diff --git a/screen-4.3.1-crypt.patch b/screen-4.3.1-crypt.patch
new file mode 100644
index 0000000000000000000000000000000000000000..63a1578b096908566753101b394e19b7a286a4bc
--- /dev/null
+++ b/screen-4.3.1-crypt.patch
@@ -0,0 +1,13 @@
+diff --git a/misc.c b/misc.c
+index 43e93a2..178fda9 100644
+--- a/misc.c
++++ b/misc.c
+@@ -56,6 +56,8 @@ register const char *str;
+ {
+   register char *cp;
+ 
++  if(str == NULL)
++    Panic(0, "SaveStr() received NULL - possibly failed crypt()");
+   if ((cp = malloc(strlen(str) + 1)) == NULL)
+     Panic(0, "%s", strnomem);
+   else
diff --git a/screen-4.3.1-screenrc.patch b/screen-4.3.1-screenrc.patch
new file mode 100644
index 0000000000000000000000000000000000000000..67e36982bf529b7d03626fc56251b899755726cd
--- /dev/null
+++ b/screen-4.3.1-screenrc.patch
@@ -0,0 +1,157 @@
+diff -up screen-4.0.3/etc/etcscreenrc.screenrc screen-4.0.3/etc/etcscreenrc
+--- screen-4.0.3/etc/etcscreenrc.screenrc	2003-12-05 14:46:13.000000000 +0100
++++ screen-4.0.3/etc/etcscreenrc	2009-09-25 14:20:31.000000000 +0200
+@@ -36,8 +36,8 @@ vbell_msg "   Wuff  ----  Wuff!!  "
+ # IC    insert multiple chars
+ # nx    terminal uses xon/xoff
+ 
+-termcap  facit|vt100|xterm LP:G0
+-terminfo facit|vt100|xterm LP:G0
++termcap  facit|vt100|xterm|xterm-* LP:G0
++terminfo facit|vt100|xterm|xterm-* LP:G0
+ 
+ #the vt100 description does not mention "dl". *sigh*
+ termcap  vt100 dl=5\E[M
+@@ -55,15 +55,15 @@ terminfo sun 'up=^K:AL=\E[%p1%dL:DL=\E[%
+ #xterm understands both im/ic and doesn't have a status line.
+ #Note: Do not specify im and ic in the real termcap/info file as
+ #some programs (e.g. vi) will (no,no, may (jw)) not work anymore.
+-termcap  xterm|fptwist hs@:cs=\E[%i%d;%dr:im=\E[4h:ei=\E[4l
+-terminfo xterm|fptwist hs@:cs=\E[%i%p1%d;%p2%dr:im=\E[4h:ei=\E[4l
++#termcap  xterm|fptwist hs@:cs=\E[%i%d;%dr:im=\E[4h:ei=\E[4l
++#terminfo xterm|fptwist hs@:cs=\E[%i%p1%d;%p2%dr:im=\E[4h:ei=\E[4l
+ 
+ # Long time I had this in my private screenrc file. But many people
+ # seem to want it (jw):
+ # we do not want the width to change to 80 characters on startup:
+ # on suns, /etc/termcap has :is=\E[r\E[m\E[2J\E[H\E[?7h\E[?1;3;4;6l:
+-termcap xterm 'is=\E[r\E[m\E[2J\E[H\E[?7h\E[?1;4;6l'
+-terminfo xterm 'is=\E[r\E[m\E[2J\E[H\E[?7h\E[?1;4;6l'
++#termcap xterm 'is=\E[r\E[m\E[2J\E[H\E[?7h\E[?1;4;6l'
++#terminfo xterm 'is=\E[r\E[m\E[2J\E[H\E[?7h\E[?1;4;6l'
+ 
+ #
+ # Do not use xterms alternate window buffer. 
+diff -up screen-4.0.3/etc/screenrc.screenrc screen-4.0.3/etc/screenrc
+--- screen-4.0.3/etc/screenrc.screenrc	2006-10-23 15:06:32.000000000 +0200
++++ screen-4.0.3/etc/screenrc	2009-09-25 14:31:30.000000000 +0200
+@@ -1,21 +1,11 @@
+-#
+-# Example of a user's .screenrc file
+-#
+-
+ # This is how one can set a reattach password:
+ # password ODSJQf.4IJN7E    # "1234"
+ 
+-# no annoying audible bell, please
+-vbell on
+-
+-# detach on hangup
+-autodetach on
+-
+ # don't display the copyright page
+ startup_message off
+ 
+ # emulate .logout message
+-pow_detach_msg "Screen session of \$LOGNAME \$:cr:\$:nl:ended."
++pow_detach_msg "Screen session of $LOGNAME $:cr:$:nl:ended."
+ 
+ # advertise hardstatus support to $TERMCAP
+ # termcapinfo  * '' 'hs:ts=\E_:fs=\E\\:ds=\E_\E\\'
+@@ -40,18 +30,12 @@ defscrollback 1000
+ 
+ ################
+ #
+-# xterm tweaks
++# more xterm tweaks
+ #
+ 
+-#xterm understands both im/ic and doesn't have a status line.
+-#Note: Do not specify im and ic in the real termcap/info file as
+-#some programs (e.g. vi) will not work anymore.
+-termcap  xterm hs@:cs=\E[%i%d;%dr:im=\E[4h:ei=\E[4l
+-terminfo xterm hs@:cs=\E[%i%p1%d;%p2%dr:im=\E[4h:ei=\E[4l
+-
+ #80/132 column switching must be enabled for ^AW to work
+ #change init sequence to not switch width
+-termcapinfo  xterm Z0=\E[?3h:Z1=\E[?3l:is=\E[r\E[m\E[2J\E[H\E[?7h\E[?1;4;6l
++#termcapinfo  xterm Z0=\E[?3h:Z1=\E[?3l:is=\E[r\E[m\E[2J\E[H\E[?7h\E[?1;4;6l
+ 
+ # Make the output buffer large for (fast) xterms.
+ #termcapinfo xterm* OL=10000
+@@ -59,18 +43,18 @@ termcapinfo xterm* OL=100
+ 
+ # tell screen that xterm can switch to dark background and has function
+ # keys.
+-termcapinfo xterm 'VR=\E[?5h:VN=\E[?5l'
+-termcapinfo xterm 'k1=\E[11~:k2=\E[12~:k3=\E[13~:k4=\E[14~'
+-termcapinfo xterm 'kh=\EOH:kI=\E[2~:kD=\E[3~:kH=\EOF:kP=\E[5~:kN=\E[6~'
++termcapinfo xterm|xterm-* 'VR=\E[?5h:VN=\E[?5l'
++#termcapinfo xterm 'k1=\E[11~:k2=\E[12~:k3=\E[13~:k4=\E[14~'
++#termcapinfo xterm 'kh=\EOH:kI=\E[2~:kD=\E[3~:kH=\EOF:kP=\E[5~:kN=\E[6~'
+ 
+ # special xterm hardstatus: use the window title.
+-termcapinfo xterm 'hs:ts=\E]2;:fs=\007:ds=\E]2;screen\007'
++termcapinfo xterm|xterm-* 'hs:ts=\E]2;:fs=\007:ds=\E]2;screen\007'
+ 
+ #terminfo xterm 'vb=\E[?5h$<200/>\E[?5l'
+-termcapinfo xterm 'vi=\E[?25l:ve=\E[34h\E[?25h:vs=\E[34l'
++#termcapinfo xterm 'vi=\E[?25l:ve=\E[34h\E[?25h:vs=\E[34l'
+ 
+ # emulate part of the 'K' charset
+-termcapinfo   xterm 'XC=K%,%\E(B,[\304,\\\\\326,]\334,{\344,|\366,}\374,~\337'
++termcapinfo   xterm|xterm-* 'XC=K%,%\E(B,[\304,\\\\\326,]\334,{\344,|\366,}\374,~\337'
+ 
+ # xterm-52 tweaks:
+ # - uses background color for delete operations
+@@ -103,32 +87,12 @@ termcapinfo linux C8
+ # old rxvt versions also need this
+ # termcapinfo rxvt C8
+ 
+-
+-################
+-#
+-# keybindings
+-#
+-
+-#remove some stupid / dangerous key bindings
+-bind k
+-bind ^k
+-bind .
+-bind ^\
+-bind \\
+-bind ^h
+-bind h
+-#make them better
+-bind 'K' kill
+-bind 'I' login on
+-bind 'O' login off
+-bind '}' history
+-
+ # Yet another hack:
+ # Prepend/append register [/] to the paste if ^a^] is pressed.
+ # This lets me have autoindent mode in vi.
+-register [ "\033:se noai\015a"
+-register ] "\033:se ai\015a"
+-bind ^] paste [.]
++#register [ "\033:se noai\015a"
++#register ] "\033:se ai\015a"
++#bind ^] paste [.]
+ 
+ ################
+ #
+@@ -140,9 +104,14 @@ bind ^] paste [.]
+ # screen -t 40 2 rlogin server
+ 
+ # caption always "%3n %t%? @%u%?%? [%h]%?%=%c"
++## alternative caption, gives window list, LOGNAME and current date:
++# caption always "%{wk}%?%-Lw%?%{bw}%n*%f %t%?(%u)%?%{wk}%?%+Lw %=%{mk}@%H %{yk}%D %{ck}%M%{wk} %{ck}%d %{gk}%c"
+ # hardstatus alwaysignore
+ # hardstatus alwayslastline "%Lw"
+ 
++# Red Hat's normal status line
++hardstatus string "[screen %n%?: %t%?] %h"
++
+ # bind = resize =
+ # bind + resize +1
+ # bind - resize -1
diff --git a/screen-4.3.1-suppress_remap.patch b/screen-4.3.1-suppress_remap.patch
new file mode 100644
index 0000000000000000000000000000000000000000..85109a2ef1047ab1a58581c28f164af1764eb1b6
--- /dev/null
+++ b/screen-4.3.1-suppress_remap.patch
@@ -0,0 +1,13 @@
+Author: Loic Minier <lool@dooz.org>
+Description: Unbreak several useful keybindings.
+--- a/termcap.c
++++ b/termcap.c
+@@ -552,8 +552,6 @@
+       else
+ 	break;
+     }
+-  if (n < KMAP_KEYS)
+-    domap = 1;
+   if (map == 0 && domap)
+     return 0;
+   if (map && !domap)
diff --git a/screen-E3.patch b/screen-E3.patch
new file mode 100644
index 0000000000000000000000000000000000000000..31fb2be28b2baf4d13714425bb7d9ca1858f79ee
--- /dev/null
+++ b/screen-E3.patch
@@ -0,0 +1,51 @@
+diff --git a/display.c b/display.c
+index b11b18b..180f19c 100644
+--- a/display.c
++++ b/display.c
+@@ -3818,4 +3818,10 @@ char **cmdv;
+ 
+ #endif /* BLANKER_PRG */
+ 
++void
++ClearScrollbackBuffer()
++{
++  if (D_CE3)
++    AddCStr(D_CE3);
++}
+ 
+diff --git a/extern.h b/extern.h
+index 7966008..e1ec242 100644
+--- a/extern.h
++++ b/extern.h
+@@ -316,6 +316,7 @@ extern int   color256to88 __P((int));
+ extern void  ResetIdle __P((void));
+ extern void  KillBlanker __P((void));
+ extern void  DisplaySleep1000 __P((int, int));
++extern void  ClearScrollbackBuffer __P((void));
+ 
+ /* resize.c */
+ extern int   ChangeWindowSize __P((struct win *, int, int, int));
+diff --git a/screen.c b/screen.c
+index 64650e9..c68d949 100644
+--- a/screen.c
++++ b/screen.c
+@@ -1958,6 +1958,7 @@ void Detach(int mode)
+ 
+     case D_LOCK:
+       ClearAll();
++      ClearScrollbackBuffer();
+       sign = SIG_LOCK;
+       /* tell attacher to lock terminal with a lockprg. */
+       break;
+diff --git a/term.c b/term.c
+index c92d85a..a6e9200 100644
+--- a/term.c
++++ b/term.c
+@@ -83,6 +83,7 @@ struct term term[T_N] =
+   { "CD", T_STR  },
+   { "ce", T_STR  },
+   { "cb", T_STR  },
++  { "E3", T_STR  },
+ 
+ /* initialise */
+   { "is", T_STR  },
diff --git a/screen.spec b/screen.spec
index 5c7403d8a8c059175e55c5c1c11ac3899efa5399..95508b07e2eb85aee37d66239172ac8e26927120 100644
--- a/screen.spec
+++ b/screen.spec
@@ -1,13 +1,18 @@
 Name:           screen
 Epoch:          1
 Version:        4.6.2
-Release:        5
+Release:        6
 Summary:        A full-screen window manager
 License:        GPLv3+
 URL:            http://www.gnu.org/software/screen
 Source0:        http://ftp.gnu.org/gnu/screen/screen-%{version}.tar.gz
 Source1:        screen.pam
 
+Patch0:         screen-4.3.1-screenrc.patch
+Patch1:         screen-E3.patch
+Patch2:         screen-4.3.1-suppress_remap.patch
+Patch3:         screen-4.3.1-crypt.patch
+
 BuildRequires:  automake autoconf gcc ncurses-devel texinfo
 Requires:       shadow-utils
 Requires(preun): info
@@ -26,7 +31,7 @@ BuildArch:   noarch
 %{summary}.
 
 %prep
-%autosetup -n %{name}-%{version}
+%autosetup -n %{name}-%{version} -p1
 
 %build
 autoreconf -fiv
@@ -92,6 +97,12 @@ fi
 %{_infodir}/screen.info*
 
 %changelog
+* Wed Mar 18 2020 openEuler Buildteam <buildteam@openeuler.org> - 1:4.6.2-6
+- Type:bugfix
+- ID:NA
+- SUG:NA
+- DESC:fix Null pointer reference
+
 * Sat Dec 21 2019 openEuler Buildteam <buildteam@openeuler.org> - 1:4.6.2-5
 - Type:enhancement
 - ID:NA