Vulnerability Description
An issue was discovered in urllib2 in Python 2.x through 2.7.17 and urllib in Python 3.x through 3.8.0. CRLF injection is possible if the attacker controls a url parameter, as demonstrated by the first argument to urllib.request.urlopen with \r\n (specifically in the host component of a URL) followed by an HTTP header. This is similar to the CVE-2019-9740 query string issue and the CVE-2019-9947 path string issue. (This is not exploitable when glibc has CVE-2016-10739 fixed.). This is fixed in: v2.7.18, v2.7.18rc1; v3.5.10, v3.5.10rc1; v3.6.11, v3.6.11rc1, v3.6.12; v3.7.8, v3.7.8rc1, v3.7.9; v3.8.3, v3.8.3rc1, v3.8.4, v3.8.4rc1, v3.8.5, v3.8.6, v3.8.6rc1.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Python | Python | >= 2.0, <= 2.7.17 |
Related Weaknesses (CWE)
References
- http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00041.htmlMailing ListTechnical Description
- https://bugs.python.org/issue30458#msg347282Issue TrackingVendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1727276Issue TrackingThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/07/msg00011.htmlMailing ListTechnical Description
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://security.netapp.com/advisory/ntap-20191107-0004/Technical Description
- https://usn.ubuntu.com/4333-1/Technical Description
- https://usn.ubuntu.com/4333-2/Technical Description
- https://www.oracle.com/security-alerts/cpuoct2020.htmlTechnical Description
- http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00041.htmlMailing ListTechnical Description
- https://bugs.python.org/issue30458#msg347282Issue TrackingVendor Advisory
FAQ
What is CVE-2019-18348?
CVE-2019-18348 is a vulnerability with a CVSS score of 6.1 (MEDIUM). An issue was discovered in urllib2 in Python 2.x through 2.7.17 and urllib in Python 3.x through 3.8.0. CRLF injection is possible if the attacker controls a url parameter, as demonstrated by the firs...
How severe is CVE-2019-18348?
CVE-2019-18348 has been rated MEDIUM with a CVSS base score of 6.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2019-18348?
Check the references section above for vendor advisories and patch information. Affected products include: Python Python.