CVE-2019-9740

Public Exploit

Description

An issue was discovered in urllib2 in Python 2.x through 2.7.16 and urllib in Python 3.x through 3.7.3. 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 query string after a ? character) followed by an HTTP header or a Redis command. This is fixed in: v2.7.17, v2.7.17rc1, v2.7.18, v2.7.18rc1; v3.5.10, v3.5.10rc1, v3.5.8, v3.5.8rc1, v3.5.8rc2, v3.5.9; v3.6.10, v3.6.10rc1, v3.6.11, v3.6.11rc1, v3.6.12, v3.6.9, v3.6.9rc1; v3.7.4, v3.7.4rc1, v3.7.4rc2, v3.7.5, v3.7.5rc1, v3.7.6, v3.7.6rc1, v3.7.7, v3.7.7rc1, v3.7.8, v3.7.8rc1, v3.7.9.

Category

6.1
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 6.31% Top 10%
Vendor Advisory fedoraproject.org Vendor Advisory redhat.com Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory redhat.com Vendor Advisory ubuntu.com Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory ubuntu.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory gentoo.org Vendor Advisory python.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://www.securityfocus.com/bid/107466 third party advisory vdb entry
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JXASHCDD4PQFKTMKQN4YOP5ZH366ABN4/ vendor advisory
https://access.redhat.com/errata/RHSA-2019:1260 third party advisory vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JMWSKTNOHSUOT3L25QFJAVCFYZX46FYK/ vendor advisory
https://lists.debian.org/debian-lts-announce/2019/06/msg00022.html third party advisory mailing list
https://lists.debian.org/debian-lts-announce/2019/06/msg00023.html third party advisory mailing list
https://lists.debian.org/debian-lts-announce/2019/06/msg00026.html third party advisory mailing list
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/44TS66GJMO5H3RLMVZEBGEFTB6O2LJJU/ vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2ORNTF62QPLMJXIQ7KTZQ2776LMIXEKL/ vendor advisory
https://access.redhat.com/errata/RHSA-2019:2030 third party advisory vendor advisory
https://usn.ubuntu.com/4127-2/ third party advisory vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00039.html vendor advisory mailing list third party advisory
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00041.html vendor advisory mailing list third party advisory
https://usn.ubuntu.com/4127-1/ third party advisory vendor advisory
https://seclists.org/bugtraq/2019/Oct/29 third party advisory mailing list
https://access.redhat.com/errata/RHSA-2019:3335 third party advisory vendor advisory
https://access.redhat.com/errata/RHSA-2019:3520 third party advisory vendor advisory
https://access.redhat.com/errata/RHSA-2019:3725 third party advisory vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/M34WOYCDKTDE5KLUACE2YIEH7D37KHRX/ vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JCPGLTTOBB3QEARDX4JOYURP6ELNNA2V/ vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4X3HW5JRZ7GCPSR7UHJOLD7AWLTQCDVR/ vendor advisory
https://security.gentoo.org/glsa/202003-26 third party advisory vendor advisory
https://lists.debian.org/debian-lts-announce/2020/07/msg00011.html third party advisory mailing list
https://lists.debian.org/debian-lts-announce/2020/08/msg00034.html third party advisory mailing list
http://packetstormsecurity.com/files/154927/Slackware-Security-Advisory-python-Updates.html third party advisory vdb entry
http://www.openwall.com/lists/oss-security/2021/02/04/2 third party advisory mailing list
https://www.oracle.com/security-alerts/cpujul2022.html third party advisory
https://bugs.python.org/issue36276 vendor advisory issue tracking exploit
https://security.netapp.com/advisory/ntap-20190619-0005/ third party advisory

Frequently Asked Questions

What is the severity of CVE-2019-9740?
CVE-2019-9740 has been scored as a medium severity vulnerability.
How to fix CVE-2019-9740?
To fix CVE-2019-9740, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2019-9740 being actively exploited in the wild?
It is possible that CVE-2019-9740 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~6% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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