Merge pull request #908 in HDFFV/hdf5 from ~DEROBINS/hdf5_der:hdffv_10354 to develop

* commit '4faf4d335b638215c2220564b894e909ff322ca8':
  Fix for HDFFV-10354 (CVE-2017-17505).

1 files changed, 23 insertions, 0 deletions

diff --git a/release_docs/RELEASE.txt b/release_docs/RELEASE.txt
index 480bb14..330082b 100644
--- a/release_docs/RELEASE.txt
+++ b/release_docs/RELEASE.txt
@@ -232,6 +232,29 @@ Bug Fixes since HDF5-1.10.1 release
 
       (DER - 2017/11/21, HDFFV-10330)
 
+    - If an HDF5 file contains a filter pipeline message with a 'number of
+      filters' field that exceeds the maximum number of allowed filters,
+      the error handling code will attempt to dereference a NULL pointer.
+
+      This issue was reported to The HDF Group as issue #CVE-2017-17505.
+
+      NOTE: The HDF5 C library cannot produce such a file. This condition
+            should only occur in a corrupt (or deliberately altered) file
+            or a file created by third-party software.
+
+      This problem arose because the error handling code assumed that
+      the 'number of filters' field implied that a dynamic array of that
+      size had already been created and that the cleanup code should
+      iterate over that array and clean up each element's resources. If
+      an error occurred before the array has been allocated, this will
+      not be true.
+
+      This has been changed so that the number of filters is set to
+      zero on errors. Additionally, the filter array traversal in the
+      error handling code now requires that the filter array not be NULL.
+
+      (DER - 2018/02/06, HDFFV-10354)
+
     - If an HDF5 file contains a malformed compound type which contains
       a member of size zero, a division by zero error will occur while
       processing the type.