CVE-2011-1521

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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."}, {"lang": "es", "value": "Los m\u00f3dulos urllib y urllib2 en Python v2.x anteriores a v2.7.2 y v3.x anteriores a v3.2.1 procesan los encabezados de ubicaci\u00f3n que especificar la redirecci\u00f3n del fichero: URLs, lo que hace que sea m\u00e1s f\u00e1cil para los atacantes remotos obtener informaci\u00f3n sensible o provocar una denegaci\u00f3n de servicio (consumo de recursos) a trav\u00e9s de una URL manipulada, como lo demuestra lso ficheros URLs: //etc/passwd y //dev/zero."}], "id": "CVE-2011-1521", "lastModified": "2026-06-16T23:29:32.600", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", 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{"affected_release": [{"advisory": "RHSA-2011:0491", "cpe": "cpe:/o:redhat:enterprise_linux:4", "package": "python-0:2.3.4-14.10.el4", "product_name": "Red Hat Enterprise Linux 4", "release_date": "2011-05-05T00:00:00Z"}, {"advisory": "RHSA-2011:0492", "cpe": "cpe:/o:redhat:enterprise_linux:5", "package": "python-0:2.4.3-44.el5", "product_name": "Red Hat Enterprise Linux 5", "release_date": "2011-05-05T00:00:00Z"}, {"advisory": "RHSA-2011:0554", "cpe": "cpe:/o:redhat:enterprise_linux:6", "package": "python-0:2.6.6-20.el6", "product_name": "Red Hat Enterprise Linux 6", "release_date": "2011-05-19T00:00:00Z"}, {"advisory": "RHSA-2011:0554", "cpe": "cpe:/o:redhat:enterprise_linux:6", "package": "python-docs-0:2.6.6-2.el6", "product_name": "Red Hat Enterprise Linux 6", "release_date": "2011-05-19T00:00:00Z"}], "bugzilla": {"description": "urllib2): Improper management of ftp:// and file:// URL schemes (Issue #11662)", "id": "690560", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=690560"}, "csaw": false, "cvss": {"cvss_base_score": "6.4", "cvss_scoring_vector": "AV:N/AC:L/Au:N/C:P/I:N/A:P", "status": "verified"}, "details": ["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."], "name": "CVE-2011-1521", "public_date": "2011-03-24T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2011-1521\nhttps://nvd.nist.gov/vuln/detail/CVE-2011-1521"], "threat_severity": "Moderate"}

{}