CVE-2016-9015
Description
Versions 1.17 and 1.18 of the Python urllib3 library suffer from a vulnerability that can cause them, in certain configurations, to not correctly validate TLS certificates. This places users of the library with those configurations at risk of man-in-the-middle and information leakage attacks. This vulnerability affects users using versions 1.17 and 1.18 of the urllib3 library, who are using the optional PyOpenSSL support for TLS instead of the regular standard library TLS backend, and who are using OpenSSL 1.1.0 via PyOpenSSL. This is an extremely uncommon configuration, so the security impact of this vulnerability is low.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
SUSE Affected 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Affected | — |
Debian Fixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 0 |
| sid | Fixed | 0 |
| forky | Fixed | 0 |
| bullseye | Fixed | 0 |
| bookworm | Fixed | 0 |
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| PyPI | urllib3 | >=1.17,<1.18.1 | 1.18.1 |
References
- http://www.openwall.com/lists/oss-security/2016/10/27/6
- http://www.securityfocus.com/bid/93941
- https://www.suse.com/security/cve/CVE-2016-9015.html
- https://nvd.nist.gov/vuln/detail/CVE-2016-9015
- https://github.com/urllib3/urllib3/commit/c32cdbc16a9634fa0f8c829d1270301570158715
- https://github.com/pypa/advisory-database/tree/main/vulns/urllib3/PYSEC-2017-98.yaml
- https://github.com/urllib3/urllib3
- https://web.archive.org/web/20210123184150/http://www.securityfocus.com/bid/93941
- https://security-tracker.debian.org/tracker/CVE-2016-9015
CWEs
CWE-295
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.