gnu: glib: Fix CVE-2021-27218 and CVE-2021-27219.

[jackhill/guix/guix.git] / gnu / packages / patches / unzip-overflow-long-fsize.patch

Copied from Fedora.

http://pkgs.fedoraproject.org/cgit/unzip.git/plain/unzip-6.0-overflow-long-fsize.patch?id=d18f821e

diff --git a/list.c b/list.c
index f7359c3..4c3d703 100644
--- a/list.c
+++ b/list.c
@@ -97,7 +97,7 @@ int list_files(__G)    /* return PK-type error code */
 {
     int do_this_file=FALSE, cfactor, error, error_in_archive=PK_COOL;
 #ifndef WINDLL
-    char sgn, cfactorstr[10];
+    char sgn, cfactorstr[13];
     int longhdr=(uO.vflag>1);
 #endif
     int date_format;
@@ -339,7 +339,19 @@ 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/tracker/?func=detail
+                 *  &aid=2861648&group_id=118012&atid=679786
+                 * 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? */