Vulnerability in Python Urllib3
CVE-2019-11324
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.
Vulnerability class: Improper Certificate Validation
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.029 (86.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 87th percentile — 86.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.028 · newest: 0.029 · change: +0.001
Affected products
- Python Urllib3
- Canonical Ubuntu Linux — versions 16.04, 18.04, 18.10
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/urllib3/urllib3/compare/a6ec68a...1efadf4 (Patch, Third Party Advisory)
- www.openwall.com/lists/oss-security/2019/04/19/1 (mailing-list, Mailing List, Third Party Advisory)
- usn.ubuntu.com/3990-1/ (vendor-advisory, Third Party Advisory)
- lists.opensuse.org/opensuse-security-announce/2019-09/msg00039.html (vendor-advisory)
- lists.opensuse.org/opensuse-security-announce/2019-09/msg00041.html (vendor-advisory)
- access.redhat.com/errata/RHSA-2019:3590 (vendor-advisory)
- access.redhat.com/errata/RHSA-2019:3335 (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.debian.org/debian-lts-announce/2021/06/msg00015.html (mailing-list)
Frequently asked questions
- What is CVE-2019-11324?
- CVE-2019-11324 is a high-severity vulnerability in Python Urllib3, classified under Improper Certificate Validation. CVSS score: 7.5/10. Published 2019-04-18.
- How severe is CVE-2019-11324?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2019-11324 known to be exploited?
- 8 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.