron | 8.0+git.1551113207.9f1db17-3.27.2 · SUSE:HPE Helion OpenStack 8 | Package registry (OSV) |
| suse:ardana-nova | 8.0+git.1551718533.227cb9e-3.26.2 · SUSE:HPE Helion OpenStack 8 | Package registry (OSV) |
| suse:ardana-octavia | 8.0+git.1553890679.8a50307-3.14.2 · SUSE:HPE Helion OpenStack 8 | Package registry (OSV) |
| suse:ardana-osconfig | 8.0+git.1552503158.6b6b195-3.33.2 · SUSE:HPE Helion OpenStack 8 | Package registry (OSV) |
| suse:ardana-service | 8.0+git.1551382173.a81d5e1-3.23.2 · SUSE:HPE Helion OpenStack 8 | Package registry (OSV) |
| suse:ardana-ses | 8.0+git.1554145115.63a4cf2-1.17.2 · SUSE:HPE Helion OpenStack 8 | Package registry (OSV) |
| suse:ardana-swift | 8.0+git.1551502730.f4d219d-3.24.2 · SUSE:HPE Helion OpenStack 8 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
No history yet (it accumulates with the daily EPSS job).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- Special conditions such as timing or configuration are required.
If successful
- Confidentiality
- none
- Integrity
- none
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- High
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- High
Weakness class (CWE)
CWE-404 · Improper Resource Shutdown or ReleaseCVSS vector
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
Change log
- Fix✗ → ✓
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References
Show all references (3 more)Show less
Vendor advisories and official records. Exploit/PoC links are deliberately left out.