CVE-2018-20852 (GCVE-0-2018-20852)
Vulnerability from cvelistv5
Published
2019-07-13 20:29
Modified
2026-10-07 18:24
Severity ?
4.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
CWE
  • n/a
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
https://bugs.python.org/issue35121 x_refsource_MISC
https://python-security.readthedocs.io/vuln/cookie-domain-check.html x_refsource_MISC
https://lists.debian.org/debian-lts-announce/2019/08/msg00022.html mailing-list, x_refsource_MLIST
http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00071.html vendor-advisory, x_refsource_SUSE
http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00074.html vendor-advisory, x_refsource_SUSE
https://lists.debian.org/debian-lts-announce/2019/08/msg00040.html mailing-list, x_refsource_MLIST
https://usn.ubuntu.com/4127-2/ vendor-advisory, x_refsource_UBUNTU
https://usn.ubuntu.com/4127-1/ vendor-advisory, x_refsource_UBUNTU
https://access.redhat.com/errata/RHSA-2019:3725 vendor-advisory, x_refsource_REDHAT
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/K7HNVIFMETMFWWWUNTB72KYJYXCZOS5V/ vendor-advisory, x_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZBTGPBUABGXZ7WH7677OEM3NSP6ZEA76/ vendor-advisory, x_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/COATURTCY7G67AYI6UDV5B2JZTBCKIDX/ vendor-advisory, x_refsource_FEDORA
https://access.redhat.com/errata/RHSA-2019:3948 vendor-advisory, x_refsource_REDHAT
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00040.html vendor-advisory, x_refsource_SUSE
https://security.gentoo.org/glsa/202003-26 vendor-advisory, x_refsource_GENTOO
https://www.oracle.com/security-alerts/cpuapr2020.html x_refsource_MISC
https://lists.debian.org/debian-lts-announce/2020/07/msg00011.html mailing-list, x_refsource_MLIST
https://lists.debian.org/debian-lts-announce/2020/08/msg00034.html mailing-list, x_refsource_MLIST
Impacted products
Vendor Product Version
n/a n/a Version: n/a
Show details on NVD website

To clipboard 

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}


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