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Improve the read size buffer checking #436

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dgarske wants to merge 1 commit into from
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Improve the read size buffer checking #436

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7 changes: 7 additions & 0 deletions src/tpm2_packet.c
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Original file line number Diff line number Diff line change
Expand Up @@ -955,6 +955,13 @@ TPM_RC TPM2_Packet_Parse(TPM_RC rc, TPM2_Packet* packet)
TPM2_Packet_ParseU16(packet, NULL); /* tag */
TPM2_Packet_ParseU32(packet, &respSz); /* response size */
TPM2_Packet_ParseU32(packet, &tmpRc); /* response code */
if (respSz > (UINT32)packet->size) {
#ifdef DEBUG_WOLFTPM
printf("Response size %d is greater than packet buffer size %d\n",
respSz, packet->size);
#endif
return TPM_RC_FAILURE;
}
packet->size = respSz;
rc = tmpRc;
}
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