import python-urllib3-1.25.10-4.module+el8.5.0+11712+ea2d2be1
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SOURCES/CVE-2021-33503.patch
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61
SOURCES/CVE-2021-33503.patch
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From 2d4a3fee6de2fa45eb82169361918f759269b4ec Mon Sep 17 00:00:00 2001
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From: Seth Michael Larson <sethmichaellarson@gmail.com>
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Date: Wed, 26 May 2021 10:43:12 -0500
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Subject: [PATCH] Improve performance of sub-authority splitting in URL
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---
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src/urllib3/util/url.py | 8 +++++---
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test/test_util.py | 10 ++++++++++
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2 files changed, 15 insertions(+), 3 deletions(-)
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diff --git a/src/urllib3/util/url.py b/src/urllib3/util/url.py
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index 6ff238fe3c..81a03da9e3 100644
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--- a/src/urllib3/util/url.py
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+++ b/src/urllib3/util/url.py
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@@ -63,12 +63,12 @@
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BRACELESS_IPV6_ADDRZ_RE = re.compile("^" + IPV6_ADDRZ_PAT[2:-2] + "$")
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ZONE_ID_RE = re.compile("(" + ZONE_ID_PAT + r")\]$")
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-SUBAUTHORITY_PAT = (u"^(?:(.*)@)?(%s|%s|%s)(?::([0-9]{0,5}))?$") % (
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+_HOST_PORT_PAT = ("^(%s|%s|%s)(?::([0-9]{0,5}))?$") % (
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REG_NAME_PAT,
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IPV4_PAT,
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IPV6_ADDRZ_PAT,
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)
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-SUBAUTHORITY_RE = re.compile(SUBAUTHORITY_PAT, re.UNICODE | re.DOTALL)
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+_HOST_PORT_RE = re.compile(_HOST_PORT_PAT, re.UNICODE | re.DOTALL)
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UNRESERVED_CHARS = set(
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"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789._-~"
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@@ -365,7 +365,9 @@ def parse_url(url):
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scheme = scheme.lower()
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if authority:
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- auth, host, port = SUBAUTHORITY_RE.match(authority).groups()
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+ auth, _, host_port = authority.rpartition("@")
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+ auth = auth or None
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+ host, port = _HOST_PORT_RE.match(host_port).groups()
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if auth and normalize_uri:
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auth = _encode_invalid_chars(auth, USERINFO_CHARS)
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if port == "":
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diff --git a/test/test_util.py b/test/test_util.py
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index a5b68a084b..88409e2d6c 100644
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--- a/test/test_util.py
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+++ b/test/test_util.py
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@@ -438,6 +438,16 @@ def test_netloc(self, url, expected_netloc):
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fragment="hash",
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),
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),
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+ # Tons of '@' causing backtracking
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+ ("https://" + ("@" * 10000) + "[", False),
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+ (
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+ "https://user:" + ("@" * 10000) + "example.com",
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+ Url(
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+ scheme="https",
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+ auth="user:" + ("%40" * 9999),
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+ host="example.com",
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+ ),
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+ ),
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]
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@pytest.mark.parametrize("url, expected_url", url_vulnerabilities)
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@ -6,7 +6,7 @@
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Name: python-%{srcname}
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Version: 1.25.10
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Release: 3%{?dist}
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Release: 4%{?dist}
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Summary: Python HTTP library with thread-safe connection pooling and file post
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License: MIT
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@ -14,6 +14,10 @@ URL: https://github.com/urllib3/urllib3
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Source0: %{url}/archive/%{version}/%{srcname}-%{version}.tar.gz
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# Unbundle ssl_match_hostname since we depend on it
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Source1: ssl_match_hostname_py3.py
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# CVE-2021-33503 Catastrophic backtracking in URL authority parser
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# Tracking bug: https://bugzilla.redhat.com/show_bug.cgi?id=1968074
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# Upstream fix: https://github.com/urllib3/urllib3/commit/2d4a3fee6de2fa45eb82169361918f759269b4ec
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Patch0: CVE-2021-33503.patch
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BuildArch: noarch
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# Exclude i686 arch. Due to a modularity issue it's being added to the
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# x86_64 compose of CRB, but we don't want to ship it at all.
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@ -119,6 +123,10 @@ popd
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%changelog
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* Tue Jun 29 2021 Lumír Balhar <lbalhar@redhat.com> - 1.25.10-4
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- Fix for CVE-2021-33503 Catastrophic backtracking in URL authority parser
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Resolves: rhbz#1968074
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* Wed Jan 13 2021 Tomas Orsava <torsava@redhat.com> - 1.25.10-3
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- Convert from Fedora to the python39 module in RHEL8
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- Resolves: rhbz#1877430
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