CVE-2025-1632_CVE-2025-25724.patch

From c9bc934e7e91d302e0feca6e713ccc38d6d01532 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Peter=20K=C3=A4stle?= <peter@piie.net>
Date: Mon, 10 Mar 2025 16:43:04 +0100
Subject: [PATCH] fix CVE-2025-1632 and CVE-2025-25724 (#2532)

Hi,

please find my approach to fix the CVE-2025-1632 and CVE-2025-25724
vulnerabilities in this pr.
As both error cases did trigger a NULL pointer deref (and triggered
hopefully everywhere a coredump), we can safely replace the actual
information by a predefined invalid string without breaking any
functionality.

---------

Signed-off-by: Peter Kaestle <peter@piie.net>
---
 tar/util.c       |  5 ++++-
 unzip/bsdunzip.c | 10 +++++++---
 2 files changed, 11 insertions(+), 4 deletions(-)

diff --git a/tar/util.c b/tar/util.c
index 3b099cb5f..f3cbdf0bb 100644
--- a/tar/util.c
+++ b/tar/util.c
@@ -749,7 +749,10 @@ list_item_verbose(struct bsdtar *bsdtar, FILE *out, struct archive_entry *entry)
 #else
 	ltime = localtime(&tim);
 #endif
-	strftime(tmp, sizeof(tmp), fmt, ltime);
+	if (ltime)
+		strftime(tmp, sizeof(tmp), fmt, ltime);
+	else
+		sprintf(tmp, "-- -- ----");
 	fprintf(out, " %s ", tmp);
 	safe_fprintf(out, "%s", archive_entry_pathname(entry));
 
diff --git a/unzip/bsdunzip.c b/unzip/bsdunzip.c
index 7c8cafc3e..4a9028b79 100644
--- a/unzip/bsdunzip.c
+++ b/unzip/bsdunzip.c
@@ -876,6 +876,7 @@ list(struct archive *a, struct archive_entry *e)
 	char buf[20];
 	time_t mtime;
 	struct tm *tm;
+	const char *pathname;
 
 	mtime = archive_entry_mtime(e);
 	tm = localtime(&mtime);
@@ -884,22 +885,25 @@ list(struct archive *a, struct archive_entry *e)
 	else
 		strftime(buf, sizeof(buf), "%m-%d-%g %R", tm);
 
+	pathname = archive_entry_pathname(e);
+	if (!pathname)
+		pathname = "";
 	if (!zipinfo_mode) {
 		if (v_opt == 1) {
 			printf(" %8ju  %s   %s\n",
 			    (uintmax_t)archive_entry_size(e),
-			    buf, archive_entry_pathname(e));
+			    buf, pathname);
 		} else if (v_opt == 2) {
 			printf("%8ju  Stored  %7ju   0%%  %s  %08x  %s\n",
 			    (uintmax_t)archive_entry_size(e),
 			    (uintmax_t)archive_entry_size(e),
 			    buf,
 			    0U,
-			    archive_entry_pathname(e));
+			    pathname);
 		}
 	} else {
 		if (Z1_opt)
-			printf("%s\n",archive_entry_pathname(e));
+			printf("%s\n", pathname);
 	}
 	ac(archive_read_data_skip(a));
 }