From bc2aeeb7bd059aa1ee9e6457a53204416c33efd8 Mon Sep 17 00:00:00 2001 From: Aleksander Morgado Date: Thu, 30 Mar 2023 19:41:02 +0000 Subject: sms-part-3gpp: fix invalid memory read parsing address [debug] parsing PDU (0)... [debug] no SMSC address given [debug] status report type PDU detected [debug] message reference: 191 [debug] address size: 0 digits (0 bytes) ==78906== Command: ./build/test/mmsmspdu --pdu=000ABF00 --verbose ==78906== ==78906== Invalid read of size 1 ==78906== at 0x10AA80: sms_decode_address (mm-sms-part-3gpp.c:132) ==78906== by 0x10AF7C: mm_sms_part_3gpp_new_from_binary_pdu (mm-sms-part-3gpp.c:507) ==78906== by 0x10BE17: mm_sms_part_3gpp_new_from_pdu (mm-sms-part-3gpp.c:368) ==78906== by 0x10A44D: main (mmsmspdu.c:202) ==78906== Address 0x5199874 is 0 bytes after a block of size 4 alloc'd ==78906== at 0x48455EF: calloc (vg_replace_malloc.c:1328) ==78906== by 0x49DF6C0: g_malloc0 (in /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.7400.2) ==78906== by 0x48ABD24: mm_utils_hexstr2bin (mm-common-helpers.c:1884) ==78906== by 0x10BDF6: mm_sms_part_3gpp_new_from_pdu (mm-sms-part-3gpp.c:362) ==78906== by 0x10A44D: main (mmsmspdu.c:202) --- src/mm-sms-part-3gpp.c | 8 ++++++++ src/tests/test-sms-part-3gpp.c | 9 +++++++++ 2 files changed, 17 insertions(+) (limited to 'src') diff --git a/src/mm-sms-part-3gpp.c b/src/mm-sms-part-3gpp.c index 8a36cab3..4244de0c 100644 --- a/src/mm-sms-part-3gpp.c +++ b/src/mm-sms-part-3gpp.c @@ -500,7 +500,15 @@ mm_sms_part_3gpp_new_from_binary_pdu (guint index, PDU_SIZE_CHECK (offset + 1, "cannot read number of digits in number"); tp_addr_size_digits = pdu[offset++]; tp_addr_size_bytes = (tp_addr_size_digits + 1) >> 1; + mm_obj_dbg (log_object, " address size: %u digits (%u bytes)", + tp_addr_size_digits, tp_addr_size_bytes); + if (tp_addr_size_bytes == 0) { + g_set_error (error, MM_CORE_ERROR, MM_CORE_ERROR_FAILED, + "Couldn't read address: field missing"); + mm_sms_part_free (sms_part); + return NULL; + } PDU_SIZE_CHECK (offset + tp_addr_size_bytes, "cannot read number"); address = sms_decode_address (&pdu[offset], tp_addr_size_digits, error); if (!address) { diff --git a/src/tests/test-sms-part-3gpp.c b/src/tests/test-sms-part-3gpp.c index e4483240..d6573b13 100644 --- a/src/tests/test-sms-part-3gpp.c +++ b/src/tests/test-sms-part-3gpp.c @@ -441,6 +441,14 @@ test_pdu_insufficient_data (void) common_test_invalid_pdu (pdu, G_N_ELEMENTS (pdu)); } +static void +test_pdu_no_address (void) +{ + static const guint8 pdu[] = { 0x00, 0x0A, 0xBF, 0x00 }; + + common_test_invalid_pdu (pdu, G_N_ELEMENTS (pdu)); +} + /********************* SMS ADDRESS ENCODER TESTS *********************/ static void @@ -737,6 +745,7 @@ int main (int argc, char **argv) g_test_add_func ("/MM/SMS/3GPP/PDU-Parser/pdu-stored-by-us", test_pdu_stored_by_us); g_test_add_func ("/MM/SMS/3GPP/PDU-Parser/pdu-not-stored", test_pdu_not_stored); g_test_add_func ("/MM/SMS/3GPP/PDU-Parser/pdu-insufficient-data", test_pdu_insufficient_data); + g_test_add_func ("/MM/SMS/3GPP/PDU-Parser/pdu-no-address", test_pdu_no_address); g_test_add_func ("/MM/SMS/3GPP/Address-Encoder/smsc-intl", test_address_encode_smsc_intl); g_test_add_func ("/MM/SMS/3GPP/Address-Encoder/smsc-unknown", test_address_encode_smsc_unknown); -- cgit v1.2.3-70-g09d2