🛡️ Sentinel: [MEDIUM] 입력 검증에서 발생할 수 있는 정수 오버플로우 문제 수정

.jules/sentinel.md

@@ -2,3 +2,8 @@
 **Vulnerability:** Unvalidated inputs passed to `if()` statements can cause process crashes (`condition has length > 1`) or unexpected coercion vulnerabilities.
 **Learning:** In R, optional boolean parameters that default to `NULL` should be validated using explicit runtime type validation (e.g., `if (!is.null(flag) && (!is.logical(flag) || length(flag) != 1 || is.na(flag)))`).
 **Prevention:** Always implement explicit runtime type validation for optional boolean parameters.
+
+## 2024-08-02 - Fix integer overflow coercion vulnerability in interactive prompts
+**Vulnerability:** Integer overflow coercion vulnerability where excessively large numeric strings pass the `^[0-9]+$` regex check but evaluate to `NA` in `as.integer()`, causing subsequent process crashes.
+**Learning:** When validating interactive `readline()` numeric inputs, strictly match against exact expected values (e.g., `^[12]$`) rather than unbounded digit classes (e.g., `^[0-9]+$`).
+**Prevention:** Always strictly match against exact expected values when validating inputs that evaluate to integers.

R/aFIPC.R

@@ -141,7 +141,7 @@ autoFIPC <-
       }
       for (attempt in seq_len(3)) {
         n <- readline(prompt = "Is it correct? (1: Yes 2: No) : ")
-        if (grepl("^[0-9]+$", n)) {
+        if (grepl("^[12]$", n)) {
           return(as.integer(n))
         }
       }
@@ -171,7 +171,7 @@ autoFIPC <-
               readline(
                 prompt = "Do you want to use default BILOG-MG priors for oldform Data? (1: Yes 2: No) : "
               )
-            if (grepl("^[0-9]+$", n)) {
+            if (grepl("^[12]$", n)) {
               return(as.integer(n))
             }
           }
@@ -390,7 +390,7 @@ autoFIPC <-
               readline(
                 prompt = "Do you want to use default BILOG-MG priors for newform Data? (1: Yes 2: No) : "
               )
-            if (grepl("^[0-9]+$", n)) {
+            if (grepl("^[12]$", n)) {
               return(as.integer(n))
             }
           }