CVE-2018-1000808

Name: CVE-2018-1000808
Creator: NVD / NIST
Published: 2018-10-08T15:29:00.947+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.90%

Last modified Jun 17, 2026

CVE-2018-1000808 is a vulnerability of currently unknown severity. 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. EPSS estimates a 1.90% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability

1.90%

77.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-404

Affected Software

Vendor	Product	Versions
Pyopenssl Project	Pyopenssl	< 17.5.0
Canonical	Ubuntu Linux	16.04
Redhat	Gluster Storage	3.0
Redhat	Openstack	13
Redhat	Enterprise Linux Desktop	7.0
Redhat	Enterprise Linux Server	7.0
Redhat	Enterprise Linux Workstation	7.0

References

http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00014.html
https://access.redhat.com/errata/RHSA-2019:0085Third Party Advisory
https://github.com/pyca/pyopenssl/pull/723Patch, Third Party Advisory
https://usn.ubuntu.com/3813-1/Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00014.html
https://access.redhat.com/errata/RHSA-2019:0085Third Party Advisory
https://github.com/pyca/pyopenssl/pull/723Patch, Third Party Advisory
https://usn.ubuntu.com/3813-1/Third Party Advisory

Timeline

Published: Oct 8, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-1000808?

How severe is CVE-2018-1000808?

Severity scoring for CVE-2018-1000808 is pending analysis. The EPSS model estimates a 1.90% probability of exploitation in the next 30 days.

How do I fix CVE-2018-1000808?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-1000808?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST