Issue #7673: Fix security vulnerability (CVE-2010-2089) in the audioop module,

ensure that the input string length is a multiple of the frame size

Lib/test/test_audioop.py

@@ -20,6 +20,12 @@ def gendata4():
 
 data = [gendata1(), gendata2(), gendata4()]
 
+INVALID_DATA = [
+    ('abc', 0),
+    ('abc', 2),
+    ('abc', 4),
+]
+
 
 class TestAudioop(unittest.TestCase):
 
@@ -166,6 +172,33 @@ class TestAudioop(unittest.TestCase):
         self.assertRaises(audioop.error,
             audioop.findmax, ''.join( chr(x) for x in xrange(256)), -2392392)
 
+    def test_issue7673(self):
+        state = None
+        for data, size in INVALID_DATA:
+            size2 = size
+            self.assertRaises(audioop.error, audioop.getsample, data, size, 0)
+            self.assertRaises(audioop.error, audioop.max, data, size)
+            self.assertRaises(audioop.error, audioop.minmax, data, size)
+            self.assertRaises(audioop.error, audioop.avg, data, size)
+            self.assertRaises(audioop.error, audioop.rms, data, size)
+            self.assertRaises(audioop.error, audioop.avgpp, data, size)
+            self.assertRaises(audioop.error, audioop.maxpp, data, size)
+            self.assertRaises(audioop.error, audioop.cross, data, size)
+            self.assertRaises(audioop.error, audioop.mul, data, size, 1.0)
+            self.assertRaises(audioop.error, audioop.tomono, data, size, 0.5, 0.5)
+            self.assertRaises(audioop.error, audioop.tostereo, data, size, 0.5, 0.5)
+            self.assertRaises(audioop.error, audioop.add, data, data, size)
+            self.assertRaises(audioop.error, audioop.bias, data, size, 0)
+            self.assertRaises(audioop.error, audioop.reverse, data, size)
+            self.assertRaises(audioop.error, audioop.lin2lin, data, size, size2)
+            self.assertRaises(audioop.error, audioop.ratecv, data, size, 1, 1, 1, state)
+            self.assertRaises(audioop.error, audioop.lin2ulaw, data, size)
+            self.assertRaises(audioop.error, audioop.ulaw2lin, data, size)
+            self.assertRaises(audioop.error, audioop.lin2alaw, data, size)
+            self.assertRaises(audioop.error, audioop.alaw2lin, data, size)
+            self.assertRaises(audioop.error, audioop.lin2adpcm, data, size, state)
+            self.assertRaises(audioop.error, audioop.adpcm2lin, data, size, state)
+
 def test_main():
     run_unittest(TestAudioop)
 

Misc/NEWS

@@ -17,6 +17,9 @@ Core and Builtins
 Library
 -------
 
+- Issue #7673: Fix security vulnerability (CVE-2010-2089) in the audioop
+  module, ensure that the input string length is a multiple of the frame size
+
 - Issue #9075: In the ssl module, remove the setting of a ``debug`` flag
   on an OpenSSL structure.
 
@@ -51,7 +54,7 @@ Build
 Library
 -------
 
-- Issue #6589: cleanup asyncore.socket_map in case smtpd.SMTPServer constructor 
+- Issue #6589: cleanup asyncore.socket_map in case smtpd.SMTPServer constructor
   raises an exception.
 
 - Issue #8959: fix regression caused by using unmodified libffi