1 files changed, 36 insertions, 0 deletions
diff --git a/pkg/unzip/patch/0019-Fix-CVE-2016-9844-buffer-overflow-in-zipinfo.patch b/pkg/unzip/patch/0019-Fix-CVE-2016-9844-buffer-overflow-in-zipinfo.patch
new file mode 100644
index 00000000..55919183
--- /dev/null
+++ b/pkg/unzip/patch/0019-Fix-CVE-2016-9844-buffer-overflow-in-zipinfo.patch
@@ -0,0 +1,36 @@
+From 7e0435546230ecebe3bfe1ac27eb0186c702c509 Mon Sep 17 00:00:00 2001
+From: "Steven M. Schweda" <sms@antinode.info>
+Date: Sat, 15 Jun 2019 18:13:11 -0700
+Subject: [PATCH] Fix CVE-2016-9844, buffer overflow in zipinfo
+
+---
+ zipinfo.c | 13 ++++++++++++-
+ 1 file changed, 12 insertions(+), 1 deletion(-)
+
+diff --git a/zipinfo.c b/zipinfo.c
+index 5e77018..0be3e5b 100644
+--- a/zipinfo.c
++++ b/zipinfo.c
+@@ -1921,7 +1921,18 @@ static int zi_short(__G)   /* return PK-type error code */
+         ush  dnum=(ush)((G.crec.general_purpose_bit_flag>>1) & 3);
+         methbuf[3] = dtype[dnum];
+     } else if (methnum >= NUM_METHODS) {   /* unknown */
+-        sprintf(&methbuf[1], "%03u", G.crec.compression_method);
++        /* 2016-12-05 SMS.
++         * https://launchpad.net/bugs/1643750
++         * Unexpectedly large compression methods overflow
++         * &methbuf[].  Use the old, three-digit decimal format
++         * for values which fit.  Otherwise, sacrifice the "u",
++         * and use four-digit hexadecimal.
++         */
++        if (G.crec.compression_method <= 999) {
++            sprintf( &methbuf[ 1], "%03u", G.crec.compression_method);
++        } else {
++            sprintf( &methbuf[ 0], "%04X", G.crec.compression_method);
++        }
+     }
+ 
+     for (k = 0;  k < 15;  ++k)
+-- 
+2.20.1
+