wget: Security fix CVE-2016-4971

affects wget < 1.18.0

(From OE-Core rev: f4ea85d9c33a18f9e18e789a3399cf2d5c4f8164)

Signed-off-by: Armin Kuster <akuster@mvista.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-extended/wget/wget/CVE-2016-4971.patch

@@ -0,0 +1,295 @@
+From e996e322ffd42aaa051602da182d03178d0f13e1 Mon Sep 17 00:00:00 2001
+From: Giuseppe Scrivano <gscrivan@redhat.com>
+Date: Mon, 6 Jun 2016 21:20:24 +0200
+Subject: [PATCH] ftp: understand --trust-server-names on a HTTP->FTP redirect
+
+If not --trust-server-names is used, FTP will also get the destination
+file name from the original url specified by the user instead of the
+redirected url.  Closes CVE-2016-4971.
+
+* src/ftp.c (ftp_get_listing): Add argument original_url.
+(getftp): Likewise.
+(ftp_loop_internal): Likewise.  Use original_url to generate the
+file name if --trust-server-names is not provided.
+(ftp_retrieve_glob): Likewise.
+(ftp_loop): Likewise.
+
+Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
+
+Upstream-Status: Backport
+CVE: CVE-2016-4971
+Signed-off-by: Armin Kuster <akuster@mvista.com>
+
+---
+ src/ftp.c  | 71 +++++++++++++++++++++++++++++++++++++-------------------------
+ src/ftp.h  |  3 ++-
+ src/retr.c |  3 ++-
+ 3 files changed, 47 insertions(+), 30 deletions(-)
+
+Index: wget-1.17.1/src/ftp.c
+===================================================================
+--- wget-1.17.1.orig/src/ftp.c
++++ wget-1.17.1/src/ftp.c
+@@ -236,7 +236,7 @@ print_length (wgint size, wgint start, b
+   logputs (LOG_VERBOSE, !authoritative ? _(" (unauthoritative)\n") : "\n");
+ }
+ 
+-static uerr_t ftp_get_listing (struct url *, ccon *, struct fileinfo **);
++static uerr_t ftp_get_listing (struct url *, struct url *, ccon *, struct fileinfo **);
+ 
+ static uerr_t
+ get_ftp_greeting(int csock, ccon *con)
+@@ -315,7 +315,8 @@ init_control_ssl_connection (int csock,
+    and closes the control connection in case of error.  If warc_tmp
+    is non-NULL, the downloaded data will be written there as well.  */
+ static uerr_t
+-getftp (struct url *u, wgint passed_expected_bytes, wgint *qtyread,
++getftp (struct url *u, struct url *original_url,
++        wgint passed_expected_bytes, wgint *qtyread,
+         wgint restval, ccon *con, int count, wgint *last_expected_bytes,
+         FILE *warc_tmp)
+ {
+@@ -1189,7 +1190,7 @@ Error in server response, closing contro
+         {
+           bool exists = false;
+           struct fileinfo *f;
+-          uerr_t _res = ftp_get_listing (u, con, &f);
++          uerr_t _res = ftp_get_listing (u, original_url, con, &f);
+           /* Set the DO_RETR command flag again, because it gets unset when
+              calling ftp_get_listing() and would otherwise cause an assertion
+              failure earlier on when this function gets repeatedly called
+@@ -1780,8 +1781,8 @@ exit_error:
+    This loop either gets commands from con, or (if ON_YOUR_OWN is
+    set), makes them up to retrieve the file given by the URL.  */
+ static uerr_t
+-ftp_loop_internal (struct url *u, struct fileinfo *f, ccon *con, char **local_file,
+-                   bool force_full_retrieve)
++ftp_loop_internal (struct url *u, struct url *original_url, struct fileinfo *f,
++                   ccon *con, char **local_file, bool force_full_retrieve)
+ {
+   int count, orig_lp;
+   wgint restval, len = 0, qtyread = 0;
+@@ -1806,7 +1807,7 @@ ftp_loop_internal (struct url *u, struct
+     {
+       /* URL-derived file.  Consider "-O file" name. */
+       xfree (con->target);
+-      con->target = url_file_name (u, NULL);
++      con->target = url_file_name (opt.trustservernames || !original_url ? u : original_url, NULL);
+       if (!opt.output_document)
+         locf = con->target;
+       else
+@@ -1924,8 +1925,8 @@ ftp_loop_internal (struct url *u, struct
+ 
+       /* If we are working on a WARC record, getftp should also write
+          to the warc_tmp file. */
+-      err = getftp (u, len, &qtyread, restval, con, count, &last_expected_bytes,
+-                    warc_tmp);
++      err = getftp (u, original_url, len, &qtyread, restval, con, count,
++                    &last_expected_bytes, warc_tmp);
+ 
+       if (con->csock == -1)
+         con->st &= ~DONE_CWD;
+@@ -2093,7 +2094,8 @@ Removing file due to --delete-after in f
+ /* Return the directory listing in a reusable format.  The directory
+    is specifed in u->dir.  */
+ static uerr_t
+-ftp_get_listing (struct url *u, ccon *con, struct fileinfo **f)
++ftp_get_listing (struct url *u, struct url *original_url, ccon *con,
++                 struct fileinfo **f)
+ {
+   uerr_t err;
+   char *uf;                     /* url file name */
+@@ -2114,7 +2116,7 @@ ftp_get_listing (struct url *u, ccon *co
+ 
+   con->target = xstrdup (lf);
+   xfree (lf);
+-  err = ftp_loop_internal (u, NULL, con, NULL, false);
++  err = ftp_loop_internal (u, original_url, NULL, con, NULL, false);
+   lf = xstrdup (con->target);
+   xfree (con->target);
+   con->target = old_target;
+@@ -2137,8 +2139,9 @@ ftp_get_listing (struct url *u, ccon *co
+   return err;
+ }
+ 
+-static uerr_t ftp_retrieve_dirs (struct url *, struct fileinfo *, ccon *);
+-static uerr_t ftp_retrieve_glob (struct url *, ccon *, int);
++static uerr_t ftp_retrieve_dirs (struct url *, struct url *,
++                                 struct fileinfo *, ccon *);
++static uerr_t ftp_retrieve_glob (struct url *, struct url *, ccon *, int);
+ static struct fileinfo *delelement (struct fileinfo *, struct fileinfo **);
+ static void freefileinfo (struct fileinfo *f);
+ 
+@@ -2150,7 +2153,8 @@ static void freefileinfo (struct fileinf
+    If opt.recursive is set, after all files have been retrieved,
+    ftp_retrieve_dirs will be called to retrieve the directories.  */
+ static uerr_t
+-ftp_retrieve_list (struct url *u, struct fileinfo *f, ccon *con)
++ftp_retrieve_list (struct url *u, struct url *original_url,
++                   struct fileinfo *f, ccon *con)
+ {
+   static int depth = 0;
+   uerr_t err;
+@@ -2311,7 +2315,10 @@ Already have correct symlink %s -> %s\n\
+           else                /* opt.retr_symlinks */
+             {
+               if (dlthis)
+-                err = ftp_loop_internal (u, f, con, NULL, force_full_retrieve);
++                {
++                  err = ftp_loop_internal (u, original_url, f, con, NULL,
++                                           force_full_retrieve);
++                }
+             } /* opt.retr_symlinks */
+           break;
+         case FT_DIRECTORY:
+@@ -2322,7 +2329,10 @@ Already have correct symlink %s -> %s\n\
+         case FT_PLAINFILE:
+           /* Call the retrieve loop.  */
+           if (dlthis)
+-            err = ftp_loop_internal (u, f, con, NULL, force_full_retrieve);
++            {
++              err = ftp_loop_internal (u, original_url, f, con, NULL,
++                                       force_full_retrieve);
++            }
+           break;
+         case FT_UNKNOWN:
+           logprintf (LOG_NOTQUIET, _("%s: unknown/unsupported file type.\n"),
+@@ -2387,7 +2397,7 @@ Already have correct symlink %s -> %s\n\
+   /* We do not want to call ftp_retrieve_dirs here */
+   if (opt.recursive &&
+       !(opt.reclevel != INFINITE_RECURSION && depth >= opt.reclevel))
+-    err = ftp_retrieve_dirs (u, orig, con);
++    err = ftp_retrieve_dirs (u, original_url, orig, con);
+   else if (opt.recursive)
+     DEBUGP ((_("Will not retrieve dirs since depth is %d (max %d).\n"),
+              depth, opt.reclevel));
+@@ -2400,7 +2410,8 @@ Already have correct symlink %s -> %s\n\
+    ftp_retrieve_glob on each directory entry.  The function knows
+    about excluded directories.  */
+ static uerr_t
+-ftp_retrieve_dirs (struct url *u, struct fileinfo *f, ccon *con)
++ftp_retrieve_dirs (struct url *u, struct url *original_url,
++                   struct fileinfo *f, ccon *con)
+ {
+   char *container = NULL;
+   int container_size = 0;
+@@ -2450,7 +2461,7 @@ Not descending to %s as it is excluded/n
+       odir = xstrdup (u->dir);  /* because url_set_dir will free
+                                    u->dir. */
+       url_set_dir (u, newdir);
+-      ftp_retrieve_glob (u, con, GLOB_GETALL);
++      ftp_retrieve_glob (u, original_url, con, GLOB_GETALL);
+       url_set_dir (u, odir);
+       xfree (odir);
+ 
+@@ -2509,14 +2520,15 @@ is_invalid_entry (struct fileinfo *f)
+    GLOB_GLOBALL, use globbing; if it's GLOB_GETALL, download the whole
+    directory.  */
+ static uerr_t
+-ftp_retrieve_glob (struct url *u, ccon *con, int action)
++ftp_retrieve_glob (struct url *u, struct url *original_url,
++                   ccon *con, int action)
+ {
+   struct fileinfo *f, *start;
+   uerr_t res;
+ 
+   con->cmd |= LEAVE_PENDING;
+ 
+-  res = ftp_get_listing (u, con, &start);
++  res = ftp_get_listing (u, original_url, con, &start);
+   if (res != RETROK)
+     return res;
+   /* First: weed out that do not conform the global rules given in
+@@ -2612,7 +2624,7 @@ ftp_retrieve_glob (struct url *u, ccon *
+   if (start)
+     {
+       /* Just get everything.  */
+-      res = ftp_retrieve_list (u, start, con);
++      res = ftp_retrieve_list (u, original_url, start, con);
+     }
+   else
+     {
+@@ -2628,7 +2640,7 @@ ftp_retrieve_glob (struct url *u, ccon *
+         {
+           /* Let's try retrieving it anyway.  */
+           con->st |= ON_YOUR_OWN;
+-          res = ftp_loop_internal (u, NULL, con, NULL, false);
++          res = ftp_loop_internal (u, original_url, NULL, con, NULL, false);
+           return res;
+         }
+ 
+@@ -2648,8 +2660,8 @@ ftp_retrieve_glob (struct url *u, ccon *
+    of URL.  Inherently, its capabilities are limited on what can be
+    encoded into a URL.  */
+ uerr_t
+-ftp_loop (struct url *u, char **local_file, int *dt, struct url *proxy,
+-          bool recursive, bool glob)
++ftp_loop (struct url *u, struct url *original_url, char **local_file, int *dt,
++          struct url *proxy, bool recursive, bool glob)
+ {
+   ccon con;                     /* FTP connection */
+   uerr_t res;
+@@ -2670,16 +2682,17 @@ ftp_loop (struct url *u, char **local_fi
+   if (!*u->file && !recursive)
+     {
+       struct fileinfo *f;
+-      res = ftp_get_listing (u, &con, &f);
++      res = ftp_get_listing (u, original_url, &con, &f);
+ 
+       if (res == RETROK)
+         {
+           if (opt.htmlify && !opt.spider)
+             {
++              struct url *url_file = opt.trustservernames ? u : original_url;
+               char *filename = (opt.output_document
+                                 ? xstrdup (opt.output_document)
+                                 : (con.target ? xstrdup (con.target)
+-                                   : url_file_name (u, NULL)));
++                                   : url_file_name (url_file, NULL)));
+               res = ftp_index (filename, u, f);
+               if (res == FTPOK && opt.verbose)
+                 {
+@@ -2724,11 +2737,13 @@ ftp_loop (struct url *u, char **local_fi
+           /* ftp_retrieve_glob is a catch-all function that gets called
+              if we need globbing, time-stamping, recursion or preserve
+              permissions.  Its third argument is just what we really need.  */
+-          res = ftp_retrieve_glob (u, &con,
++          res = ftp_retrieve_glob (u, original_url, &con,
+                                    ispattern ? GLOB_GLOBALL : GLOB_GETONE);
+         }
+       else
+-        res = ftp_loop_internal (u, NULL, &con, local_file, false);
++        {
++          res = ftp_loop_internal (u, original_url, NULL, &con, local_file, false);
++        }
+     }
+   if (res == FTPOK)
+     res = RETROK;
+Index: wget-1.17.1/src/ftp.h
+===================================================================
+--- wget-1.17.1.orig/src/ftp.h
++++ wget-1.17.1/src/ftp.h
+@@ -169,7 +169,8 @@ enum wget_ftp_fstatus
+ };
+ 
+ struct fileinfo *ftp_parse_ls (const char *, const enum stype);
+-uerr_t ftp_loop (struct url *, char **, int *, struct url *, bool, bool);
++uerr_t ftp_loop (struct url *, struct url *, char **, int *, struct url *,
++                 bool, bool);
+ 
+ uerr_t ftp_index (const char *, struct url *, struct fileinfo *);
+ 
+Index: wget-1.17.1/src/retr.c
+===================================================================
+--- wget-1.17.1.orig/src/retr.c
++++ wget-1.17.1/src/retr.c
+@@ -830,7 +830,8 @@ retrieve_url (struct url * orig_parsed,
+       if (redirection_count)
+         oldrec = glob = false;
+ 
+-      result = ftp_loop (u, &local_file, dt, proxy_url, recursive, glob);
++      result = ftp_loop (u, orig_parsed, &local_file, dt, proxy_url,
++                         recursive, glob);
+       recursive = oldrec;
+ 
+       /* There is a possibility of having HTTP being redirected to

meta/recipes-extended/wget/wget_1.17.1.bb

@@ -1,5 +1,6 @@
 SRC_URI = "${GNU_MIRROR}/wget/wget-${PV}.tar.gz \
            file://0001-Unset-need_charset_alias-when-building-for-musl.patch \
+           file://CVE-2016-4971.patch \
           "
 
 SRC_URI[md5sum] = "a6a908c9ae0e6a4194c628974cc3f05a"