fix CVE-2021-39537

backport-CVE-2021-39537-add-check-for-end-of-string-in-cvtchar-to-handle-a-malformed.patch

@@ -0,0 +1,46 @@
+From 790a85dbd4a81d5f5d8dd02a44d84f01512ef443 Mon Sep 17 00:00:00 2001
+From: "Thomas E. Dickey" <dickey@invisible-island.net>
+Date: Mon, 1 Jun 2020 00:02:30 +0000
+Subject: [PATCH] ncurses 6.2 - patch 20200531
+
++ correct configure version-check/warnng for g++ to allow for 10.x
++ re-enable "bel" in konsole-base (report by Nia Huang)
++ add linux-s entry (patch by Alexandre Montaron).
++ drop long-obsolete convert_configure.pl
++ add test/test_parm.c, for checking tparm changes.
++ improve parameter-checking for tparm, adding function _nc_tiparm() to
+  handle the most-used case, which accepts only numeric parameters
+  (report/testcase by "puppet-meteor").
++ use a more conservative estimate of the buffer-size in lib_tparm.c's
+  save_text() and save_number(), in case the sprintf() function
+  passes-through unexpected characters from a format specifier
+  (report/testcase by "puppet-meteor").
++ add a check for end-of-string in cvtchar to handle a malformed
+  string in infotocap (report/testcase by "puppet-meteor").
+---
+ ncurses/tinfo/captoinfo.c | 9 ++++++---
+ 1 file changed, 6 insertions(+), 3 deletions(-)
+
+diff --git a/ncurses/tinfo/captoinfo.c b/ncurses/tinfo/captoinfo.c
+index 8b3b83d..f0b8c31 100644
+--- a/ncurses/tinfo/captoinfo.c
++++ b/ncurses/tinfo/captoinfo.c
+@@ -216,12 +216,15 @@ cvtchar(register const char *sp)
+ 	}
+ 	break;
+     case '^':
++       len = 2;
+ 	c = UChar(*++sp);
+-	if (c == '?')
++	if (c == '?') {
+ 	    c = 127;
+-	else
++	} else if (c == '\0') {
++           len = 1;
++       } else {
+ 	    c &= 0x1f;
+-	len = 2;
++       }
+ 	break;
+     default:
+ 	c = UChar(*sp);

ncurses.spec

@@ -1,7 +1,7 @@
 %global revision 20200411
 Name:          ncurses
 Version:       6.2
-Release:       1
+Release:       2
 Summary:       Terminal control library
 License:       MIT
 URL:           https://invisible-island.net/ncurses/ncurses.html
@@ -12,6 +12,8 @@ Patch9:        ncurses-libs.patch
 Patch11:       ncurses-urxvt.patch
 Patch12:       ncurses-kbs.patch
 
+Patch6000:     backport-CVE-2021-39537-add-check-for-end-of-string-in-cvtchar-to-handle-a-malformed.patch
+
 BuildRequires: gcc gcc-c++ gpm-devel pkgconfig
 
 Requires:      %{name}-base = %{version}-%{release}
@@ -221,6 +223,12 @@ xz NEWS
 %{_mandir}/man7/*
 
 %changelog
+* Tue Oct 12 2021 xihaochen<xihaochen@huawei.com> - 6.2-2
+- Type:CVE
+- CVE:CVE-2021-39537
+- SUG:NA
+- DESC:fix CVE-2021-39537
+
 * Thu Apr 16 2020 huzunhao <huzunhao2@huawei.com> - 6.2-1
 - Type:bugfix
 - Id:NA