CVE-2019-11324 Improper Certificate Validation in urllib3

What is CVE-2019-11324?

CVE-2019-11324 is a high-severity vulnerability in Canonical Ubuntu Linux, published on 18 Apr 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

The urllib3 library before 1.24.2 for Python mishandles certain cases where the desired set of CA certificates is different from the OS store of CA certificates, which results in SSL connections succeeding in situations where a verification failure is the correct outcome. This is related to use of the ssl_context, ca_certs, or ca_certs_dir argument.

Weakness: CWE-295

Which versions are affected by CVE-2019-11324?

3 open source packages ship an affected version, including urllib3. It affects 2 products.

Products include Canonical Ubuntu Linux, Python Urllib3.

How do I fix CVE-2019-11324?

Upgrade urllib3 to 1.24.2 or later.

Is CVE-2019-11324 being exploited?

There is no known exploitation of CVE-2019-11324 in the wild and no public exploit code.

Other vulnerabilities in Canonical Ubuntu Linux

• CVE-2020-11651 SaltStack Salt Authentication Bypass Exploited Critical 9.8
• CVE-2020-7247 OpenSMTPD Remote Code Execution Exploited Critical 9.8
• CVE-2019-16928 Exim Out-of-bounds Write Exploited Critical 9.8
• CVE-2018-6789 Exim Buffer Overflow Exploited Critical 9.8
• CVE-2015-2590 Oracle Java SE and Java SE Embedded Remote Code Execution Exploited Critical 9.8

All Canonical Ubuntu Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2019-11324, GHSA-mh33-7rrq-662w, MINI-gh64-fc88-2547, PYSEC-2019-133, ROOT-APP-PYPI-CVE-2019-11324, UBUNTU-CVE-2019-11324 and 1 more.