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From 2e856c62e68c9f53c232a9d74a210385ab6a3702 Mon Sep 17 00:00:00 2001
From: OpenWrt community <openwrt-devel@lists.openwrt.org>
Date: Mon, 30 Oct 2023 14:52:11 +0100
Subject: [PATCH] fix: buffer overflow in the list_files function
https://nvd.nist.gov/vuln/detail/CVE-2014-9913
CVE: CVE-2014-9913
---
list.c | 13 ++++++++++++-
1 file changed, 12 insertions(+), 1 deletion(-)
diff --git a/list.c b/list.c
index 15e0011..3a3d1cd 100644
--- a/list.c
+++ b/list.c
@@ -339,7 +339,18 @@ int list_files(__G) /* return PK-type error code */
G.crec.compression_method == ENHDEFLATED) {
methbuf[5] = dtype[(G.crec.general_purpose_bit_flag>>1) & 3];
} else if (methnum >= NUM_METHODS) {
- sprintf(&methbuf[4], "%03u", G.crec.compression_method);
+ /* 2013-02-26 SMS.
+ * http://sourceforge.net/p/infozip/bugs/27/ CVE-2014-9913.
+ * Unexpectedly large compression methods overflow
+ * &methbuf[]. Use the old, three-digit decimal format
+ * for values which fit. Otherwise, sacrifice the
+ * colon, and use four-digit hexadecimal.
+ */
+ if (G.crec.compression_method <= 999) {
+ sprintf( &methbuf[ 4], "%03u", G.crec.compression_method);
+ } else {
+ sprintf( &methbuf[ 3], "%04X", G.crec.compression_method);
+ }
}
#if 0 /* GRR/Euro: add this? */
--
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