CVE-2018-1000808: Medium severity Pyopenssl Project Pyopenssl vulnerability
It was discovered that pyOpenSSL incorrectly handled memory when performing operations on a PKCS #12 store. A remote attacker could possibly use this issue to cause pyOpenSSL to consume resources, resulting in a denial of service.
This attack appear to be exploitable via Depends upon calling application, however it could be as simple as initiating a TLS connection 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.
Other sources
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.
— Launchpad
Python Cryptographic Authority pyopenssl version before 17.5.0 fails to release memory before removing last reference in PKCS #12 Store. This can result in a Denial of service if memory runs low or is exhausted.
Upstream issue:
https://github.com/pyca/pyopenssl/pull/723
— Red Hat
Affected Software
Remediation
Patch Available
Event History
Frequently Asked Questions
What is the vulnerability ID for pyOpenSSL?
The vulnerability ID for pyOpenSSL is CVE-2018-1000808.
What is the severity rating of CVE-2018-1000808?
CVE-2018-1000808 has a severity rating of 5.9, which is considered medium.
How can CVE-2018-1000808 be exploited?
CVE-2018-1000808 can be exploited by an attacker when memory runs low or is exhausted in the PKCS #12 Store, resulting in a denial of service.
How can I fix the CVE-2018-1000808 vulnerability in pyOpenSSL?
To fix the CVE-2018-1000808 vulnerability in pyOpenSSL, update to version 17.5.0 or above.
Where can I find more information about CVE-2018-1000808?
You can find more information about CVE-2018-1000808 at the following references: [NVD](https://nvd.nist.gov/vuln/detail/CVE-2018-1000808), [GitHub](https://github.com/pyca/pyopenssl/pull/723), [Red Hat](https://access.redhat.com/errata/RHSA-2019:0085).