Accepting request 1178245 from devel:languages:python
- Update CVE-2024-33664.patch with upstream https://github.com/mpdavis/python-jose/pull/352 bsc#1223422 OBS-URL: https://build.opensuse.org/request/show/1178245 OBS-URL: https://build.opensuse.org/package/show/openSUSE:Factory/python-python-jose?expand=0&rev=9
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Ana Guerrero
Git OBS Bridge
commit
144ef04ebf
@ -1,25 +1,135 @@
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From 483529ee93a3ab510ab579d4d4cc644dba926ade Mon Sep 17 00:00:00 2001
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From: princekhunt <info@princekhunt.com>
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Date: Wed, 20 Mar 2024 22:12:36 +0530
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Subject: [PATCH] limit token size to 250 KB
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From ff3357d9f91b93bc957aac9bc5a447c5c0bb74da Mon Sep 17 00:00:00 2001
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From: "alistair.watts@groupbc.com" <alistair.watts@groupbc.com>
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Date: Tue, 7 May 2024 14:50:53 +0100
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Subject: [PATCH] Fix for CVE-2024-33664. JWE limited to 250K
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---
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jose/jwe.py | 5 +++++
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1 file changed, 5 insertions(+)
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jose/constants.py | 2 ++
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jose/jwe.py | 24 ++++++++++++++++++------
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tests/test_jwe.py | 34 +++++++++++++++++++++++++++++++++-
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3 files changed, 53 insertions(+), 7 deletions(-)
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diff --git a/jose/constants.py b/jose/constants.py
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index ab4d74d3..58787d46 100644
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--- a/jose/constants.py
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+++ b/jose/constants.py
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@@ -96,3 +96,5 @@ class Zips:
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ZIPS = Zips()
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+
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+JWE_SIZE_LIMIT = 250 * 1024
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diff --git a/jose/jwe.py b/jose/jwe.py
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index 2c387ff4..1e0833e7 100644
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index 2c387ff4..04923873 100644
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--- a/jose/jwe.py
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+++ b/jose/jwe.py
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@@ -76,6 +76,11 @@ def decrypt(jwe_str, key):
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@@ -6,7 +6,7 @@
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from . import jwk
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from .backends import get_random_bytes
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-from .constants import ALGORITHMS, ZIPS
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+from .constants import ALGORITHMS, ZIPS, JWE_SIZE_LIMIT
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from .exceptions import JWEError, JWEParseError
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from .utils import base64url_decode, base64url_encode, ensure_binary
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@@ -76,6 +76,13 @@ def decrypt(jwe_str, key):
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>>> jwe.decrypt(jwe_string, 'asecret128bitkey')
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'Hello, World!'
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"""
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+
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+ # limit the token size to 250 KB
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+ if len(jwe_str) > 250 * 1024:
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+ raise JWEError("JWE string exceeds 250 KB")
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+
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+
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+ # Limit the token size - if the data is compressed then decompressing the
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+ # data could lead to large memory usage. This helps address This addresses
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+ # CVE-2024-33664. Also see _decompress()
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+ if len(jwe_str) > JWE_SIZE_LIMIT:
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+ raise JWEError("JWE string exceeds {JWE_SIZE_LIMIT} bytes")
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+
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header, encoded_header, encrypted_key, iv, cipher_text, auth_tag = _jwe_compact_deserialize(jwe_str)
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# Verify that the implementation understands and can process all
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@@ -424,13 +431,13 @@ def _compress(zip, plaintext):
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(bytes): Compressed plaintext
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"""
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if zip not in ZIPS.SUPPORTED:
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- raise NotImplementedError("ZIP {} is not supported!")
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+ raise NotImplementedError(f"ZIP {zip} is not supported!")
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if zip is None:
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compressed = plaintext
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elif zip == ZIPS.DEF:
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compressed = zlib.compress(plaintext)
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else:
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- raise NotImplementedError("ZIP {} is not implemented!")
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+ raise NotImplementedError(f"ZIP {zip} is not implemented!")
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return compressed
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@@ -446,13 +453,18 @@ def _decompress(zip, compressed):
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(bytes): Compressed plaintext
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"""
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if zip not in ZIPS.SUPPORTED:
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- raise NotImplementedError("ZIP {} is not supported!")
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+ raise NotImplementedError(f"ZIP {zip} is not supported!")
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if zip is None:
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decompressed = compressed
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elif zip == ZIPS.DEF:
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- decompressed = zlib.decompress(compressed)
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+ # If, during decompression, there is more data than expected, the
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+ # decompression halts and raise an error. This addresses CVE-2024-33664
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+ decompressor = zlib.decompressobj()
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+ decompressed = decompressor.decompress(compressed, max_length=JWE_SIZE_LIMIT)
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+ if decompressor.unconsumed_tail:
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+ raise JWEError(f"Decompressed JWE string exceeds {JWE_SIZE_LIMIT} bytes")
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else:
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- raise NotImplementedError("ZIP {} is not implemented!")
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+ raise NotImplementedError(f"ZIP {zip} is not implemented!")
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return decompressed
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diff --git a/tests/test_jwe.py b/tests/test_jwe.py
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index f089d565..8c5ff387 100644
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--- a/tests/test_jwe.py
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+++ b/tests/test_jwe.py
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@@ -5,7 +5,7 @@
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import jose.backends
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from jose import jwe
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from jose.constants import ALGORITHMS, ZIPS
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-from jose.exceptions import JWEParseError
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+from jose.exceptions import JWEParseError, JWEError
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from jose.jwk import AESKey, RSAKey
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from jose.utils import base64url_decode
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@@ -525,3 +525,35 @@ def test_kid_header_not_present_when_not_provided(self):
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encrypted = jwe.encrypt("Text", PUBLIC_KEY_PEM, enc, alg)
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header = json.loads(base64url_decode(encrypted.split(b".")[0]))
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assert "kid" not in header
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+
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+ @pytest.mark.skipif(AESKey is None, reason="No AES backend")
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+ def test_jwe_with_excessive_data(self):
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+ enc = ALGORITHMS.A256CBC_HS512
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+ alg = ALGORITHMS.RSA_OAEP_256
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+ import jose.constants
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+ old_limit = jose.constants.JWE_SIZE_LIMIT
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+ try:
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+ jose.constants.JWE_SIZE_LIMIT = 1024
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+ encrypted = jwe.encrypt(b"Text"*64*1024, PUBLIC_KEY_PEM, enc, alg)
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+ header = json.loads(base64url_decode(encrypted.split(b".")[0]))
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+ with pytest.raises(JWEError):
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+ actual = jwe.decrypt(encrypted, PRIVATE_KEY_PEM)
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+ finally:
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+ jose.constants.JWE_SIZE_LIMIT = old_limit
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+
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+ @pytest.mark.skipif(AESKey is None, reason="No AES backend")
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+ def test_jwe_zip_with_excessive_data(self):
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+ # Test that a fix for CVE-2024-33664 is in place.
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+ enc = ALGORITHMS.A256CBC_HS512
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+ alg = ALGORITHMS.RSA_OAEP_256
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+ import jose.constants
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+ old_limit = jose.constants.JWE_SIZE_LIMIT
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+ try:
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+ jose.constants.JWE_SIZE_LIMIT = 1024
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+ encrypted = jwe.encrypt(b"Text"*64*1024, PUBLIC_KEY_PEM, enc, alg, zip=ZIPS.DEF)
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+ assert len(encrypted) < jose.constants.JWE_SIZE_LIMIT
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+ header = json.loads(base64url_decode(encrypted.split(b".")[0]))
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+ with pytest.raises(JWEError):
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+ actual = jwe.decrypt(encrypted, PRIVATE_KEY_PEM)
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+ finally:
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+ jose.constants.JWE_SIZE_LIMIT = old_limit
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@ -1,3 +1,10 @@
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-------------------------------------------------------------------
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Mon Jun 3 07:38:00 UTC 2024 - Daniel Garcia <daniel.garcia@suse.com>
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- Update CVE-2024-33664.patch with upstream
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https://github.com/mpdavis/python-jose/pull/352
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bsc#1223422
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-------------------------------------------------------------------
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Tue May 7 09:58:08 UTC 2024 - Daniel Garcia <daniel.garcia@suse.com>
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@ -36,8 +36,6 @@
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%bcond_with testnative
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%endif
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%{?!python_module:%define python_module() python3-%{**}}
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%define skip_python2 1
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%{?sle15_python_module_pythons}
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Name: python-python-jose%{psuffix}
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Version: 3.3.0
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@ -47,7 +45,7 @@ License: MIT
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URL: https://github.com/mpdavis/python-jose
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Source: https://files.pythonhosted.org/packages/source/p/python-jose/python-jose-%{version}.tar.gz
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Patch0: unpin-deps.patch
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# PATCH-FIX-UPSTREAM CVE-2024-33664.patch gh#mpdavis/python-jose#345
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# PATCH-FIX-UPSTREAM CVE-2024-33664.patch gh#mpdavis/python-jose#352
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Patch1: CVE-2024-33664.patch
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# PATCH-FIX-UPSTREAM CVE-2024-33663.patch gh#mpdavis/python-jose#349
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Patch2: CVE-2024-33663.patch
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