pyOpenSSL: Failure to release memory before removing last reference in PKCS #12 Store
Published Oct 8, 2018
8.2
HIGHCVSS 4.0
EPSS 1.90%
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.
Affected products
No data.
Configuration 1
- < 17.5.0
Configuration 2
- 16.04
Configuration 3
- 3.0
- 13
- 7.0
- 7.0
- 7.0
No data.
Red Hat OpenStack Platform 13.0 (Queens)
pyOpenSSL-0:17.5.0-1.el7ost
Fixed · RHSA-2019:0085
Red Hat Enterprise Linux 5
pyOpenSSL
Will not fix
Red Hat Enterprise Linux 6
pyOpenSSL
Will not fix
Red Hat Enterprise Linux 7
pyOpenSSL
Will not fix
Red Hat Enterprise Linux 8
pyOpenSSL
Not affected
Red Hat OpenStack Platform 10 (Newton)
pyOpenSSL
Fix deferred
Red Hat OpenStack Platform 12 (Pike)
pyOpenSSL
Fix deferred
Red Hat OpenStack Platform 14 (Rocky)
pyOpenSSL
Affected
Red Hat Storage 3
pyOpenSSL
Fix deferred
Red Hat Virtualization 4
pyOpenSSL
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat OpenStack Platform 13.0 (Queens) | pyOpenSSL-0:17.5.0-1.el7ost | Fixed | RHSA-2019:0085 |
| Red Hat Enterprise Linux 5 | pyOpenSSL | Will not fix | n/a |
| Red Hat Enterprise Linux 6 | pyOpenSSL | Will not fix | n/a |
| Red Hat Enterprise Linux 7 | pyOpenSSL | Will not fix | n/a |
| Red Hat Enterprise Linux 8 | pyOpenSSL | Not affected | n/a |
| Red Hat OpenStack Platform 10 (Newton) | pyOpenSSL | Fix deferred | n/a |
| Red Hat OpenStack Platform 12 (Pike) | pyOpenSSL | Fix deferred | n/a |
| Red Hat OpenStack Platform 14 (Rocky) | pyOpenSSL | Affected | n/a |
| Red Hat Storage 3 | pyOpenSSL | Fix deferred | n/a |
| Red Hat Virtualization 4 | pyOpenSSL | Will not fix | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
1 other source (Red Hat) ▾
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
AV:N/AC:M/Au:N/C:N/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Table of values (12 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.90% (0.01895) | 78.88th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.90% (0.01895) | 76.85th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.25% (0.00253) | 46.66th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.28% (0.00284) | 69.55th | v3 (v2023.03.01) |
| Feb 29, 2024 | 0.28% (0.00284) | 67.96th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.31% (0.00311) | 69.27th | v3 (v2023.03.01) |
| Oct 2, 2023 | 0.31% (0.00311) | 66.53th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.32% (0.00324) | 66.05th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.02% (0.01018) | 40.69th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.02% (0.01018) | 19.50th | v2 (v2022.01.01) |
| Feb 3, 2022 | 1.29% (0.01294) | 30.79th | v5 (v2026.06.15) |
| Apr 14, 2021 | 1.29% (0.01294) | 0.00th | v1 |
References (11)
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00014.html vendor-advisoryx_refsource_SUSE
- https://access.redhat.com/errata/RHSA-2019:0085 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2018-1000808 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1640216 Issue Tracking
- https://github.com/advisories/GHSA-2rcm-phc9-3945 Advisory
- https://github.com/pyca/pyopenssl/commit/e73818600065821d588af475b024f4eb518c3509
- https://github.com/pyca/pyopenssl/pull/723 x_refsource_CONFIRMPatchThird Party Advisory
- https://github.com/pypa/advisory-database/tree/main/vulns/pyopenssl/PYSEC-2018-24.yaml
- https://nvd.nist.gov/vuln/detail/CVE-2018-1000808
- https://usn.ubuntu.com/3813-1 vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2018-1000808
| Link | Providers | Tags |
|---|---|---|
| http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00014.html | vendor-advisoryx_refsource_SUSE | |
| https://access.redhat.com/errata/RHSA-2019:0085 | vendor-advisoryx_refsource_REDHATThird Party Advisory | |
| https://access.redhat.com/security/cve/CVE-2018-1000808 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1640216 | Issue Tracking | |
| https://github.com/advisories/GHSA-2rcm-phc9-3945 | Advisory | |
| https://github.com/pyca/pyopenssl/commit/e73818600065821d588af475b024f4eb518c3509 | ||
| https://github.com/pyca/pyopenssl/pull/723 | x_refsource_CONFIRMPatchThird Party Advisory | |
| https://github.com/pypa/advisory-database/tree/main/vulns/pyopenssl/PYSEC-2018-24.yaml | ||
| https://nvd.nist.gov/vuln/detail/CVE-2018-1000808 | ||
| https://usn.ubuntu.com/3813-1 | vendor-advisoryx_refsource_UBUNTUThird Party Advisory | |
| https://www.cve.org/CVERecord?id=CVE-2018-1000808 |
Change history (0)
No recorded changes yet.