* [bug#46856] [PATCH] gnu: Python 2: Fix CVE-2021-3177.
@ 2021-03-01 19:58 Leo Famulari
2021-03-02 21:58 ` bug#46856: " Leo Famulari
0 siblings, 1 reply; 2+ messages in thread
From: Leo Famulari @ 2021-03-01 19:58 UTC (permalink / raw)
To: 46856
* 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.
---
gnu/local.mk | 1 +
.../patches/python-2.7-CVE-2021-3177.patch | 157 ++++++++++++++++++
gnu/packages/python.scm | 9 +
3 files changed, 167 insertions(+)
create mode 100644 gnu/packages/patches/python-2.7-CVE-2021-3177.patch
diff --git a/gnu/local.mk b/gnu/local.mk
index 0954158d4c..0f8fb20e83 100644
--- a/gnu/local.mk
+++ b/gnu/local.mk
@@ -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 \
diff --git a/gnu/packages/patches/python-2.7-CVE-2021-3177.patch b/gnu/packages/patches/python-2.7-CVE-2021-3177.patch
new file mode 100644
index 0000000000..9f2032ad4a
--- /dev/null
+++ b/gnu/packages/patches/python-2.7-CVE-2021-3177.patch
@@ -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[] = {
diff --git a/gnu/packages/python.scm b/gnu/packages/python.scm
index 9d97050c66..e05c91b3d0 100644
--- a/gnu/packages/python.scm
+++ b/gnu/packages/python.scm
@@ -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)
--
2.30.1
^ permalink raw reply related [flat|nested] 2+ messages in thread
* bug#46856: [PATCH] gnu: Python 2: Fix CVE-2021-3177.
2021-03-01 19:58 [bug#46856] [PATCH] gnu: Python 2: Fix CVE-2021-3177 Leo Famulari
@ 2021-03-02 21:58 ` Leo Famulari
0 siblings, 0 replies; 2+ messages in thread
From: Leo Famulari @ 2021-03-02 21:58 UTC (permalink / raw)
To: 46856-done
Pushed as 3905580180d8f8ed1eec07baa307b4bff0d726d6
^ permalink raw reply [flat|nested] 2+ messages in thread
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2021-03-01 19:58 [bug#46856] [PATCH] gnu: Python 2: Fix CVE-2021-3177 Leo Famulari
2021-03-02 21:58 ` bug#46856: " Leo Famulari
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