CVE-2018-1000808

Publication date 8 October 2018

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

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.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
pyopenssl	18.10 cosmic	Not affected
	18.04 LTS bionic	Not affected
	16.04 LTS xenial	Fixed 0.15.1-2ubuntu0.2
	14.04 LTS trusty	Not affected

Notes

mdeslaur

requires python-cryptography 2.1.4 which adds X509_up_ref, see https://github.com/pyca/cryptography/pull/4028

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
pyopenssl	Upstream: https://github.com/pyca/pyopenssl/pull/723 Upstream: e738186

Severity score breakdown

Parameter	Value
Base score	5.9 · Medium
Attack vector	Network
Attack complexity	High
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H