CVE-2019-9948: Path Traversal
First published: Sat Mar 23 2019(Updated: )
urllib in Python 2.x through 2.7.16 supports the local_file: scheme, which makes it easier for remote attackers to bypass protection mechanisms that blacklist file: URIs, as demonstrated by triggering a urllib.urlopen('local_file:///etc/passwd') call.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/python | <0:2.7.5-86.el7 | 0:2.7.5-86.el7 |
| redhat/python | <0:2.7.5-63.el7_4 | 0:2.7.5-63.el7_4 |
| redhat/python | <0:2.7.5-74.el7_5 | 0:2.7.5-74.el7_5 |
| redhat/python | <0:2.7.5-83.el7_6 | 0:2.7.5-83.el7_6 |
| redhat/python3 | <0:3.6.8-15.1.el8 | 0:3.6.8-15.1.el8 |
| redhat/python27-python | <0:2.7.16-6.el6 | 0:2.7.16-6.el6 |
| redhat/rh-python36-python | <0:3.6.9-2.el6 | 0:3.6.9-2.el6 |
| redhat/python27-python | <0:2.7.16-6.el7 | 0:2.7.16-6.el7 |
| redhat/rh-python36-python | <0:3.6.9-2.el7 | 0:3.6.9-2.el7 |
| Python Python | >=2.0<2.7.17 | |
| Python Python | >=3.5.0<3.5.8 | |
| Python Python | >=3.6.0<3.6.9 | |
| Python Python | >=3.7.0<3.7.4 | |
| openSUSE Leap | =15.0 | |
| openSUSE Leap | =42.3 | |
| Debian Debian Linux | =8.0 | |
| Debian Debian Linux | =9.0 | |
| Fedoraproject Fedora | =29 | |
| Fedoraproject Fedora | =30 | |
| Canonical Ubuntu Linux | =12.04 | |
| Canonical Ubuntu Linux | =14.04 | |
| Canonical Ubuntu Linux | =16.04 | |
| Canonical Ubuntu Linux | =18.04 | |
| Canonical Ubuntu Linux | =19.04 | |
| Redhat Enterprise Linux Desktop | =7.0 | |
| Redhat Enterprise Linux Desktop | =8.0 | |
| Redhat Enterprise Linux Eus | =8.1 | |
| Redhat Enterprise Linux Eus | =8.2 | |
| Redhat Enterprise Linux Eus | =8.4 | |
| Redhat Enterprise Linux Eus | =8.6 | |
| Redhat Enterprise Linux Server | =7.0 | |
| Redhat Enterprise Linux Server | =8.0 | |
| Redhat Enterprise Linux Server Eus | =8.4 | |
| Redhat Enterprise Linux Tus | =8.2 | |
| Redhat Enterprise Linux Tus | =8.4 | |
| Redhat Enterprise Linux Tus | =8.6 | |
| Redhat Enterprise Linux Workstation | =7.0 | |
| Redhat Enterprise Linux Workstation | =8.0 | |
| ubuntu/python3.5 | <3.5.2-2ubuntu0~16.04.8 | 3.5.2-2ubuntu0~16.04.8 |
| ubuntu/python3.6 | <3.6.8-1~18.04.2 | 3.6.8-1~18.04.2 |
| ubuntu/python2.7 | <2.7.15-4ubuntu4~18.04.1 | 2.7.15-4ubuntu4~18.04.1 |
| ubuntu/python2.7 | <2.7.16-2~18.10 | 2.7.16-2~18.10 |
| ubuntu/python2.7 | <2.7.6-8ubuntu0.6+ | 2.7.6-8ubuntu0.6+ |
| ubuntu/python2.7 | <2.7.16-2 | 2.7.16-2 |
| ubuntu/python2.7 | <2.7.12-1ubuntu0~16.04.8 | 2.7.12-1ubuntu0~16.04.8 |
| ubuntu/python3.7 | <3.7.3-2ubuntu0.1 | 3.7.3-2ubuntu0.1 |
| ubuntu/python3.4 | <3.4.3-1ubuntu1~14.04.7+ | 3.4.3-1ubuntu1~14.04.7+ |
| debian/python2.7 | 2.7.16-2+deb10u1 2.7.16-2+deb10u4 2.7.18-8+deb11u1 | |
| debian/python3.7 | 3.7.3-2+deb10u3 3.7.3-2+deb10u7 |
Remedy
If your application uses a blacklist to prevent "file://" schema from being used, consider using a whitelist approach to just allow the schemas you want or add "local_file://" schema to your blacklist.
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Reference Links
- https://www.cve.org/CVERecord?id=CVE-2019-9948 https://nvd.nist.gov/vuln/detail/CVE-2019-9948
- https://bugzilla.redhat.com/show_bug.cgi?id=1695570
- https://access.redhat.com/errata/RHBA-2020:0547
- https://access.redhat.com/errata/RHSA-2019:2030
- https://access.redhat.com/errata/RHSA-2020:1346
- https://access.redhat.com/errata/RHSA-2020:1268
- https://access.redhat.com/errata/RHSA-2020:1462
- https://access.redhat.com/errata/RHSA-2019:3335
- https://access.redhat.com/errata/RHSA-2019:3520
- https://access.redhat.com/errata/RHSA-2019:1700
- https://access.redhat.com/errata/RHSA-2019:3725
- https://access.redhat.com/security/cve/cve-2019-9948
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00092.html
- http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00050.html
- http://packetstormsecurity.com/files/154927/Slackware-Security-Advisory-python-Updates.html
- http://www.securityfocus.com/bid/107549
- https://bugs.python.org/issue35907
- https://github.com/python/cpython/pull/11842
- https://lists.apache.org/thread.html/r1b103833cb5bc8466e24ff0ecc5e75b45a705334ab6a444e64e840a0@%3Cissues.bookkeeper.apache.org%3E
- https://lists.debian.org/debian-lts-announce/2019/06/msg00022.html
- https://lists.debian.org/debian-lts-announce/2019/07/msg00011.html
- https://lists.debian.org/debian-lts-announce/2020/07/msg00011.html
- https://lists.debian.org/debian-lts-announce/2020/08/msg00034.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/HQEQLXLOCR3SNM3AA5RRYJFQ5AZBYJ4L/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/KRYFIMISZ47NTAU3XWZUOFB7CYL62KES/
- https://seclists.org/bugtraq/2019/Oct/29
- https://security.gentoo.org/glsa/202003-26
- https://security.netapp.com/advisory/ntap-20190404-0004/
- https://usn.ubuntu.com/4127-1/
- https://usn.ubuntu.com/4127-2/
- https://launchpad.net/bugs/cve/CVE-2019-9948
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1695599
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1695600
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1698976
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1698977
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1698978
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1698979
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1698980
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1698981
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1698982
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1700688
- https://lists.apache.org/thread.html/r1b103833cb5bc8466e24ff0ecc5e75b45a705334ab6a444e64e840a0%40%3Cissues.bookkeeper.apache.org%3E
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HQEQLXLOCR3SNM3AA5RRYJFQ5AZBYJ4L/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KRYFIMISZ47NTAU3XWZUOFB7CYL62KES/
- https://github.com/python/cpython/commit/34bab215596671d0dec2066ae7d7450cd73f638b
- https://github.com/python/cpython/commit/4f06dae5d8d4400ba38d8502da620f07d4a5696e
- https://github.com/python/cpython/commit/b15bde8058e821b383d81fcae68b335a752083ca
- https://github.com/python/cpython/commit/942c31dffbe886ff02e25a319cc3891220b8c641
- https://security-tracker.debian.org/tracker/CVE-2019-9948
- https://ubuntu.com/security/notices/USN-4127-1
- https://ubuntu.com/security/notices/USN-4127-2
- https://www.cve.org/CVERecord?id=CVE-2019-9948
- https://nvd.nist.gov/vuln/detail/CVE-2019-9948
- https://ubuntu.com/security/CVE-2019-9948
Parent vulnerabilities
(Appears in the following advisories)
Frequently Asked Questions
What is CVE-2019-9948?
CVE-2019-9948 is a vulnerability in urllib in Python 2.x through 2.7.16 that allows remote attackers to bypass protection mechanisms.
How severe is CVE-2019-9948?
CVE-2019-9948 has a severity rating of 9.1, which is considered critical.
Which software versions are affected by CVE-2019-9948?
Python 2.x through 2.7.16 is affected by CVE-2019-9948.
How can I fix CVE-2019-9948?
Upgrade to a version of Python that is not affected, such as Python 3.0 or later.
Where can I find more information about CVE-2019-9948?
You can find more information about CVE-2019-9948 in the references provided: https://bugs.python.org/issue35907, https://github.com/python/cpython/pull/11842, https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1695599
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