unzip: patch CVE-2014-9913 and CVE-2016-9844 vulnerabilities

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
2026-04-30 15:38:40 +01:00 · 2017-01-23 17:53:03 +01:00
parent bf540fdc19
commit 5aa0c8b54b
3 changed files with 59 additions and 2 deletions
@@ -0,0 +1,29 @@
+From: "Steven M. Schweda" <sms@antinode.info>
+Subject: Fix CVE-2014-9913, buffer overflow in unzip
+Bug: https://sourceforge.net/p/infozip/bugs/27/
+Bug-Debian: https://bugs.debian.org/847485
+Bug-Ubuntu: https://launchpad.net/bugs/387350
+X-Debian-version: 6.0-21
+
+--- a/list.c
+++ b/list.c
+@@ -339,7 +339,18 @@ int list_files(__G)    /* return PK-type
+                 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? */