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File Report-error-if-dimensions-of-chunked-storage-in-data-layout-2.patch of Package hdf5 (Revision 186a5ae390ac75e0b090c0ff09a446ef)

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From: Egbert Eich <eich@suse.com>
Date: Wed Sep 28 19:11:16 2022 +0200
Subject: Report error if dimensions of chunked storage in data layout < 2
Patch-mainline: Not yet
Git-repo: ssh://eich@192.168.122.1:/home/eich/sources/HPC/hdf5
Git-commit: 34b621424504265cff3c33cf634a70efb52db180
References:

For Data Layout Messages version 1 & 2 the specification state
that the value stored in the data field is 1 greater than the
number of dimensions in the dataspace. For version 3 this is
not explicitly stated but the implementation suggests it to be
the case.
Thus the set value needs to be at least 2. For dimensionality
< 2 an out-of-bounds access occurs as in CVE-2021-45833.

This fixes CVE-2021-45833.

Signed-off-by: Egbert Eich <eich@suse.com>
Signed-off-by: Egbert Eich <eich@suse.de>
---
 src/H5Olayout.c | 7 +++++++
 1 file changed, 7 insertions(+)
diff --git a/src/H5Olayout.c b/src/H5Olayout.c
index c939e72744..9fa9e36e8c 100644
--- a/src/H5Olayout.c
+++ b/src/H5Olayout.c
@@ -168,6 +168,10 @@ H5O__layout_decode(H5F_t *f, H5O_t H5_ATTR_UNUSED *open_oh, unsigned H5_ATTR_UNU
             p += ndims * 4; /* Skip over dimension sizes (32-bit quantities) */
         }                   /* end if */
         else {
+            if (ndims < 2)
+                HGOTO_ERROR(H5E_OHDR, H5E_CANTLOAD, NULL,
+                            "bad dimensions for chunked storage")
+
             mesg->u.chunk.ndims = ndims;
             for (u = 0; u < ndims; u++)
                 UINT32DECODE(p, mesg->u.chunk.dim[u]);
@@ -241,6 +245,9 @@ H5O__layout_decode(H5F_t *f, H5O_t H5_ATTR_UNUSED *open_oh, unsigned H5_ATTR_UNU
                     mesg->u.chunk.ndims = *p++;
                     if (mesg->u.chunk.ndims > H5O_LAYOUT_NDIMS)
                         HGOTO_ERROR(H5E_OHDR, H5E_CANTLOAD, NULL, "dimensionality is too large")
+                    if (mesg->u.chunk.ndims < 2)
+                        HGOTO_ERROR(H5E_OHDR, H5E_CANTLOAD, NULL,
+                                    "bad dimensions for chunked storage")
 
                     /* B-tree address */
                     H5F_addr_decode(f, &p, &(mesg->storage.u.chunk.idx_addr));

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File Report-error-if-dimensions-of-chunked-storage-in-data-layout-2.patch of Package hdf5 (Revision 186a5ae390ac75e0b090c0ff09a446ef)

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