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- Add CVE-2020-25657-Bleichenbacher-attack.patch (CVE-2020-25657,

Browse Source 
bsc#1178829), which mitigates the Bleichenbacher timing attacks
  in the RSA decryption API.

OBS-URL: https://build.opensuse.org/package/show/devel:languages:python/python-M2Crypto?expand=0&rev=108
This commit is contained in:
Matej Cepl 2022-07-12 21:24:39 +00:00 committed by Git OBS Bridge
parent d4438ca8be
commit ce064aef99
3 changed files with 83 additions and 0 deletions
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73
CVE-2020-25657-Bleichenbacher-attack.patch Normal file
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@ -0,0 +1,73 @@
---
src/SWIG/_m2crypto_wrap.c | 10 ++++++----
src/SWIG/_rsa.i | 10 ++++++----
tests/test_rsa.py | 2 --
3 files changed, 12 insertions(+), 10 deletions(-)
--- a/src/SWIG/_m2crypto_wrap.c
+++ b/src/SWIG/_m2crypto_wrap.c
@@ -7159,9 +7159,10 @@ PyObject *rsa_public_decrypt(RSA *rsa, P
tlen = RSA_public_decrypt(flen, (unsigned char *)fbuf,
(unsigned char *)tbuf, rsa, padding);
if (tlen == -1) {
- m2_PyErr_Msg(_rsa_err);
+ ERR_clear_error();
+ PyErr_Clear();
PyMem_Free(tbuf);
- return NULL;
+ Py_RETURN_NONE;
}
ret = PyBytes_FromStringAndSize((const char *)tbuf, tlen);
@@ -7213,9 +7214,10 @@ PyObject *rsa_private_decrypt(RSA *rsa,
tlen = RSA_private_decrypt(flen, (unsigned char *)fbuf,
(unsigned char *)tbuf, rsa, padding);
if (tlen == -1) {
- m2_PyErr_Msg(_rsa_err);
+ ERR_clear_error();
+ PyErr_Clear();
PyMem_Free(tbuf);
- return NULL;
+ Py_RETURN_NONE;
}
ret = PyBytes_FromStringAndSize((const char *)tbuf, tlen);
--- a/src/SWIG/_rsa.i
+++ b/src/SWIG/_rsa.i
@@ -269,9 +269,10 @@ PyObject *rsa_public_decrypt(RSA *rsa, P
tlen = RSA_public_decrypt(flen, (unsigned char *)fbuf,
(unsigned char *)tbuf, rsa, padding);
if (tlen == -1) {
- m2_PyErr_Msg(_rsa_err);
+ ERR_clear_error();
+ PyErr_Clear();
PyMem_Free(tbuf);
- return NULL;
+ Py_RETURN_NONE;
}
ret = PyBytes_FromStringAndSize((const char *)tbuf, tlen);
@@ -323,9 +324,10 @@ PyObject *rsa_private_decrypt(RSA *rsa,
tlen = RSA_private_decrypt(flen, (unsigned char *)fbuf,
(unsigned char *)tbuf, rsa, padding);
if (tlen == -1) {
- m2_PyErr_Msg(_rsa_err);
+ ERR_clear_error();
+ PyErr_Clear();
PyMem_Free(tbuf);
- return NULL;
+ Py_RETURN_NONE;
}
ret = PyBytes_FromStringAndSize((const char *)tbuf, tlen);
--- a/tests/test_rsa.py
+++ b/tests/test_rsa.py
@@ -147,8 +147,6 @@ class RSATestCase(unittest.TestCase):
with self.assertRaises(RSA.RSAError):
setattr(rsa, 'e', '\000\000\000\003\001\000\001')
with self.assertRaises(RSA.RSAError):
- rsa.private_encrypt(1)
- with self.assertRaises(RSA.RSAError):
rsa.private_decrypt(1)
assert rsa.check_key()

7
python-M2Crypto.changes
View File

@ -1,3 +1,10 @@
-------------------------------------------------------------------
Tue Jul 12 20:49:47 UTC 2022 - Matej Cepl <mcepl@suse.com>
- Add CVE-2020-25657-Bleichenbacher-attack.patch (CVE-2020-25657,
bsc#1178829), which mitigates the Bleichenbacher timing attacks
in the RSA decryption API.
-------------------------------------------------------------------
Thu Apr 7 15:45:07 UTC 2022 - Matej Cepl <mcepl@suse.com>

3
python-M2Crypto.spec
View File

@ -27,6 +27,9 @@ Group: Development/Languages/Python
URL: https://gitlab.com/m2crypto/m2crypto
Source0: https://files.pythonhosted.org/packages/source/M/M2Crypto/M2Crypto-%{version}.tar.gz
Source1: https://files.pythonhosted.org/packages/source/M/M2Crypto/M2Crypto-%{version}.tar.gz.asc
# PATCH-FIX-UPSTREAM CVE-2020-25657-Bleichenbacher-attack.patch bsc#1178829 mcepl@suse.com
# Mitigate the Bleichenbacher timing attacks in the RSA decryption API
Patch0: CVE-2020-25657-Bleichenbacher-attack.patch
BuildRequires: %{python_module devel}
BuildRequires: %{python_module parameterized}
BuildRequires: %{python_module pytest}