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CVE-2024-37891

Status Candidate

Overview

urllib3 is a user-friendly HTTP client library for Python. When using urllib3's proxy support with `ProxyManager`, the `Proxy-Authorization` header is only sent to the configured proxy, as expected. However, when sending HTTP requests *without* using urllib3's proxy support, it's possible to accidentally configure the `Proxy-Authorization` header even though it won't have any effect as the request is not using a forwarding proxy or a tunneling proxy. In those cases, urllib3 doesn't treat the `Proxy-Authorization` HTTP header as one carrying authentication material and thus doesn't strip the header on cross-origin redirects. Because this is a highly unlikely scenario, we believe the severity of this vulnerability is low for almost all users. Out of an abundance of caution urllib3 will automatically strip the `Proxy-Authorization` header during cross-origin redirects to avoid the small chance that users are doing this on accident. Users should use urllib3's proxy support or disable automatic redirects to achieve safe processing of the `Proxy-Authorization` header, but we still decided to strip the header by default in order to further protect users who aren't using the correct approach. We believe the number of usages affected by this advisory is low. It requires all of the following to be true to be exploited: 1. Setting the `Proxy-Authorization` header without using urllib3's built-in proxy support. 2. Not disabling HTTP redirects. 3. Either not using an HTTPS origin server or for the proxy or target origin to redirect to a malicious origin. Users are advised to update to either version 1.26.19 or version 2.2.2. Users unable to upgrade may use the `Proxy-Authorization` header with urllib3's `ProxyManager`, disable HTTP redirects using `redirects=False` when sending requests, or not user the `Proxy-Authorization` header as mitigations.

Related Files

Red Hat Security Advisory 2024-9458-03: Posted Nov 13, 2024; Authored by Red Hat | Site access.redhat.com; Red Hat Security Advisory 2024-9458-03 - An update for python3.11-urllib3 is now available for Red Hat Enterprise Linux 9.; tags | advisory; systems | linux, redhat; advisories | CVE-2024-37891; SHA-256 | 29d5765dc2c14136f8faf789b2d2e4052b8044e4ba834954fa94140795d32ba0; Download | Favorite | View

Red Hat Security Advisory 2024-9457-03: Posted Nov 13, 2024; Authored by Red Hat | Site access.redhat.com; Red Hat Security Advisory 2024-9457-03 - An update for python3.12-urllib3 is now available for Red Hat Enterprise Linux 9. Issues addressed include a remote shell upload vulnerability.; tags | advisory, remote, shell; systems | linux, redhat; advisories | CVE-2024-37891; SHA-256 | 8227c87ea3c4a2d6d25c74d77bc24b194c3a6bf80fbb99081bf8a9064998e024; Download | Favorite | View

Red Hat Security Advisory 2024-8843-03: Posted Nov 5, 2024; Authored by Red Hat | Site access.redhat.com; Red Hat Security Advisory 2024-8843-03 - An update for python3.11-urllib3 is now available for Red Hat Enterprise Linux 8.; tags | advisory; systems | linux, redhat; advisories | CVE-2024-37891; SHA-256 | 2171cdc6fdeff7f0f7dc2a039e82d92ca44ef6ee7b75a8beeda574099e9b0484; Download | Favorite | View

Red Hat Security Advisory 2024-8842-03: Posted Nov 5, 2024; Authored by Red Hat | Site access.redhat.com; Red Hat Security Advisory 2024-8842-03 - An update for python3.12-urllib3 is now available for Red Hat Enterprise Linux 8. Issues addressed include a remote shell upload vulnerability.; tags | advisory, remote, shell; systems | linux, redhat; advisories | CVE-2024-37891; SHA-256 | ae91c8664deb819fc4ddcbf4831200d22f81218eccceadff115c6156faa9ac05; Download | Favorite | View

Ubuntu Security Notice USN-7084-2: Posted Oct 31, 2024; Authored by Ubuntu | Site security.ubuntu.com; Ubuntu Security Notice 7084-2 - USN-7084-1 fixed vulnerability in urllib3. This update provides the corresponding update for the urllib3 module bundled into pip. It was discovered that urllib3 didn't strip HTTP Proxy-Authorization header on cross-origin redirects. A remote attacker could possibly use this issue to obtain sensitive information.; tags | advisory, remote, web; systems | linux, ubuntu; advisories | CVE-2024-37891; SHA-256 | 312ed9f8bb4ab24eb7a502a24a8630b8be43aedef291065858629e605d73ca8d; Download | Favorite | View

Ubuntu Security Notice USN-7084-1: Posted Oct 30, 2024; Authored by Ubuntu | Site security.ubuntu.com; Ubuntu Security Notice 7084-1 - It was discovered that urllib3 didn't strip HTTP Proxy-Authorization header on cross-origin redirects. A remote attacker could possibly use this issue to obtain sensitive information.; tags | advisory, remote, web; systems | linux, ubuntu; advisories | CVE-2024-37891; SHA-256 | 29ff94c3d9e8abedc1bc6ca7386296e337966fbed2dbee657de8625b278ef2ef; Download | Favorite | View

Red Hat Security Advisory 2024-8035-03: Posted Oct 15, 2024; Authored by Red Hat | Site access.redhat.com; Red Hat Security Advisory 2024-8035-03 - An update for python3.11-urllib3 is now available for Red Hat Enterprise Linux 8.8 Extended Update Support.; tags | advisory; systems | linux, redhat; advisories | CVE-2024-37891; SHA-256 | 9cfd56dd61104b853c0fe2fbaefbef1b30ece66e6e21aba07b2f2f0fda3ee5c6; Download | Favorite | View

Red Hat Security Advisory 2024-6358-03: Posted Sep 5, 2024; Authored by Red Hat | Site access.redhat.com; Red Hat Security Advisory 2024-6358-03 - An update for python-urllib3 is now available for Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions.; tags | advisory, python; systems | linux, redhat; advisories | CVE-2024-37891; SHA-256 | 2cb95cae70a744555922e13f2167f7812d638bff19f4fac33a90a8ceb8cc9e3a; Download | Favorite | View

Red Hat Security Advisory 2024-6310-03: Posted Sep 5, 2024; Authored by Red Hat | Site access.redhat.com; Red Hat Security Advisory 2024-6310-03 - An update for resource-agents is now available for Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions, and Red Hat Enterprise Linux 8.6 Telecommunications Update Service.; tags | advisory; systems | linux, redhat; advisories | CVE-2024-37891; SHA-256 | eb13996ca51a1bdba7ec76087c7335af83a344064030028c040f4ced106a10e4; Download | Favorite | View

Red Hat Security Advisory 2024-6240-03: Posted Sep 4, 2024; Authored by Red Hat | Site access.redhat.com; Red Hat Security Advisory 2024-6240-03 - An update for python-urllib3 is now available for Red Hat Enterprise Linux 9.2 Extended Update Support.; tags | advisory, python; systems | linux, redhat; advisories | CVE-2024-37891; SHA-256 | f8ca12fedc9f586716f20cf429a796cdd840be64f85e2b9c6fd565f7f380813f; Download | Favorite | View

Red Hat Security Advisory 2024-6239-03: Posted Sep 4, 2024; Authored by Red Hat | Site access.redhat.com; Red Hat Security Advisory 2024-6239-03 - An update for resource-agents is now available for Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.4 Telecommunications Update Service, and Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions.; tags | advisory; systems | linux, redhat; advisories | CVE-2024-37891; SHA-256 | f87fa3370c9afc7a8d90b96ebeefc5f3433a2965712cd3a50dd5e56911b0ae8f; Download | Favorite | View

Red Hat Security Advisory 2024-6162-03: Posted Sep 3, 2024; Authored by Red Hat | Site access.redhat.com; Red Hat Security Advisory 2024-6162-03 - An update for python-urllib3 is now available for Red Hat Enterprise Linux 9.; tags | advisory, python; systems | linux, redhat; advisories | CVE-2024-37891; SHA-256 | f6321cce0f4160f75f610bd76debfb6a5d8d980acaef8ee9cd4a1af4c88c7f11; Download | Favorite | View

Red Hat Security Advisory 2024-5633-03: Posted Aug 21, 2024; Authored by Red Hat | Site access.redhat.com; Red Hat Security Advisory 2024-5633-03 - An update for fence-agents is now available for Red Hat Enterprise Linux 9.2 Extended Update Support.; tags | advisory; systems | linux, redhat; advisories | CVE-2024-37891; SHA-256 | bc3a8b2b7268cf27e4df7e324e90268990f8da78b1830c0deacc93c01e58792c; Download | Favorite | View

Red Hat Security Advisory 2024-5627-03: Posted Aug 21, 2024; Authored by Red Hat | Site access.redhat.com; Red Hat Security Advisory 2024-5627-03 - An update for fence-agents is now available for Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions.; tags | advisory; systems | linux, redhat; advisories | CVE-2024-37891; SHA-256 | b2112b6827ff68f42e121e2935ab957e4e5d2c9d19d444ed2870dcaf66dac926; Download | Favorite | View

Red Hat Security Advisory 2024-5622-03: Posted Aug 21, 2024; Authored by Red Hat | Site access.redhat.com; Red Hat Security Advisory 2024-5622-03 - An update for fence-agents is now available for Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions, and Red Hat Enterprise Linux 8.6 Telecommunications Update Service.; tags | advisory; systems | linux, redhat; advisories | CVE-2024-37891; SHA-256 | 06bb8e7a7e2c98dcc65357618c56b1cd21fb8624a997816e769373ee7ee8eaeb; Download | Favorite | View

Red Hat Security Advisory 2024-5526-03: Posted Aug 19, 2024; Authored by Red Hat | Site access.redhat.com; Red Hat Security Advisory 2024-5526-03 - An update for python-urllib3 is now available for Red Hat Enterprise Linux 8.8 Extended Update Support.; tags | advisory, python; systems | linux, redhat; advisories | CVE-2024-37891; SHA-256 | 48d2348a69b402487025db81087e780b17e01e1ef07a2704564b0ce099421d8e; Download | Favorite | View

Red Hat Security Advisory 2024-5309-03: Posted Aug 14, 2024; Authored by Red Hat | Site access.redhat.com; Red Hat Security Advisory 2024-5309-03 - An update for python-urllib3 is now available for Red Hat Enterprise Linux 8.; tags | advisory, python; systems | linux, redhat; advisories | CVE-2024-37891; SHA-256 | 26d91382ce3b7ddca583d585d84a25f0d47d55ad1c1f086b5a2e2ce936851e8a; Download | Favorite | View

Red Hat Security Advisory 2024-5041-03: Posted Aug 7, 2024; Authored by Red Hat | Site access.redhat.com; Red Hat Security Advisory 2024-5041-03 - An update for python-urllib3 is now available for Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions, and Red Hat Enterprise Linux 8.6 Telecommunications Update Service.; tags | advisory, python; systems | linux, redhat; advisories | CVE-2024-37891; SHA-256 | 6b4742b3ae16931ed53ddb4c91cfd99be9af0da0c751a994beee8cf3aec61eed; Download | Favorite | View

Red Hat Security Advisory 2024-4746-03: Posted Jul 25, 2024; Authored by Red Hat | Site access.redhat.com; Red Hat Security Advisory 2024-4746-03 - An update for fence-agents is now available for Red Hat Enterprise Linux 8.8 Extended Update Support.; tags | advisory; systems | linux, redhat; advisories | CVE-2024-37891; SHA-256 | 74d108919470ae2b9348f8a2b18c056b6f65cdd28f928bfe1fdb592d81ba42c7; Download | Favorite | View

Red Hat Security Advisory 2024-4744-03: Posted Jul 25, 2024; Authored by Red Hat | Site access.redhat.com; Red Hat Security Advisory 2024-4744-03 - An update for resource-agents is now available for Red Hat Enterprise Linux 8.8 Extended Update Support.; tags | advisory; systems | linux, redhat; advisories | CVE-2024-37891; SHA-256 | b50ce9e73debeb4de387b4744f03766b05a27158a784358057307d3da1034c76; Download | Favorite | View

Red Hat Security Advisory 2024-4730-03: Posted Jul 25, 2024; Authored by Red Hat | Site access.redhat.com; Red Hat Security Advisory 2024-4730-03 - An update for fence-agents is now available for Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions, and Red Hat Enterprise Linux 8.4 Telecommunications Update Service.; tags | advisory; systems | linux, redhat; advisories | CVE-2024-37891; SHA-256 | f1dec41a9017c853bf87eae1c5cf6d8b1a15f7e189b89c1301b8979a70f3ae94; Download | Favorite | View

Red Hat Security Advisory 2024-4422-03: Posted Jul 10, 2024; Authored by Red Hat | Site access.redhat.com; Red Hat Security Advisory 2024-4422-03 - An update for fence-agents is now available for Red Hat Enterprise Linux 9.; tags | advisory; systems | linux, redhat; advisories | CVE-2024-37891; SHA-256 | f527197e460fe91e55b6454c131665c9bb7685c923bfb615a0686e6b89702ba8; Download | Favorite | View

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CVE-2024-37891

Overview

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November 2024

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