- Add CVE-2021-3177-buf_ovrfl_PyCArg_repr.patch fixing
bsc#1181126 (CVE-2021-3177) buffer overflow in PyCArg_repr in _ctypes/callproc.c, which may lead to remote code execution. OBS-URL: https://build.opensuse.org/package/show/devel:languages:python:Factory/python?expand=0&rev=292
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CVE-2021-3177-buf_ovrfl_PyCArg_repr.patch
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172
CVE-2021-3177-buf_ovrfl_PyCArg_repr.patch
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From 34df10a9a16b38d54421eeeaf73ec89828563be7 Mon Sep 17 00:00:00 2001
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From: Benjamin Peterson <benjamin@python.org>
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Date: Mon, 18 Jan 2021 15:11:46 -0600
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Subject: [PATCH] [3.6] closes bpo-42938: Replace snprintf with Python unicode
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formatting in ctypes param reprs. (GH-24250)
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(cherry picked from commit 916610ef90a0d0761f08747f7b0905541f0977c7)
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Co-authored-by: Benjamin Peterson <benjamin@python.org>
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---
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Lib/ctypes/test/test_parameters.py | 43 +++++++++++++++
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.../2021-01-18-09-27-31.bpo-42938.4Zn4Mp.rst | 2 +
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Modules/_ctypes/callproc.c | 55 +++++++------------
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3 files changed, 66 insertions(+), 34 deletions(-)
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create mode 100644 Misc/NEWS.d/next/Security/2021-01-18-09-27-31.bpo-42938.4Zn4Mp.rst
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--- a/Lib/ctypes/test/test_parameters.py
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+++ b/Lib/ctypes/test/test_parameters.py
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@@ -1,4 +1,6 @@
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-import unittest, sys
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+import platform
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+import sys
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+import unittest
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from ctypes.test import need_symbol
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import test.support
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@@ -206,6 +208,50 @@ class SimpleTypesTestCase(unittest.TestC
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with self.assertRaises(ZeroDivisionError):
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WorseStruct().__setstate__({}, b'foo')
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+ def test_parameter_repr(self):
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+ from ctypes import (
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+ c_bool,
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+ c_char,
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+ c_wchar,
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+ c_byte,
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+ c_ubyte,
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+ c_short,
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+ c_ushort,
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+ c_int,
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+ c_uint,
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+ c_long,
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+ c_ulong,
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+ c_longlong,
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+ c_ulonglong,
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+ c_float,
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+ c_double,
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+ c_longdouble,
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+ c_char_p,
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+ c_wchar_p,
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+ c_void_p,
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+ )
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+ self.assertRegexpMatches(repr(c_bool.from_param(True)), r"^<cparam '\?' at 0x[A-Fa-f0-9]+>$")
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+ self.assertEqual(repr(c_char.from_param('a')), "<cparam 'c' ('a')>")
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+ self.assertRegexpMatches(repr(c_wchar.from_param('a')), r"^<cparam 'u' at 0x[A-Fa-f0-9]+>$")
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+ self.assertEqual(repr(c_byte.from_param(98)), "<cparam 'b' (98)>")
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+ self.assertEqual(repr(c_ubyte.from_param(98)), "<cparam 'B' (98)>")
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+ self.assertEqual(repr(c_short.from_param(511)), "<cparam 'h' (511)>")
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+ self.assertEqual(repr(c_ushort.from_param(511)), "<cparam 'H' (511)>")
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+ self.assertRegexpMatches(repr(c_int.from_param(20000)), r"^<cparam '[li]' \(20000\)>$")
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+ self.assertRegexpMatches(repr(c_uint.from_param(20000)), r"^<cparam '[LI]' \(20000\)>$")
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+ self.assertRegexpMatches(repr(c_long.from_param(20000)), r"^<cparam '[li]' \(20000\)>$")
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+ self.assertRegexpMatches(repr(c_ulong.from_param(20000)), r"^<cparam '[LI]' \(20000\)>$")
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+ if platform.architecture()[0].startswith("64"):
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+ self.assertRegexpMatches(repr(c_longlong.from_param(20000)), r"^<cparam '[liq]' \(20000\)>$")
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+ self.assertRegexpMatches(repr(c_ulonglong.from_param(20000)), r"^<cparam '[LIQ]' \(20000\)>$")
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+ self.assertEqual(repr(c_float.from_param(1.5)), "<cparam 'f' (1.5)>")
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+ self.assertEqual(repr(c_double.from_param(1.5)), "<cparam 'd' (1.5)>")
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+ self.assertEqual(repr(c_double.from_param(1e300)), "<cparam 'd' (1e+300)>")
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+ self.assertRegexpMatches(repr(c_longdouble.from_param(1.5)), r"^<cparam ('d' \(1.5\)|'g' at 0x[A-Fa-f0-9]+)>$")
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+ self.assertRegexpMatches(repr(c_char_p.from_param(b'hihi')), "^<cparam 'z' \(0x[A-Fa-f0-9]+\)>$")
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+ self.assertRegexpMatches(repr(c_wchar_p.from_param('hihi')), "^<cparam 'Z' \(0x[A-Fa-f0-9]+\)>$")
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+ self.assertRegexpMatches(repr(c_void_p.from_param(0x12)), r"^<cparam 'P' \(0x0*12\)>$")
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+
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################################################################
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if __name__ == '__main__':
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--- /dev/null
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+++ b/Misc/NEWS.d/next/Security/2021-01-18-09-27-31.bpo-42938.4Zn4Mp.rst
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@@ -0,0 +1,2 @@
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+Avoid static buffers when computing the repr of :class:`ctypes.c_double` and
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+:class:`ctypes.c_longdouble` values.
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--- a/Modules/_ctypes/callproc.c
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+++ b/Modules/_ctypes/callproc.c
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@@ -460,50 +460,44 @@ PyCArg_dealloc(PyCArgObject *self)
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static PyObject *
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PyCArg_repr(PyCArgObject *self)
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{
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- char buffer[256];
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switch(self->tag) {
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case 'b':
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case 'B':
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- sprintf(buffer, "<cparam '%c' (%d)>",
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+ return PyUnicode_FromFormat("<cparam '%c' (%d)>",
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self->tag, self->value.b);
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- break;
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case 'h':
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case 'H':
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- sprintf(buffer, "<cparam '%c' (%d)>",
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+ return PyUnicode_FromFormat("<cparam '%c' (%d)>",
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self->tag, self->value.h);
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- break;
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case 'i':
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case 'I':
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- sprintf(buffer, "<cparam '%c' (%d)>",
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+ return PyUnicode_FromFormat("<cparam '%c' (%d)>",
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self->tag, self->value.i);
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- break;
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case 'l':
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case 'L':
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- sprintf(buffer, "<cparam '%c' (%ld)>",
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+ return PyUnicode_FromFormat("<cparam '%c' (%ld)>",
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self->tag, self->value.l);
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- break;
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-#ifdef HAVE_LONG_LONG
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+#if defined(HAVE_LONG_LONG) && defined(LLONG_MAX)
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case 'q':
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case 'Q':
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- sprintf(buffer,
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- "<cparam '%c' (%" PY_FORMAT_LONG_LONG "d)>",
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+ return PyUnicode_FromFormat("<cparam '%c' (%lld)>",
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self->tag, self->value.q);
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- break;
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#endif
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case 'd':
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- sprintf(buffer, "<cparam '%c' (%f)>",
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- self->tag, self->value.d);
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- break;
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- case 'f':
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- sprintf(buffer, "<cparam '%c' (%f)>",
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- self->tag, self->value.f);
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- break;
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+ case 'f': {
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+ PyObject *f = PyFloat_FromDouble((self->tag == 'f') ? self->value.f : self->value.d);
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+ if (f == NULL) {
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+ return NULL;
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+ }
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+ PyObject *result = PyUnicode_FromFormat("<cparam '%c' (%R)>", self->tag, f);
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+ Py_DECREF(f);
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+ return result;
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+ }
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case 'c':
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- sprintf(buffer, "<cparam '%c' (%c)>",
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- self->tag, self->value.c);
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- break;
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+ return PyUnicode_FromFormat("<cparam '%c' ('%c')>",
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+ self->tag, self->value.c);
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/* Hm, are these 'z' and 'Z' codes useful at all?
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Shouldn't they be replaced by the functionality of c_string
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@@ -512,16 +506,13 @@ PyCArg_repr(PyCArgObject *self)
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case 'z':
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case 'Z':
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case 'P':
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- sprintf(buffer, "<cparam '%c' (%p)>",
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+ return PyUnicode_FromFormat("<cparam '%c' (%p)>",
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self->tag, self->value.p);
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- break;
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default:
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- sprintf(buffer, "<cparam '%c' at %p>",
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- self->tag, self);
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- break;
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+ return PyUnicode_FromFormat("<cparam '%c' at %p>",
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+ (unsigned char)self->tag, (void *)self);
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}
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- return PyString_FromString(buffer);
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}
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static PyMemberDef PyCArgType_members[] = {
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@ -1,3 +1,10 @@
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-------------------------------------------------------------------
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Mon Jan 25 23:35:49 UTC 2021 - Matej Cepl <mcepl@suse.com>
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- Add CVE-2021-3177-buf_ovrfl_PyCArg_repr.patch fixing
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bsc#1181126 (CVE-2021-3177) buffer overflow in PyCArg_repr in
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_ctypes/callproc.c, which may lead to remote code execution.
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-------------------------------------------------------------------
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Tue Jan 5 09:15:36 UTC 2021 - Matej Cepl <mcepl@suse.com>
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@ -97,6 +97,9 @@ Patch59: CVE-2019-9674-zip-bomb.patch
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# PATCH-FIX-UPSTREAM configure_PYTHON_FOR_REGEN.patch bsc#1078326 mcepl@suse.com
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# PYTHON_FOR_REGEN value is set very weird upstream
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Patch60: configure_PYTHON_FOR_REGEN.patch
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# PATCH-FIX-SLE CVE-2021-3177-buf_ovrfl_PyCArg_repr.patch bsc#1181126 mcepl@suse.com
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# buffer overflow in PyCArg_repr in _ctypes/callproc.c, which may lead to remote code execution
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Patch61: CVE-2021-3177-buf_ovrfl_PyCArg_repr.patch
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# COMMON-PATCH-END
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%define python_version %(echo %{tarversion} | head -c 3)
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BuildRequires: automake
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@ -222,6 +225,7 @@ other applications.
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%patch58 -p1
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%patch59 -p1
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%patch60 -p1
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%patch61 -p1
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# drop Autoconf version requirement
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sed -i 's/^version_required/dnl version_required/' configure.ac
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@ -1,3 +1,10 @@
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-------------------------------------------------------------------
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Mon Jan 25 23:35:49 UTC 2021 - Matej Cepl <mcepl@suse.com>
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- Add CVE-2021-3177-buf_ovrfl_PyCArg_repr.patch fixing
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bsc#1181126 (CVE-2021-3177) buffer overflow in PyCArg_repr in
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_ctypes/callproc.c, which may lead to remote code execution.
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-------------------------------------------------------------------
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Tue Jan 5 09:15:36 UTC 2021 - Matej Cepl <mcepl@suse.com>
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@ -99,6 +99,9 @@ Patch59: CVE-2019-9674-zip-bomb.patch
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# PATCH-FIX-UPSTREAM configure_PYTHON_FOR_REGEN.patch bsc#1078326 mcepl@suse.com
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# PYTHON_FOR_REGEN value is set very weird upstream
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Patch60: configure_PYTHON_FOR_REGEN.patch
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# PATCH-FIX-SLE CVE-2021-3177-buf_ovrfl_PyCArg_repr.patch bsc#1181126 mcepl@suse.com
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# buffer overflow in PyCArg_repr in _ctypes/callproc.c, which may lead to remote code execution
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Patch61: CVE-2021-3177-buf_ovrfl_PyCArg_repr.patch
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# COMMON-PATCH-END
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Provides: pyth_doc
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Provides: pyth_ps
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@ -166,6 +169,7 @@ Python, and Macintosh Module Reference in PDF format.
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%patch58 -p1
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%patch59 -p1
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%patch60 -p1
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%patch61 -p1
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# drop Autoconf version requirement
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sed -i 's/^version_required/dnl version_required/' configure.ac
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@ -194,7 +198,7 @@ mv $PDOCS/docs-pdf $PDOCS/paper-a4
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tar xfj %{SOURCE3} -C $PDOCS
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mv $PDOCS/docs-pdf $PDOCS/paper-letter
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# this is part of main package
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#install -c -m 644 README $PDOCS/README
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#install -c -m 644 README $PDOCS/README
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for i in Misc/* ; do
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[ -f $i ] && install -c -m 644 $i $PDOCS/Misc/
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done
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@ -1,3 +1,10 @@
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-------------------------------------------------------------------
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Mon Jan 25 23:35:49 UTC 2021 - Matej Cepl <mcepl@suse.com>
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- Add CVE-2021-3177-buf_ovrfl_PyCArg_repr.patch fixing
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bsc#1181126 (CVE-2021-3177) buffer overflow in PyCArg_repr in
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_ctypes/callproc.c, which may lead to remote code execution.
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-------------------------------------------------------------------
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Tue Jan 5 09:15:36 UTC 2021 - Matej Cepl <mcepl@suse.com>
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@ -99,6 +99,9 @@ Patch59: CVE-2019-9674-zip-bomb.patch
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# PATCH-FIX-UPSTREAM configure_PYTHON_FOR_REGEN.patch bsc#1078326 mcepl@suse.com
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# PYTHON_FOR_REGEN value is set very weird upstream
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Patch60: configure_PYTHON_FOR_REGEN.patch
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# PATCH-FIX-SLE CVE-2021-3177-buf_ovrfl_PyCArg_repr.patch bsc#1181126 mcepl@suse.com
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# buffer overflow in PyCArg_repr in _ctypes/callproc.c, which may lead to remote code execution
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Patch61: CVE-2021-3177-buf_ovrfl_PyCArg_repr.patch
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# COMMON-PATCH-END
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BuildRequires: automake
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BuildRequires: db-devel
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@ -280,6 +283,7 @@ that rely on earlier non-verification behavior.
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%patch58 -p1
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%patch59 -p1
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%patch60 -p1
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%patch61 -p1
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# drop Autoconf version requirement
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sed -i 's/^version_required/dnl version_required/' configure.ac
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