CVE-2019-9948

python: Undocumented local_file protocol allows remote attackers to bypass protection mechanisms

Severity Score

9.1

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

urllib en Python, en versiones 2.x hasta la 2.7.16, soporta el esquema local_file:, lo que facilita que los atacantes remotos omitan los mecanismos de protección que ponen en lista negra los URI file:, tal y como queda demostrado con una llamada urllib.urlopen('local_file:///etc/passwd').

It was discovered that Python incorrectly handled certain pickle files. An attacker could possibly use this issue to consume memory, leading to a denial of service. This issue only affected Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. It was discovered that Python incorrectly validated the domain when handling cookies. An attacker could possibly trick Python into sending cookies to the wrong domain. Various other issues were also addressed.

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2019-03-23 CVE Reserved
2019-03-23 CVE Published
2024-08-04 CVE Updated
2024-08-04 First Exploit
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CWE-749: Exposed Dangerous Method or Function

CAPEC

References (24)

URL	Tag	Source
http://packetstormsecurity.com/files/154927/Slackware-Security-Advisory-python-Updates.html	Third Party Advisory
http://www.securityfocus.com/bid/107549	Third Party Advisory
https://lists.apache.org/thread.html/r1b103833cb5bc8466e24ff0ecc5e75b45a705334ab6a444e64e840a0%40%3Cissues.bookkeeper.apache.org%3E	Mailing List
https://lists.debian.org/debian-lts-announce/2019/06/msg00022.html	Mailing List
https://lists.debian.org/debian-lts-announce/2019/07/msg00011.html	Mailing List
https://lists.debian.org/debian-lts-announce/2020/07/msg00011.html	Mailing List
https://lists.debian.org/debian-lts-announce/2020/08/msg00034.html	Mailing List
https://seclists.org/bugtraq/2019/Oct/29	Mailing List
https://security.netapp.com/advisory/ntap-20190404-0004	Third Party Advisory

URL	Date	SRC
https://bugs.python.org/issue35907	2024-08-04

URL	Date	SRC
https://github.com/python/cpython/pull/11842	2023-11-07

URL	Date	SRC
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00092.html	2023-11-07
http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00050.html	2023-11-07
https://access.redhat.com/errata/RHSA-2019:1700	2023-11-07
https://access.redhat.com/errata/RHSA-2019:2030	2023-11-07
https://access.redhat.com/errata/RHSA-2019:3335	2023-11-07
https://access.redhat.com/errata/RHSA-2019:3520	2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HQEQLXLOCR3SNM3AA5RRYJFQ5AZBYJ4L	2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KRYFIMISZ47NTAU3XWZUOFB7CYL62KES	2023-11-07
https://security.gentoo.org/glsa/202003-26	2023-11-07
https://usn.ubuntu.com/4127-1	2023-11-07
https://usn.ubuntu.com/4127-2	2023-11-07
https://access.redhat.com/security/cve/CVE-2019-9948	2020-04-14
https://bugzilla.redhat.com/show_bug.cgi?id=1695570	2020-04-14

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				>= 2.0 < 2.7.17 Search vendor "Python" for product "Python" and version " >= 2.0 < 2.7.17"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				>= 3.5.0 < 3.5.8 Search vendor "Python" for product "Python" and version " >= 3.5.0 < 3.5.8"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				>= 3.6.0 < 3.6.9 Search vendor "Python" for product "Python" and version " >= 3.6.0 < 3.6.9"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				>= 3.7.0 < 3.7.4 Search vendor "Python" for product "Python" and version " >= 3.7.0 < 3.7.4"		-		Affected
Opensuse Search vendor "Opensuse"		Leap Search vendor "Opensuse" for product "Leap"				15.0 Search vendor "Opensuse" for product "Leap" and version "15.0"		-		Affected
Opensuse Search vendor "Opensuse"		Leap Search vendor "Opensuse" for product "Leap"				42.3 Search vendor "Opensuse" for product "Leap" and version "42.3"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				8.0 Search vendor "Debian" for product "Debian Linux" and version "8.0"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				9.0 Search vendor "Debian" for product "Debian Linux" and version "9.0"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				29 Search vendor "Fedoraproject" for product "Fedora" and version "29"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				30 Search vendor "Fedoraproject" for product "Fedora" and version "30"		-		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				12.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "12.04"		-		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				14.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "14.04"		esm		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				16.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "16.04"		esm		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				18.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "18.04"		lts		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				19.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "19.04"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Desktop Search vendor "Redhat" for product "Enterprise Linux Desktop"				7.0 Search vendor "Redhat" for product "Enterprise Linux Desktop" and version "7.0"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Desktop Search vendor "Redhat" for product "Enterprise Linux Desktop"				8.0 Search vendor "Redhat" for product "Enterprise Linux Desktop" and version "8.0"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Eus Search vendor "Redhat" for product "Enterprise Linux Eus"				8.1 Search vendor "Redhat" for product "Enterprise Linux Eus" and version "8.1"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Eus Search vendor "Redhat" for product "Enterprise Linux Eus"				8.2 Search vendor "Redhat" for product "Enterprise Linux Eus" and version "8.2"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Eus Search vendor "Redhat" for product "Enterprise Linux Eus"				8.4 Search vendor "Redhat" for product "Enterprise Linux Eus" and version "8.4"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Eus Search vendor "Redhat" for product "Enterprise Linux Eus"				8.6 Search vendor "Redhat" for product "Enterprise Linux Eus" and version "8.6"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Server Search vendor "Redhat" for product "Enterprise Linux Server"				7.0 Search vendor "Redhat" for product "Enterprise Linux Server" and version "7.0"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Server Search vendor "Redhat" for product "Enterprise Linux Server"				8.0 Search vendor "Redhat" for product "Enterprise Linux Server" and version "8.0"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Server Eus Search vendor "Redhat" for product "Enterprise Linux Server Eus"				8.4 Search vendor "Redhat" for product "Enterprise Linux Server Eus" and version "8.4"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Tus Search vendor "Redhat" for product "Enterprise Linux Tus"				8.2 Search vendor "Redhat" for product "Enterprise Linux Tus" and version "8.2"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Tus Search vendor "Redhat" for product "Enterprise Linux Tus"				8.4 Search vendor "Redhat" for product "Enterprise Linux Tus" and version "8.4"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Tus Search vendor "Redhat" for product "Enterprise Linux Tus"				8.6 Search vendor "Redhat" for product "Enterprise Linux Tus" and version "8.6"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Workstation Search vendor "Redhat" for product "Enterprise Linux Workstation"				7.0 Search vendor "Redhat" for product "Enterprise Linux Workstation" and version "7.0"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Workstation Search vendor "Redhat" for product "Enterprise Linux Workstation"				8.0 Search vendor "Redhat" for product "Enterprise Linux Workstation" and version "8.0"		-		Affected