CVE-2011-1521

urllib2): Improper management of ftp:// and file:// URL schemes (Issue #11662)

Severity Score

6.4

*CVSS v2

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

The urllib and urllib2 modules in Python 2.x before 2.7.2 and 3.x before 3.2.1 process Location headers that specify redirection to file: URLs, which makes it easier for remote attackers to obtain sensitive information or cause a denial of service (resource consumption) via a crafted URL, as demonstrated by the file:///etc/passwd and file:///dev/zero URLs.

Los módulos urllib y urllib2 en Python v2.x anteriores a v2.7.2 y v3.x anteriores a v3.2.1 procesan los encabezados de ubicación que especificar la redirección del fichero: URLs, lo que hace que sea más fácil para los atacantes remotos obtener información sensible o provocar una denegación de servicio (consumo de recursos) a través de una URL manipulada, como lo demuestra lso ficheros URLs: //etc/passwd y //dev/zero.

*Credits: N/A

CVSS Scores

NISTv2 6.4

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2011-03-28 CVE Reserved
2011-05-22 CVE Published
2023-06-12 EPSS Updated
2024-08-06 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-399: Resource Management Errors

CAPEC

References (27)

URL	Tag	Source
http://hg.python.org/cpython/file/96a6c128822b/Misc/NEWS	X_refsource_confirm
http://hg.python.org/cpython/file/b2934d98dac1/Misc/NEWS	X_refsource_confirm
http://openwall.com/lists/oss-security/2011/03/24/5	Mailing List
http://openwall.com/lists/oss-security/2011/03/28/2	Mailing List
http://openwall.com/lists/oss-security/2011/09/11/1	Mailing List
http://openwall.com/lists/oss-security/2011/09/13/2	Mailing List
http://openwall.com/lists/oss-security/2011/09/15/5	Mailing List
http://secunia.com/advisories/50858	Third Party Advisory
http://secunia.com/advisories/51024	Third Party Advisory
http://secunia.com/advisories/51040	Third Party Advisory
http://securitytracker.com/id?1025488	Vdb Entry
http://support.apple.com/kb/HT5002	X_refsource_confirm
https://bugzilla.redhat.com/show_bug.cgi?id=737366	X_refsource_confirm
https://www.djangoproject.com/weblog/2011/sep/09	X_refsource_confirm
https://www.djangoproject.com/weblog/2011/sep/10/127	X_refsource_confirm

URL	Date	SRC

URL	Date	SRC
http://bugs.python.org/issue11662	2019-10-25
http://hg.python.org/cpython/rev/96a6c128822b	2019-10-25
http://hg.python.org/cpython/rev/b2934d98dac1	2019-10-25
https://bugzilla.redhat.com/show_bug.cgi?id=690560	2011-05-19

URL	Date	SRC
http://lists.apple.com/archives/Security-announce/2011//Oct/msg00003.html	2019-10-25
http://lists.opensuse.org/opensuse-security-announce/2011-05/msg00005.html	2019-10-25
http://www.mandriva.com/security/advisories?name=MDVSA-2011:096	2019-10-25
http://www.ubuntu.com/usn/USN-1592-1	2019-10-25
http://www.ubuntu.com/usn/USN-1596-1	2019-10-25
http://www.ubuntu.com/usn/USN-1613-1	2019-10-25
http://www.ubuntu.com/usn/USN-1613-2	2019-10-25
https://access.redhat.com/security/cve/CVE-2011-1521	2011-05-19

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 Search vendor "Python" for product "Python" and version "2.0"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				2.0.1 Search vendor "Python" for product "Python" and version "2.0.1"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				2.1 Search vendor "Python" for product "Python" and version "2.1"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				2.1.1 Search vendor "Python" for product "Python" and version "2.1.1"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				2.1.2 Search vendor "Python" for product "Python" and version "2.1.2"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				2.1.3 Search vendor "Python" for product "Python" and version "2.1.3"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				2.2 Search vendor "Python" for product "Python" and version "2.2"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				2.2.1 Search vendor "Python" for product "Python" and version "2.2.1"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				2.2.2 Search vendor "Python" for product "Python" and version "2.2.2"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				2.2.3 Search vendor "Python" for product "Python" and version "2.2.3"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				2.3.1 Search vendor "Python" for product "Python" and version "2.3.1"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				2.3.2 Search vendor "Python" for product "Python" and version "2.3.2"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				2.3.3 Search vendor "Python" for product "Python" and version "2.3.3"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				2.3.4 Search vendor "Python" for product "Python" and version "2.3.4"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				2.3.5 Search vendor "Python" for product "Python" and version "2.3.5"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				2.3.7 Search vendor "Python" for product "Python" and version "2.3.7"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				2.4.1 Search vendor "Python" for product "Python" and version "2.4.1"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				2.4.2 Search vendor "Python" for product "Python" and version "2.4.2"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				2.4.3 Search vendor "Python" for product "Python" and version "2.4.3"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				2.4.4 Search vendor "Python" for product "Python" and version "2.4.4"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				2.4.6 Search vendor "Python" for product "Python" and version "2.4.6"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				2.5.1 Search vendor "Python" for product "Python" and version "2.5.1"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				2.5.2 Search vendor "Python" for product "Python" and version "2.5.2"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				2.5.3 Search vendor "Python" for product "Python" and version "2.5.3"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				2.5.4 Search vendor "Python" for product "Python" and version "2.5.4"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				2.6.1 Search vendor "Python" for product "Python" and version "2.6.1"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				2.6.4 Search vendor "Python" for product "Python" and version "2.6.4"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				2.6.5 Search vendor "Python" for product "Python" and version "2.6.5"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				2.6.6 Search vendor "Python" for product "Python" and version "2.6.6"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				2.6.7 Search vendor "Python" for product "Python" and version "2.6.7"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				2.7.1 Search vendor "Python" for product "Python" and version "2.7.1"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				3.0 Search vendor "Python" for product "Python" and version "3.0"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				3.0.1 Search vendor "Python" for product "Python" and version "3.0.1"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				3.1 Search vendor "Python" for product "Python" and version "3.1"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				3.1.1 Search vendor "Python" for product "Python" and version "3.1.1"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				3.1.2 Search vendor "Python" for product "Python" and version "3.1.2"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				3.1.3 Search vendor "Python" for product "Python" and version "3.1.3"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				3.2 Search vendor "Python" for product "Python" and version "3.2"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				3.2 Search vendor "Python" for product "Python" and version "3.2"		alpha		Affected