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Possible overflow in mbedtls_x509_set_extension(..) which leads to a segementation fault #527

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Possible overflow in mbedtls_x509_set_extension(..) which leads to a segementation fault #527

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4 changes: 4 additions & 0 deletions Logan/mbedtls/library/x509_create.c
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Original file line number Diff line number Diff line change
Expand Up @@ -168,6 +168,10 @@ int mbedtls_x509_set_extension( mbedtls_asn1_named_data **head, const char *oid,
{
mbedtls_asn1_named_data *cur;

if (val_len > (SIZE_MAX - 1)) {
return MBEDTLS_ERR_X509_BAD_INPUT_DATA;
}

if( ( cur = mbedtls_asn1_store_named_data( head, oid, oid_len,
NULL, val_len + 1 ) ) == NULL )
{
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