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gnu: ncurses: Fix CVE-2017-10684 and CVE-2017-10685.
* gnu/packages/patches/ncurses-CVE-2017-10684-10685.patch: New file. * gnu/local.mk (dist_patch_DATA): Add it. * gnu/packages/ncurses.scm (ncurses)[replacement]: New field. (ncurses/fixed): New variable.
This commit is contained in:
Leo Famulari
parent
ef019092b9
commit
625e7cd654
3 changed files with 214 additions and 1 deletions
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@ -845,6 +845,7 @@ dist_patch_DATA = \
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%D%/packages/patches/mupen64plus-ui-console-notice.patch \
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%D%/packages/patches/musl-CVE-2016-8859.patch \
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%D%/packages/patches/mutt-store-references.patch \
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%D%/packages/patches/ncurses-CVE-2017-10684-10685.patch \
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%D%/packages/patches/net-tools-bitrot.patch \
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%D%/packages/patches/netcdf-date-time.patch \
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%D%/packages/patches/netcdf-tst_h_par.patch \
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@ -1,7 +1,7 @@
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;;; GNU Guix --- Functional package management for GNU
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;;; Copyright © 2012, 2013, 2014, 2015 Ludovic Courtès <ludo@gnu.org>
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;;; Copyright © 2014, 2016 Mark H Weaver <mhw@netris.org>
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;;; Copyright © 2015 Leo Famulari <leo@famulari.name>
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;;; Copyright © 2015, 2017 Leo Famulari <leo@famulari.name>
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;;; Copyright © 2016 ng0 <ng0@we.make.ritual.n0.is>
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;;; Copyright © 2016 Efraim Flashner <efraim@flashner.co.il>
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;;; Copyright © 2016 Jan Nieuwenhuizen <janneke@gnu.org>
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@ -37,6 +37,7 @@ (define-module (gnu packages ncurses)
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(define-public ncurses
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(package
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(name "ncurses")
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(replacement ncurses/fixed)
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(version "6.0")
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(source (origin
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(method url-fetch)
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@ -188,6 +189,17 @@ (define package.pc
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(license x11)
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(home-page "https://www.gnu.org/software/ncurses/")))
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(define ncurses/fixed
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(package
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(inherit ncurses)
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(source
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(origin
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(inherit (package-source ncurses))
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(patches
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(append
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(origin-patches (package-source ncurses))
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(search-patches "ncurses-CVE-2017-10684-10685.patch")))))))
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(define-public dialog
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(package
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(name "dialog")
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200
gnu/packages/patches/ncurses-CVE-2017-10684-10685.patch
Normal file
200
gnu/packages/patches/ncurses-CVE-2017-10684-10685.patch
Normal file
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@ -0,0 +1,200 @@
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Fix CVE-2017-10684 and CVE-2017-10685:
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-10684
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-10685
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Bug reports included proof of concept reproducer inputs:
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https://bugzilla.redhat.com/show_bug.cgi?id=1464684
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https://bugzilla.redhat.com/show_bug.cgi?id=1464685
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https://bugzilla.redhat.com/show_bug.cgi?id=1464686
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https://bugzilla.redhat.com/show_bug.cgi?id=1464687
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https://bugzilla.redhat.com/show_bug.cgi?id=1464688
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https://bugzilla.redhat.com/show_bug.cgi?id=1464691
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https://bugzilla.redhat.com/show_bug.cgi?id=1464692
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Patches copied from ncurses patch release 20170701:
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ftp://invisible-island.net/ncurses/6.0/ncurses-6.0-20170701.patch.gz
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Excerpt from patch release announcement:
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+ add/improve checks in tic's parser to address invalid input
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(Redhat #1464684, #1464685, #1464686, #1464691).
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+ alloc_entry.c, add a check for a null-pointer.
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+ parse_entry.c, add several checks for valid pointers as well as
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one check to ensure that a single character on a line is not
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treated as the 2-character termcap short-name.
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+ the fixes for Redhat #1464685 obscured a problem subsequently
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reported in Redhat #1464687; the given test-case was no longer
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reproducible. Testing without the fixes for the earlier reports
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showed a problem with buffer overflow in dump_entry.c, which is
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addressed by reducing the use of a fixed-size buffer.
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https://lists.gnu.org/archive/html/bug-ncurses/2017-07/msg00001.html
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--- ncurses-6.0-20170624+/ncurses/tinfo/alloc_entry.c 2017-04-09 23:33:51.000000000 +0000
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+++ ncurses-6.0-20170701/ncurses/tinfo/alloc_entry.c 2017-06-27 23:48:55.000000000 +0000
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@@ -96,7 +96,11 @@
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{
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char *result = 0;
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size_t old_next_free = next_free;
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- size_t len = strlen(string) + 1;
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+ size_t len;
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+
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+ if (string == 0)
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+ return _nc_save_str("");
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+ len = strlen(string) + 1;
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if (len == 1 && next_free != 0) {
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/*
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--- ncurses-6.0-20170624+/ncurses/tinfo/parse_entry.c 2017-06-24 22:59:46.000000000 +0000
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+++ ncurses-6.0-20170701/ncurses/tinfo/parse_entry.c 2017-06-28 00:53:12.000000000 +0000
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@@ -236,13 +236,14 @@
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* implemented it. Note that the resulting terminal type was never the
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* 2-character name, but was instead the first alias after that.
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*/
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+#define ok_TC2(s) (isgraph(UChar(s)) && (s) != '|')
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ptr = _nc_curr_token.tk_name;
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if (_nc_syntax == SYN_TERMCAP
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#if NCURSES_XNAMES
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&& !_nc_user_definable
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#endif
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) {
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- if (ptr[2] == '|') {
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+ if (ok_TC2(ptr[0]) && ok_TC2(ptr[1]) && (ptr[2] == '|')) {
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ptr += 3;
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_nc_curr_token.tk_name[2] = '\0';
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}
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@@ -284,9 +285,11 @@
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if (is_use || is_tc) {
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entryp->uses[entryp->nuses].name = _nc_save_str(_nc_curr_token.tk_valstring);
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entryp->uses[entryp->nuses].line = _nc_curr_line;
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- entryp->nuses++;
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- if (entryp->nuses > 1 && is_tc) {
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- BAD_TC_USAGE
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+ if (VALID_STRING(entryp->uses[entryp->nuses].name)) {
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+ entryp->nuses++;
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+ if (entryp->nuses > 1 && is_tc) {
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+ BAD_TC_USAGE
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+ }
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}
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} else {
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/* normal token lookup */
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@@ -588,7 +591,7 @@
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static void
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append_acs(string_desc * dst, int code, char *src)
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{
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- if (src != 0 && strlen(src) == 1) {
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+ if (VALID_STRING(src) && strlen(src) == 1) {
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append_acs0(dst, code, *src);
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}
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}
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@@ -849,15 +852,14 @@
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}
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if (tp->Strings[to_ptr->nte_index]) {
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+ const char *s = tp->Strings[from_ptr->nte_index];
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+ const char *t = tp->Strings[to_ptr->nte_index];
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/* There's no point in warning about it if it's the same
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* string; that's just an inefficiency.
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*/
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- if (strcmp(
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- tp->Strings[from_ptr->nte_index],
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- tp->Strings[to_ptr->nte_index]) != 0)
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+ if (VALID_STRING(s) && VALID_STRING(t) && strcmp(s, t) != 0)
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_nc_warning("%s (%s) already has an explicit value %s, ignoring ko",
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- ap->to, ap->from,
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- _nc_visbuf(tp->Strings[to_ptr->nte_index]));
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+ ap->to, ap->from, t);
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continue;
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}
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--- ncurses-6.0-20170624+/progs/dump_entry.c 2017-06-23 22:47:43.000000000 +0000
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+++ ncurses-6.0-20170701/progs/dump_entry.c 2017-07-01 11:27:29.000000000 +0000
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@@ -841,9 +841,10 @@
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PredIdx num_strings = 0;
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bool outcount = 0;
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-#define WRAP_CONCAT \
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- wrap_concat(buffer); \
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- outcount = TRUE
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+#define WRAP_CONCAT1(s) wrap_concat(s); outcount = TRUE
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+#define WRAP_CONCAT2(a,b) wrap_concat(a); WRAP_CONCAT1(b)
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+#define WRAP_CONCAT3(a,b,c) wrap_concat(a); WRAP_CONCAT2(b,c)
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+#define WRAP_CONCAT WRAP_CONCAT1(buffer)
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len = 12; /* terminfo file-header */
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@@ -1007,9 +1008,9 @@
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set_attributes = save_sgr;
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trimmed_sgr0 = _nc_trim_sgr0(tterm);
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- if (strcmp(capability, trimmed_sgr0))
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+ if (strcmp(capability, trimmed_sgr0)) {
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capability = trimmed_sgr0;
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- else {
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+ } else {
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if (trimmed_sgr0 != exit_attribute_mode)
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free(trimmed_sgr0);
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}
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@@ -1046,13 +1047,21 @@
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_nc_SPRINTF(buffer, _nc_SLIMIT(sizeof(buffer))
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"%s=!!! %s WILL NOT CONVERT !!!",
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name, srccap);
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+ WRAP_CONCAT;
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} else if (suppress_untranslatable) {
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continue;
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} else {
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char *s = srccap, *d = buffer;
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- _nc_SPRINTF(d, _nc_SLIMIT(sizeof(buffer)) "..%s=", name);
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- d += strlen(d);
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+ WRAP_CONCAT3("..", name, "=");
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while ((*d = *s++) != 0) {
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+ if ((d - buffer - 1) >= (int) sizeof(buffer)) {
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+ fprintf(stderr,
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+ "%s: value for %s is too long\n",
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+ _nc_progname,
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+ name);
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+ *d = '\0';
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+ break;
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+ }
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if (*d == ':') {
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*d++ = '\\';
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*d = ':';
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@@ -1061,13 +1070,12 @@
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}
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d++;
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}
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+ WRAP_CONCAT;
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}
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} else {
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- _nc_SPRINTF(buffer, _nc_SLIMIT(sizeof(buffer))
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- "%s=%s", name, cv);
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+ WRAP_CONCAT3(name, "=", cv);
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}
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len += (int) strlen(capability) + 1;
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- WRAP_CONCAT;
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} else {
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char *src = _nc_tic_expand(capability,
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outform == F_TERMINFO, numbers);
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@@ -1083,8 +1091,7 @@
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strcpy_DYN(&tmpbuf, src);
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}
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len += (int) strlen(capability) + 1;
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- wrap_concat(tmpbuf.text);
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- outcount = TRUE;
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+ WRAP_CONCAT1(tmpbuf.text);
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}
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}
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/* e.g., trimmed_sgr0 */
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@@ -1526,7 +1533,8 @@
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}
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if (len > critlen) {
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(void) fprintf(stderr,
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- "warning: %s entry is %d bytes long\n",
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+ "%s: %s entry is %d bytes long\n",
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+ _nc_progname,
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_nc_first_name(tterm->term_names),
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len);
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SHOW_WHY("# WARNING: this entry, %d bytes long, may core-dump %s libraries!\n",
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