CVE-2018-20852
Vulnerability from cvelistv5
Published
2019-07-13 20:29
Modified
2024-08-05 12:12
Severity ?
Summary
http.cookiejar.DefaultPolicy.domain_return_ok in Lib/http/cookiejar.py in Python before 3.7.3 does not correctly validate the domain: it can be tricked into sending existing cookies to the wrong server. An attacker may abuse this flaw by using a server with a hostname that has another valid hostname as a suffix (e.g., pythonicexample.com to steal cookies for example.com). When a program uses http.cookiejar.DefaultPolicy and tries to do an HTTP connection to an attacker-controlled server, existing cookies can be leaked to the attacker. This affects 2.x through 2.7.16, 3.x before 3.4.10, 3.5.x before 3.5.7, 3.6.x before 3.6.9, and 3.7.x before 3.7.3.
References
cve@mitre.orghttp://lists.opensuse.org/opensuse-security-announce/2019-08/msg00071.html
cve@mitre.orghttp://lists.opensuse.org/opensuse-security-announce/2019-08/msg00074.html
cve@mitre.orghttp://lists.opensuse.org/opensuse-security-announce/2020-01/msg00040.html
cve@mitre.orghttps://access.redhat.com/errata/RHSA-2019:3725
cve@mitre.orghttps://access.redhat.com/errata/RHSA-2019:3948
cve@mitre.orghttps://bugs.python.org/issue35121Exploit, Issue Tracking, Vendor Advisory
cve@mitre.orghttps://lists.debian.org/debian-lts-announce/2019/08/msg00022.html
cve@mitre.orghttps://lists.debian.org/debian-lts-announce/2019/08/msg00040.html
cve@mitre.orghttps://lists.debian.org/debian-lts-announce/2020/07/msg00011.html
cve@mitre.orghttps://lists.debian.org/debian-lts-announce/2020/08/msg00034.html
cve@mitre.orghttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/COATURTCY7G67AYI6UDV5B2JZTBCKIDX/
cve@mitre.orghttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/K7HNVIFMETMFWWWUNTB72KYJYXCZOS5V/
cve@mitre.orghttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZBTGPBUABGXZ7WH7677OEM3NSP6ZEA76/
cve@mitre.orghttps://python-security.readthedocs.io/vuln/cookie-domain-check.htmlVendor Advisory
cve@mitre.orghttps://security.gentoo.org/glsa/202003-26
cve@mitre.orghttps://usn.ubuntu.com/4127-1/
cve@mitre.orghttps://usn.ubuntu.com/4127-2/
cve@mitre.orghttps://www.oracle.com/security-alerts/cpuapr2020.html
af854a3a-2127-422b-91ae-364da2661108http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00071.html
af854a3a-2127-422b-91ae-364da2661108http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00074.html
af854a3a-2127-422b-91ae-364da2661108http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00040.html
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/errata/RHSA-2019:3725
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/errata/RHSA-2019:3948
af854a3a-2127-422b-91ae-364da2661108https://bugs.python.org/issue35121Exploit, Issue Tracking, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2019/08/msg00022.html
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2019/08/msg00040.html
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2020/07/msg00011.html
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2020/08/msg00034.html
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/COATURTCY7G67AYI6UDV5B2JZTBCKIDX/
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/K7HNVIFMETMFWWWUNTB72KYJYXCZOS5V/
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZBTGPBUABGXZ7WH7677OEM3NSP6ZEA76/
af854a3a-2127-422b-91ae-364da2661108https://python-security.readthedocs.io/vuln/cookie-domain-check.htmlVendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://security.gentoo.org/glsa/202003-26
af854a3a-2127-422b-91ae-364da2661108https://usn.ubuntu.com/4127-1/
af854a3a-2127-422b-91ae-364da2661108https://usn.ubuntu.com/4127-2/
af854a3a-2127-422b-91ae-364da2661108https://www.oracle.com/security-alerts/cpuapr2020.html
Impacted products
Vendor Product Version
Show details on NVD website

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    "nvd": "{\"cve\":{\"id\":\"CVE-2018-20852\",\"sourceIdentifier\":\"cve@mitre.org\",\"published\":\"2019-07-13T21:15:10.377\",\"lastModified\":\"2024-11-21T04:02:18.780\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"http.cookiejar.DefaultPolicy.domain_return_ok in Lib/http/cookiejar.py in Python before 3.7.3 does not correctly validate the domain: it can be tricked into sending existing cookies to the wrong server. An attacker may abuse this flaw by using a server with a hostname that has another valid hostname as a suffix (e.g., pythonicexample.com to steal cookies for example.com). When a program uses http.cookiejar.DefaultPolicy and tries to do an HTTP connection to an attacker-controlled server, existing cookies can be leaked to the attacker. This affects 2.x through 2.7.16, 3.x before 3.4.10, 3.5.x before 3.5.7, 3.6.x before 3.6.9, and 3.7.x before 3.7.3.\"},{\"lang\":\"es\",\"value\":\"http.cookiejar.DefaultPolicy.domain_return_ok en Lib / http / cookiejar.py en Python en versiones anteriores a la 3.7.3 no valida correctamente el dominio: se puede enga\u00f1ar para que env\u00ede las cookies existentes al servidor incorrecto. Un atacante puede abusar de este fallo al usar un servidor con un nombre de host que tiene otro nombre de host v\u00e1lido como sufijo (por ejemplo, pythonicexample.com para robar cookies para example.com). Cuando un programa utiliza http.cookiejar.DefaultPolicy e intenta hacer una conexi\u00f3n HTTP a un servidor controlado por un atacante, las cookies existentes pueden ser filtradas al atacante. Esto afecta a la versi\u00f3n 2.x hasta la versi\u00f3n 2.7.16, versi\u00f3n 3.x en versiones anteriores a la 3.4.10, versi\u00f3n 3.5.x en versiones anteriores a la 3.5.7, versi\u00f3n 3.6.x en versiones anteriores a la 3.6.9 y versi\u00f3n 3.7.x en versiones anteriores a la 3.7.3.\"}],\"metrics\":{\"cvssMetricV30\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.0\",\"vectorString\":\"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N\",\"baseScore\":5.3,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"LOW\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":3.9,\"impactScore\":1.4}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:N/AC:L/Au:N/C:P/I:N/A:N\",\"baseScore\":5.0,\"accessVector\":\"NETWORK\",\"accessComplexity\":\"LOW\",\"authentication\":\"NONE\",\"confidentialityImpact\":\"PARTIAL\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"NONE\"},\"baseSeverity\":\"MEDIUM\",\"exploitabilityScore\":10.0,\"impactScore\":2.9,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-20\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:python:python:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"2.0\",\"versionEndIncluding\":\"2.7.16\",\"matchCriteriaId\":\"573B27AF-F9CA-4DA8-89B2-6AD6D61CDFDE\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:python:python:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"3.0.0\",\"versionEndExcluding\":\"3.4.10\",\"matchCriteriaId\":\"C1E55AC4-366D-497C-A541-A7BA86084846\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:python:python:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"3.5.0\",\"versionEndExcluding\":\"3.5.7\",\"matchCriteriaId\":\"BA03C7E0-BBBD-48B7-8B55-D21114F7AE78\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:python:python:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"3.6.0\",\"versionEndExcluding\":\"3.6.9\",\"matchCriteriaId\":\"2C052B2D-757B-4342-8BE9-510A08599779\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:python:python:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"3.7.0\",\"versionEndExcluding\":\"3.7.3\",\"matchCriteriaId\":\"4C910F83-E507-4572-93B0-740BFBA89B7A\"}]}]}],\"references\":[{\"url\":\"http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00071.html\",\"source\":\"cve@mitre.org\"},{\"url\":\"http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00074.html\",\"source\":\"cve@mitre.org\"},{\"url\":\"http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00040.html\",\"source\":\"cve@mitre.org\"},{\"url\":\"https://access.redhat.com/errata/RHSA-2019:3725\",\"source\":\"cve@mitre.org\"},{\"url\":\"https://access.redhat.com/errata/RHSA-2019:3948\",\"source\":\"cve@mitre.org\"},{\"url\":\"https://bugs.python.org/issue35121\",\"source\":\"cve@mitre.org\",\"tags\":[\"Exploit\",\"Issue 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  }
}


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  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
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