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gnu: Python 2: Fix CVE-2021-3177. 

* gnu/packages/patches/python-2.7-CVE-2021-3177.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.
* gnu/packages/python.scm (python-2.7)[replacement]: New field.
(python-2.7/fixed): New variable.
master
Leo Famulari 2021-03-01 13:35:19 -05:00
parent c48c69194f
commit 3905580180
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GPG Key ID: 2646FA30BACA7F08
3 changed files with 167 additions and 0 deletions
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1
gnu/local.mk
View File

@ -1518,6 +1518,7 @@ dist_patch_DATA = \
%D%/packages/patches/python-2.7-search-paths.patch \
%D%/packages/patches/python-2.7-site-prefixes.patch \
%D%/packages/patches/python-2.7-source-date-epoch.patch \
%D%/packages/patches/python-2.7-CVE-2021-3177.patch \
%D%/packages/patches/python-3-arm-alignment.patch \
%D%/packages/patches/python-3-deterministic-build-info.patch \
%D%/packages/patches/python-3-search-paths.patch \

157
gnu/packages/patches/python-2.7-CVE-2021-3177.patch 100644
View File

@ -0,0 +1,157 @@
Fix CVE-2021-3177 for Python 2.7:
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3177
Patch copied from Debian:
https://salsa.debian.org/cpython-team/python2/-/blob/e54f3303884f1362f3311ec36f070b40603dd76e/debian/patches/CVE-2021-3177.diff
bpo-42938: Replace snprintf with Python unicode formatting in ctypes param reprs.
--- a/Lib/ctypes/test/test_parameters.py
+++ b/Lib/ctypes/test/test_parameters.py
@@ -206,6 +206,49 @@ class SimpleTypesTestCase(unittest.TestC
with self.assertRaises(ZeroDivisionError):
WorseStruct().__setstate__({}, b'foo')
+ def test_parameter_repr(self):
+ from ctypes import (
+ c_bool,
+ c_char,
+ c_wchar,
+ c_byte,
+ c_ubyte,
+ c_short,
+ c_ushort,
+ c_int,
+ c_uint,
+ c_long,
+ c_ulong,
+ c_longlong,
+ c_ulonglong,
+ c_float,
+ c_double,
+ c_longdouble,
+ c_char_p,
+ c_wchar_p,
+ c_void_p,
+ )
+ self.assertRegexpMatches(repr(c_bool.from_param(True)), r"^<cparam '\?' at 0x[A-Fa-f0-9]+>$")
+ self.assertEqual(repr(c_char.from_param('a')), "<cparam 'c' (a)>")
+ self.assertRegexpMatches(repr(c_wchar.from_param('a')), r"^<cparam 'u' at 0x[A-Fa-f0-9]+>$")
+ self.assertEqual(repr(c_byte.from_param(98)), "<cparam 'b' (98)>")
+ self.assertEqual(repr(c_ubyte.from_param(98)), "<cparam 'B' (98)>")
+ self.assertEqual(repr(c_short.from_param(511)), "<cparam 'h' (511)>")
+ self.assertEqual(repr(c_ushort.from_param(511)), "<cparam 'H' (511)>")
+ self.assertRegexpMatches(repr(c_int.from_param(20000)), r"^<cparam '[li]' \(20000\)>$")
+ self.assertRegexpMatches(repr(c_uint.from_param(20000)), r"^<cparam '[LI]' \(20000\)>$")
+ self.assertRegexpMatches(repr(c_long.from_param(20000)), r"^<cparam '[li]' \(20000\)>$")
+ self.assertRegexpMatches(repr(c_ulong.from_param(20000)), r"^<cparam '[LI]' \(20000\)>$")
+ self.assertRegexpMatches(repr(c_longlong.from_param(20000)), r"^<cparam '[liq]' \(20000\)>$")
+ self.assertRegexpMatches(repr(c_ulonglong.from_param(20000)), r"^<cparam '[LIQ]' \(20000\)>$")
+ self.assertEqual(repr(c_float.from_param(1.5)), "<cparam 'f' (1.5)>")
+ self.assertEqual(repr(c_double.from_param(1.5)), "<cparam 'd' (1.5)>")
+ self.assertEqual(repr(c_double.from_param(1e300)), "<cparam 'd' (1e+300)>")
+ self.assertRegexpMatches(repr(c_longdouble.from_param(1.5)), r"^<cparam ('d' \(1.5\)|'g' at 0x[A-Fa-f0-9]+)>$")
+ self.assertRegexpMatches(repr(c_char_p.from_param(b'hihi')), "^<cparam 'z' \(0x[A-Fa-f0-9]+\)>$")
+ self.assertRegexpMatches(repr(c_wchar_p.from_param('hihi')), "^<cparam 'Z' \(0x[A-Fa-f0-9]+\)>$")
+ self.assertRegexpMatches(repr(c_void_p.from_param(0x12)), r"^<cparam 'P' \(0x0*12\)>$")
+
################################################################
if __name__ == '__main__':
--- a/Modules/_ctypes/callproc.c
+++ b/Modules/_ctypes/callproc.c
@@ -460,50 +460,53 @@ PyCArg_dealloc(PyCArgObject *self)
static PyObject *
PyCArg_repr(PyCArgObject *self)
{
- char buffer[256];
switch(self->tag) {
case 'b':
case 'B':
- sprintf(buffer, "<cparam '%c' (%d)>",
+ return PyString_FromFormat("<cparam '%c' (%d)>",
self->tag, self->value.b);
- break;
case 'h':
case 'H':
- sprintf(buffer, "<cparam '%c' (%d)>",
+ return PyString_FromFormat("<cparam '%c' (%d)>",
self->tag, self->value.h);
- break;
case 'i':
case 'I':
- sprintf(buffer, "<cparam '%c' (%d)>",
+ return PyString_FromFormat("<cparam '%c' (%d)>",
self->tag, self->value.i);
- break;
case 'l':
case 'L':
- sprintf(buffer, "<cparam '%c' (%ld)>",
+ return PyString_FromFormat("<cparam '%c' (%ld)>",
self->tag, self->value.l);
- break;
#ifdef HAVE_LONG_LONG
case 'q':
case 'Q':
- sprintf(buffer,
- "<cparam '%c' (%" PY_FORMAT_LONG_LONG "d)>",
+ return PyString_FromFormat("<cparam '%c' (%" PY_FORMAT_LONG_LONG "d)>",
self->tag, self->value.q);
- break;
#endif
case 'd':
- sprintf(buffer, "<cparam '%c' (%f)>",
- self->tag, self->value.d);
- break;
- case 'f':
- sprintf(buffer, "<cparam '%c' (%f)>",
- self->tag, self->value.f);
- break;
+ case 'f': {
+ PyObject *f = PyFloat_FromDouble((self->tag == 'f') ? self->value.f : self->value.d);
+ if (f == NULL) {
+ return NULL;
+ }
+ PyObject *r = PyObject_Repr(f);
+ Py_DECREF(f);
+ if (r == NULL) {
+ return NULL;
+ }
+ char *value = PyString_AsString(r);
+ if (value == NULL) {
+ return NULL;
+ }
+ PyObject *result = PyString_FromFormat("<cparam '%c' (%s)>", self->tag, value);
+ Py_DECREF(r);
+ return result;
+ }
case 'c':
- sprintf(buffer, "<cparam '%c' (%c)>",
+ return PyString_FromFormat("<cparam '%c' (%c)>",
self->tag, self->value.c);
- break;
/* Hm, are these 'z' and 'Z' codes useful at all?
Shouldn't they be replaced by the functionality of c_string
@@ -512,16 +515,13 @@ PyCArg_repr(PyCArgObject *self)
case 'z':
case 'Z':
case 'P':
- sprintf(buffer, "<cparam '%c' (%p)>",
+ return PyString_FromFormat("<cparam '%c' (%p)>",
self->tag, self->value.p);
- break;
default:
- sprintf(buffer, "<cparam '%c' at %p>",
+ return PyString_FromFormat("<cparam '%c' at %p>",
self->tag, self);
- break;
}
- return PyString_FromString(buffer);
}
static PyMemberDef PyCArgType_members[] = {

9
gnu/packages/python.scm
View File

@ -107,6 +107,7 @@
(define-public python-2.7
(package
(name "python2")
(replacement python-2.7/fixed)
(version "2.7.17")
(source
(origin
@ -350,6 +351,14 @@ data types.")
(properties '((cpe-name . "python")))
(license license:psfl)))
(define python-2.7/fixed
(package
(inherit python-2.7)
(source (origin
(inherit (package-source python-2.7))
(patches (append (search-patches "python-2.7-CVE-2021-3177.patch")
(origin-patches (package-source python-2.7))))))))
;; Current 2.x version.
(define-public python-2 python-2.7)