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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.84%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.0
- 7.5 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- EPSS
- 2.84% probability · 86th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-295
- Affected
- python/urllib3 · canonical/ubuntu linux
- Source
- cve@mitre.org
References
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00039.html
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00041.html
- http://www.openwall.com/lists/oss-security/2019/04/19/1Mailing List, Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:3335
- https://access.redhat.com/errata/RHSA-2019:3590
- https://github.com/urllib3/urllib3/compare/a6ec68a...1efadf4Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/06/msg00015.html
- https://lists.debian.org/debian-lts-announce/2023/10/msg00012.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NKGPJLVLVYCL4L4B4G5TIOTVK4BKPG72/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XOSA2NT4DUQDBEIWE6O7KKD24XND7TE2/
- https://usn.ubuntu.com/3990-1/Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00039.html
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00041.html
- http://www.openwall.com/lists/oss-security/2019/04/19/1Mailing List, Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:3335
- https://access.redhat.com/errata/RHSA-2019:3590
- https://github.com/urllib3/urllib3/compare/a6ec68a...1efadf4Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/06/msg00015.html
- https://lists.debian.org/debian-lts-announce/2023/10/msg00012.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NKGPJLVLVYCL4L4B4G5TIOTVK4BKPG72/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XOSA2NT4DUQDBEIWE6O7KKD24XND7TE2/
- https://usn.ubuntu.com/3990-1/Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.