fix two security issues, using patches from upstream:

-stricter redirect handling in urllib, to prevent redirects to eg
 "file://" URLs (CVE-2011-1521)
-stricter argument checks in the audioop module (CVE-2010-2089)

3 files changed, 398 insertions, 0 deletions

diff --git a/lang/python25/patches/patch-ba b/lang/python25/patches/patch-ba
new file mode 100644
index 00000000000..018ac9983c1
--- /dev/null
+++ b/lang/python25/patches/patch-ba
@@ -0,0 +1,29 @@
+$NetBSD: patch-ba,v 1.3 2011/03/28 15:58:15 drochner Exp $
+
+Issue #11662 (CVE-2011-1521)
+
+--- Lib/urllib.py.orig	2007-03-14 08:27:57.000000000 +0000
++++ Lib/urllib.py
+@@ -638,10 +638,20 @@ class FancyURLopener(URLopener):
+             newurl = headers['uri']
+         else:
+             return
+-        void = fp.read()
+-        fp.close()
++
+         # In case the server sent a relative URL, join with original:
+         newurl = basejoin(self.type + ":" + url, newurl)
++
++        # For security reasons we do not allow redirects to protocols
++        # other than HTTP, HTTPS or FTP.
++        newurl_lower = newurl.lower()
++        if not (newurl_lower.startswith('http://') or
++                newurl_lower.startswith('https://') or
++		newurl_lower.startswith('ftp://')):
++            return
++
++        void = fp.read()
++        fp.close()
+         return self.open(newurl)
+ 
+     def http_error_301(self, url, fp, errcode, errmsg, headers, data=None):
diff --git a/lang/python25/patches/patch-bb b/lang/python25/patches/patch-bb
new file mode 100644
index 00000000000..061659d0a5e
--- /dev/null
+++ b/lang/python25/patches/patch-bb
@@ -0,0 +1,21 @@
+$NetBSD: patch-bb,v 1.3 2011/03/28 15:58:15 drochner Exp $
+
+Issue #11662 (CVE-2011-1521)
+
+--- Lib/urllib2.py.orig	2008-04-22 21:17:18.000000000 +0000
++++ Lib/urllib2.py
+@@ -555,6 +555,14 @@ class HTTPRedirectHandler(BaseHandler):
+             return
+         newurl = urlparse.urljoin(req.get_full_url(), newurl)
+ 
++        # For security reasons we do not allow redirects to protocols
++        # other than HTTP, HTTPS or FTP.
++        newurl_lower = newurl.lower()
++        if not (newurl_lower.startswith('http://') or
++                newurl_lower.startswith('https://') or
++		newurl_lower.startswith('ftp://')):
++            return
++
+         # XXX Probably want to forget about the state of the current
+         # request, although that might interact poorly with other
+         # handlers that also use handler-specific request attributes
diff --git a/lang/python25/patches/patch-bc b/lang/python25/patches/patch-bc
new file mode 100644
index 00000000000..5eb5e15d3b3
--- /dev/null
+++ b/lang/python25/patches/patch-bc
@@ -0,0 +1,348 @@
+$NetBSD: patch-bc,v 1.3 2011/03/28 15:58:15 drochner Exp $
+
+Issue #8674/#7673
+
+--- Modules/audioop.c.orig	2008-02-14 11:26:18.000000000 +0000
++++ Modules/audioop.c
+@@ -295,6 +295,29 @@ static int stepsizeTable[89] = {
+ 
+ static PyObject *AudioopError;
+ 
++static int
++audioop_check_size(int size)
++{
++    if (size != 1 && size != 2 && size != 4) {
++        PyErr_SetString(AudioopError, "Size should be 1, 2 or 4");
++        return 0;
++    }
++    else
++        return 1;
++}
++
++static int
++audioop_check_parameters(int len, int size)
++{
++    if (!audioop_check_size(size))
++        return 0;
++    if (len % size != 0) {
++        PyErr_SetString(AudioopError, "not a whole number of frames");
++        return 0;
++    }
++    return 1;
++}
++
+ static PyObject *
+ audioop_getsample(PyObject *self, PyObject *args)
+ {
+@@ -304,10 +327,8 @@ audioop_getsample(PyObject *self, PyObje
+ 
+         if ( !PyArg_ParseTuple(args, "s#ii:getsample", &cp, &len, &size, &i) )
+                 return 0;
+-        if ( size != 1 && size != 2 && size != 4 ) {
+-                PyErr_SetString(AudioopError, "Size should be 1, 2 or 4");
+-                return 0;
+-        }
++        if (!audioop_check_parameters(len, size))
++	        return NULL;
+         if ( i < 0 || i >= len/size ) {
+                 PyErr_SetString(AudioopError, "Index out of range");
+                 return 0;
+@@ -328,10 +349,8 @@ audioop_max(PyObject *self, PyObject *ar
+ 
+         if ( !PyArg_ParseTuple(args, "s#i:max", &cp, &len, &size) )
+                 return 0;
+-        if ( size != 1 && size != 2 && size != 4 ) {
+-                PyErr_SetString(AudioopError, "Size should be 1, 2 or 4");
+-                return 0;
+-        }
++        if (!audioop_check_parameters(len, size))
++                return NULL;
+         for ( i=0; i<len; i+= size) {
+                 if ( size == 1 )      val = (int)*CHARP(cp, i);
+                 else if ( size == 2 ) val = (int)*SHORTP(cp, i);
+@@ -352,10 +371,8 @@ audioop_minmax(PyObject *self, PyObject 
+ 
+         if (!PyArg_ParseTuple(args, "s#i:minmax", &cp, &len, &size))
+                 return NULL;
+-        if (size != 1 && size != 2 && size != 4) {
+-                PyErr_SetString(AudioopError, "Size should be 1, 2 or 4");
++        if (!audioop_check_parameters(len, size))
+                 return NULL;
+-        }
+         for (i = 0; i < len; i += size) {
+                 if (size == 1) val = (int) *CHARP(cp, i);
+                 else if (size == 2) val = (int) *SHORTP(cp, i);
+@@ -376,10 +393,8 @@ audioop_avg(PyObject *self, PyObject *ar
+ 
+         if ( !PyArg_ParseTuple(args, "s#i:avg", &cp, &len, &size) )
+                 return 0;
+-        if ( size != 1 && size != 2 && size != 4 ) {
+-                PyErr_SetString(AudioopError, "Size should be 1, 2 or 4");
+-                return 0;
+-        }
++        if (!audioop_check_parameters(len, size))
++                return NULL;
+         for ( i=0; i<len; i+= size) {
+                 if ( size == 1 )      val = (int)*CHARP(cp, i);
+                 else if ( size == 2 ) val = (int)*SHORTP(cp, i);
+@@ -403,10 +418,8 @@ audioop_rms(PyObject *self, PyObject *ar
+ 
+         if ( !PyArg_ParseTuple(args, "s#i:rms", &cp, &len, &size) )
+                 return 0;
+-        if ( size != 1 && size != 2 && size != 4 ) {
+-                PyErr_SetString(AudioopError, "Size should be 1, 2 or 4");
+-                return 0;
+-        }
++        if (!audioop_check_parameters(len, size))
++                return NULL;
+         for ( i=0; i<len; i+= size) {
+                 if ( size == 1 )      val = (int)*CHARP(cp, i);
+                 else if ( size == 2 ) val = (int)*SHORTP(cp, i);
+@@ -609,10 +622,8 @@ audioop_avgpp(PyObject *self, PyObject *
+ 
+         if ( !PyArg_ParseTuple(args, "s#i:avgpp", &cp, &len, &size) )
+                 return 0;
+-        if ( size != 1 && size != 2 && size != 4 ) {
+-                PyErr_SetString(AudioopError, "Size should be 1, 2 or 4");
+-                return 0;
+-        }
++        if (!audioop_check_parameters(len, size))
++                return NULL;
+         /* Compute first delta value ahead. Also automatically makes us
+         ** skip the first extreme value
+         */
+@@ -666,10 +677,8 @@ audioop_maxpp(PyObject *self, PyObject *
+ 
+         if ( !PyArg_ParseTuple(args, "s#i:maxpp", &cp, &len, &size) )
+                 return 0;
+-        if ( size != 1 && size != 2 && size != 4 ) {
+-                PyErr_SetString(AudioopError, "Size should be 1, 2 or 4");
+-                return 0;
+-        }
++        if (!audioop_check_parameters(len, size))
++                return NULL;
+         /* Compute first delta value ahead. Also automatically makes us
+         ** skip the first extreme value
+         */
+@@ -717,10 +726,8 @@ audioop_cross(PyObject *self, PyObject *
+ 
+         if ( !PyArg_ParseTuple(args, "s#i:cross", &cp, &len, &size) )
+                 return 0;
+-        if ( size != 1 && size != 2 && size != 4 ) {
+-                PyErr_SetString(AudioopError, "Size should be 1, 2 or 4");
+-                return 0;
+-        }
++        if (!audioop_check_parameters(len, size))
++                return NULL;
+         ncross = -1;
+         prevval = 17; /* Anything <> 0,1 */
+         for ( i=0; i<len; i+= size) {
+@@ -745,6 +752,8 @@ audioop_mul(PyObject *self, PyObject *ar
+ 
+         if ( !PyArg_ParseTuple(args, "s#id:mul", &cp, &len, &size, &factor ) )
+                 return 0;
++        if (!audioop_check_parameters(len, size))
++                return NULL;
+     
+         if ( size == 1 ) maxval = (double) 0x7f;
+         else if ( size == 2 ) maxval = (double) 0x7fff;
+@@ -787,6 +796,12 @@ audioop_tomono(PyObject *self, PyObject 
+         if ( !PyArg_ParseTuple(args, "s#idd:tomono",
+ 	                       &cp, &len, &size, &fac1, &fac2 ) )
+                 return 0;
++        if (!audioop_check_parameters(len, size))
++                return NULL;
++        if (((len / size) & 1) != 0) {
++                PyErr_SetString(AudioopError, "not a whole number of frames");
++                return NULL;
++        }
+     
+         if ( size == 1 ) maxval = (double) 0x7f;
+         else if ( size == 2 ) maxval = (double) 0x7fff;
+@@ -832,6 +847,8 @@ audioop_tostereo(PyObject *self, PyObjec
+         if ( !PyArg_ParseTuple(args, "s#idd:tostereo",
+ 	                       &cp, &len, &size, &fac1, &fac2 ) )
+                 return 0;
++        if (!audioop_check_parameters(len, size))
++                return NULL;
+     
+         if ( size == 1 ) maxval = (double) 0x7f;
+         else if ( size == 2 ) maxval = (double) 0x7fff;
+@@ -891,7 +908,8 @@ audioop_add(PyObject *self, PyObject *ar
+         if ( !PyArg_ParseTuple(args, "s#s#i:add",
+                           &cp1, &len1, &cp2, &len2, &size ) )
+                 return 0;
+-
++        if (!audioop_check_parameters(len1, size))
++                return NULL;
+         if ( len1 != len2 ) {
+                 PyErr_SetString(AudioopError, "Lengths should be the same");
+                 return 0;
+@@ -946,10 +964,8 @@ audioop_bias(PyObject *self, PyObject *a
+                           &cp, &len, &size , &bias) )
+                 return 0;
+ 
+-        if ( size != 1 && size != 2 && size != 4) {
+-                PyErr_SetString(AudioopError, "Size should be 1, 2 or 4");
+-                return 0;
+-        }
++        if (!audioop_check_parameters(len, size))
++                return NULL;
+     
+         rv = PyString_FromStringAndSize(NULL, len);
+         if ( rv == 0 )
+@@ -982,10 +998,8 @@ audioop_reverse(PyObject *self, PyObject
+                           &cp, &len, &size) )
+                 return 0;
+ 
+-        if ( size != 1 && size != 2 && size != 4 ) {
+-                PyErr_SetString(AudioopError, "Size should be 1, 2 or 4");
+-                return 0;
+-        }
++        if (!audioop_check_parameters(len, size))
++                return NULL;
+     
+         rv = PyString_FromStringAndSize(NULL, len);
+         if ( rv == 0 )
+@@ -1019,11 +1033,10 @@ audioop_lin2lin(PyObject *self, PyObject
+                           &cp, &len, &size, &size2) )
+                 return 0;
+ 
+-        if ( (size != 1 && size != 2 && size != 4) ||
+-             (size2 != 1 && size2 != 2 && size2 != 4)) {
+-                PyErr_SetString(AudioopError, "Size should be 1, 2 or 4");
+-                return 0;
+-        }
++        if (!audioop_check_parameters(len, size))
++                return NULL;
++        if (!audioop_check_size(size2))
++                return NULL;
+     
+         new_len = (len/size)*size2;
+         if (new_len < 0) {
+@@ -1075,10 +1088,8 @@ audioop_ratecv(PyObject *self, PyObject 
+ 	                      &nchannels, &inrate, &outrate, &state,
+ 			      &weightA, &weightB))
+                 return NULL;
+-        if (size != 1 && size != 2 && size != 4) {
+-                PyErr_SetString(AudioopError, "Size should be 1, 2 or 4");
++        if (!audioop_check_size(size))
+                 return NULL;
+-        }
+         if (nchannels < 1) {
+                 PyErr_SetString(AudioopError, "# of channels should be >= 1");
+                 return NULL;
+@@ -1154,25 +1165,16 @@ audioop_ratecv(PyObject *self, PyObject 
+                    ceiling(len*outrate/inrate) output frames, and each frame
+                    requires bytes_per_frame bytes.  Computing this
+                    without spurious overflow is the challenge; we can
+-                   settle for a reasonable upper bound, though. */
+-                int ceiling;   /* the number of output frames */
+-                int nbytes;    /* the number of output bytes needed */
+-                int q = len / inrate;
+-                /* Now len = q * inrate + r exactly (with r = len % inrate),
+-                   and this is less than q * inrate + inrate = (q+1)*inrate.
+-                   So a reasonable upper bound on len*outrate/inrate is
+-                   ((q+1)*inrate)*outrate/inrate =
+-                   (q+1)*outrate.
+-                */
+-                ceiling = (q+1) * outrate;
+-                nbytes = ceiling * bytes_per_frame;
+-                /* See whether anything overflowed; if not, get the space. */
+-                if (q+1 < 0 ||
+-                    ceiling / outrate != q+1 ||
+-                    nbytes / bytes_per_frame != ceiling)
++		   settle for a reasonable upper bound, though, in this
++		   case ceiling(len/inrate) * outrate. */
++
++	    /* compute ceiling(len/inrate) without overflow */
++	    int q = len > 0 ? 1 + (len - 1) / inrate : 0;
++	    if (outrate > INT_MAX / q / bytes_per_frame)
+                         str = NULL;
+                 else
+-                        str = PyString_FromStringAndSize(NULL, nbytes);
++		    str = PyString_FromStringAndSize(NULL,
++						     q * outrate * bytes_per_frame);
+ 
+                 if (str == NULL) {
+                         PyErr_SetString(PyExc_MemoryError,
+@@ -1265,10 +1267,8 @@ audioop_lin2ulaw(PyObject *self, PyObjec
+                                &cp, &len, &size) )
+                 return 0 ;
+ 
+-        if ( size != 1 && size != 2 && size != 4) {
+-                PyErr_SetString(AudioopError, "Size should be 1, 2 or 4");
+-                return 0;
+-        }
++        if (!audioop_check_parameters(len, size))
++            return NULL;
+     
+         rv = PyString_FromStringAndSize(NULL, len/size);
+         if ( rv == 0 )
+@@ -1299,10 +1299,8 @@ audioop_ulaw2lin(PyObject *self, PyObjec
+                                &cp, &len, &size) )
+                 return 0;
+ 
+-        if ( size != 1 && size != 2 && size != 4) {
+-                PyErr_SetString(AudioopError, "Size should be 1, 2 or 4");
+-                return 0;
+-        }
++        if (!audioop_check_parameters(len, size))
++                return NULL;
+     
+         new_len = len*size;
+         if (new_len < 0) {
+@@ -1339,10 +1337,8 @@ audioop_lin2alaw(PyObject *self, PyObjec
+                                &cp, &len, &size) )
+                 return 0;
+ 
+-        if ( size != 1 && size != 2 && size != 4) {
+-                PyErr_SetString(AudioopError, "Size should be 1, 2 or 4");
+-                return 0;
+-        }
++        if (!audioop_check_parameters(len, size))
++                return NULL;
+     
+         rv = PyString_FromStringAndSize(NULL, len/size);
+         if ( rv == 0 )
+@@ -1373,10 +1369,8 @@ audioop_alaw2lin(PyObject *self, PyObjec
+                                &cp, &len, &size) )
+                 return 0;
+ 
+-        if ( size != 1 && size != 2 && size != 4) {
+-                PyErr_SetString(AudioopError, "Size should be 1, 2 or 4");
+-                return 0;
+-        }
++        if (!audioop_check_parameters(len, size))
++                return NULL;
+     
+         new_len = len*size;
+         if (new_len < 0) {
+@@ -1414,12 +1408,9 @@ audioop_lin2adpcm(PyObject *self, PyObje
+                                &cp, &len, &size, &state) )
+                 return 0;
+     
++        if (!audioop_check_parameters(len, size))
++                return NULL;
+ 
+-        if ( size != 1 && size != 2 && size != 4) {
+-                PyErr_SetString(AudioopError, "Size should be 1, 2 or 4");
+-                return 0;
+-        }
+-    
+         str = PyString_FromStringAndSize(NULL, len/(size*2));
+         if ( str == 0 )
+                 return 0;
+@@ -1522,10 +1513,8 @@ audioop_adpcm2lin(PyObject *self, PyObje
+                                &cp, &len, &size, &state) )
+                 return 0;
+ 
+-        if ( size != 1 && size != 2 && size != 4) {
+-                PyErr_SetString(AudioopError, "Size should be 1, 2 or 4");
+-                return 0;
+-        }
++        if (!audioop_check_parameters(len, size))
++                return NULL;
+     
+         /* Decode state, should have (value, step) */
+         if ( state == Py_None ) {