Vulnerability Monitor

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CVE-2011-4137

The verify_exists functionality in the URLField implementation in Django before 1.2.7 and 1.3.x before 1.3.1 relies on Python libraries that attempt access to an arbitrary URL with no timeout, which allows remote attackers to cause a denial of service (resource consumption) via a URL associated with (1) a slow response, (2) a completed TCP connection with no application data sent, or (3) a large amount of application data, a related issue to CVE-2011-1521.

Security Impact Summary

CVE-2011-4137 is a security vulnerability that . Impacting 1 product from djangoproject organizations running these solutions should prioritize assessment and patching.

Historical Context

Documented in 2011, this vulnerability occurred amid the cloud computing expansion era, where traditional network perimeter security models were being reevaluated. Organizations were transitioning from isolated infrastructure to interconnected systems, creating new attack surfaces that vulnerabilities like this could exploit.

Published

2011-10-19T10:55:04.207

Last Modified

2025-04-11T00:51:21.963

Status

Deferred

Source

[email protected]

Severity

CVSSv2: 5.0 (MEDIUM)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:N/I:N/A:P

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: NONE
Availability Impact: PARTIAL

Exploitability Score

10.0

Impact Score

2.9

Weaknesses

Type: Primary
CWE-399

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	djangoproject	django	≤ 1.2.6	Yes
Application	djangoproject	django	0.91	Yes
Application	djangoproject	django	0.95	Yes
Application	djangoproject	django	0.95.1	Yes
Application	djangoproject	django	0.96	Yes
Application	djangoproject	django	1.0	Yes
Application	djangoproject	django	1.0.1	Yes
Application	djangoproject	django	1.0.2	Yes
Application	djangoproject	django	1.1	Yes
Application	djangoproject	django	1.1.0	Yes
Application	djangoproject	django	1.1.2	Yes
Application	djangoproject	django	1.1.3	Yes
Application	djangoproject	django	1.2	Yes
Application	djangoproject	django	1.2.1	Yes
Application	djangoproject	django	1.2.1	Yes
Application	djangoproject	django	1.2.2	Yes
Application	djangoproject	django	1.2.3	Yes
Application	djangoproject	django	1.2.4	Yes
Application	djangoproject	django	1.2.5	Yes
Application	djangoproject	django	1.3	Yes
Application	djangoproject	django	1.3	Yes
Application	djangoproject	django	1.3	Yes

References

http://openwall.com/lists/oss-security/2011/09/11/1 Patch ([email protected])
http://openwall.com/lists/oss-security/2011/09/13/2 Patch ([email protected])
http://openwall.com/lists/oss-security/2011/09/15/5 ([email protected])
http://secunia.com/advisories/46614 ([email protected])
http://www.debian.org/security/2011/dsa-2332 ([email protected])
https://bugzilla.redhat.com/show_bug.cgi?id=737366 Patch ([email protected])
https://hermes.opensuse.org/messages/14700881 ([email protected])
https://www.djangoproject.com/weblog/2011/sep/09/ Patch, Vendor Advisory ([email protected])
https://www.djangoproject.com/weblog/2011/sep/10/127/ Patch ([email protected])
http://openwall.com/lists/oss-security/2011/09/11/1 Patch (af854a3a-2127-422b-91ae-364da2661108)
http://openwall.com/lists/oss-security/2011/09/13/2 Patch (af854a3a-2127-422b-91ae-364da2661108)
http://openwall.com/lists/oss-security/2011/09/15/5 (af854a3a-2127-422b-91ae-364da2661108)
http://secunia.com/advisories/46614 (af854a3a-2127-422b-91ae-364da2661108)
http://www.debian.org/security/2011/dsa-2332 (af854a3a-2127-422b-91ae-364da2661108)
https://bugzilla.redhat.com/show_bug.cgi?id=737366 Patch (af854a3a-2127-422b-91ae-364da2661108)
https://hermes.opensuse.org/messages/14700881 (af854a3a-2127-422b-91ae-364da2661108)
https://www.djangoproject.com/weblog/2011/sep/09/ Patch, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.djangoproject.com/weblog/2011/sep/10/127/ Patch (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For djangoproject's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.