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55
CVE-2021-33641.patch
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55
CVE-2021-33641.patch
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@ -0,0 +1,55 @@
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From 162549f599c4460bcefc1526cfa014fec626ebc5 Mon Sep 17 00:00:00 2001
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From: zhoupengcheng <zhoupengcheng11@huawei.com>
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Date: Sat, 26 Nov 2022 18:27:48 +0800
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Subject: [PATCH] fix CVE-2021-33641
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the global variable:cptr use-after-free in more_curly(),
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save original line in more_curly() in case get new line to fix
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CVE-2021-33641.
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---
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reader.c | 19 +++++++++++++++++--
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1 file changed, 17 insertions(+), 2 deletions(-)
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diff --git a/reader.c b/reader.c
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index 37dc2cb..2a1dfe5 100644
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--- a/reader.c
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+++ b/reader.c
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@@ -1027,9 +1027,16 @@ trim_blanks(char *buffer)
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static int
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more_curly(void)
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{
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- char *save = cptr;
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+
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int result = 0;
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int finish = 0;
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+ FILE *f = input_file;
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+ long int old_pos = ftell(f);
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+ int save_linesize = linesize;
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+ char *save_line = TMALLOC(char, linesize);
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+ NO_SPACE(save_line);
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+ char *save_cptr = save_line + (cptr - line);
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+ memcpy(save_line, line, linesize);
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do
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{
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switch (next_inline())
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@@ -1046,7 +1053,15 @@ more_curly(void)
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++cptr;
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}
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while (!finish);
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- cptr = save;
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+
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+ // in case of next_inline malloc new line space
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+ free(line);
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+ cptr = save_cptr;
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+ line = save_line;
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+ linesize = save_linesize;
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+ // Since get_line also move the postion in file forward
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+ // we need to move it back
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+ fseek(f, old_pos, SEEK_SET);
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return result;
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}
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--
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2.27.0
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44
CVE-2021-33642.patch
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44
CVE-2021-33642.patch
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@ -0,0 +1,44 @@
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From ab5ee87cbbe1b94a45d5c7974b321e2ee78d1238 Mon Sep 17 00:00:00 2001
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From: zhoupengcheng <zhoupengcheng11@huawei.com>
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Date: Sat, 26 Nov 2022 18:27:48 +0800
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Subject: [PATCH] fix CVE-2021-33642
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next_inline() return EOF cause infinite loop in more_curly(),
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Add EOF case in more_curly(), don't allow multiple line.
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---
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reader.c | 10 +++++++++-
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1 file changed, 9 insertions(+), 1 deletion(-)
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diff --git a/reader.c b/reader.c
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index 2a1dfe5..6a9bb7c 100644
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--- a/reader.c
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+++ b/reader.c
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@@ -1030,8 +1030,10 @@ more_curly(void)
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int result = 0;
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int finish = 0;
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+ int c;
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FILE *f = input_file;
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long int old_pos = ftell(f);
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+ long int new_pos = old_pos;
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int save_linesize = linesize;
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char *save_line = TMALLOC(char, linesize);
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NO_SPACE(save_line);
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@@ -1039,7 +1041,13 @@ more_curly(void)
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memcpy(save_line, line, linesize);
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do
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{
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- switch (next_inline())
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+ c = next_inline();
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+ // Don't allow multiple line, so we use file position to check
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+ // Only get_line() will move file postion forward
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+ new_pos = ftell(f);
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+ if (c == (EOF) || old_pos != new_pos)
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+ break;
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+ switch (c)
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{
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case 0:
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case '\n':
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--
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2.27.0
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Binary file not shown.
BIN
byacc-20230219.tgz
Normal file
BIN
byacc-20230219.tgz
Normal file
Binary file not shown.
30
byacc.spec
30
byacc.spec
@ -1,4 +1,4 @@
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%define byaccdate 20210808
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%define byaccdate 20230219
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Name: byacc
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Version: 2.0.%{byaccdate}
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@ -6,7 +6,10 @@ Release: 1
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Summary: A parser generator
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License: public domain
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URL: https://invisible-island.net/byacc/byacc.html
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Source0: https://invisible-island.net/datafiles/release/byacc-%{byaccdate}.tgz
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Source0: https://invisible-mirror.net/archives/byacc/byacc-%{byaccdate}.tgz
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Patch9000: CVE-2021-33641.patch
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Patch9001: CVE-2021-33642.patch
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BuildRequires: gcc
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@ -20,7 +23,7 @@ rejected.
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%package_help
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%prep
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%autosetup -n byacc-20210808 -p1
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%autosetup -n byacc-%{byaccdate} -p1
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find . -type f -name \*.c -print0 | xargs -0 sed -i 's/YYSTACKSIZE 500/YYSTACKSIZE 10000/g'
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%build
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@ -33,10 +36,10 @@ ln -s yacc %{buildroot}%{_bindir}/byacc
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ln -s yacc.1 %{buildroot}%{_mandir}/man1/byacc.1
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%check
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#make check
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%make_build check
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%files
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%doc ACKNOWLEDGEMENTS README* NO_WARRANTY
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%doc ACKNOWLEDGEMENTS NEW_FEATURES NO_WARRANTY README
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%license AUTHORS
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%{_bindir}/*
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@ -45,13 +48,28 @@ ln -s yacc.1 %{buildroot}%{_mandir}/man1/byacc.1
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%{_mandir}/man1/*
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%changelog
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* Fri Jun 16 2023 chenchen <chen_aka_jan@163.com> - 2.0.20230219-1
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- Upgrade to version 2.0.20230219
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* Mon Dec 26 2022 zhoupengcheng <zhoupengcheng11@huawei.com> - 2.0.20210808-5
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- fix CVE-2021-33641 and CVE-2021-33642
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* Sat Dec 24 2022 chenmaodong <chenmaodong@xfusion.com> - 2.0.20210808-4
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- Modify changelog error
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* Mon Nov 21 2022 yaoxin <yaoxin30@h-partners.com> - 2.0.20210808-3
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- Modify invalid Source
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* Wed Jun 29 2022 wangjiang <wangjiang37@h-partners.com> - 2.0.20210808-2
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- DESC:enable check test suite
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* Sat Dec 25 2021 tianwei<tianwei12@huawei.com> - 2.0.20210808
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- DESC:upgrade to 2.0.20210808
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* Mon Feb 1 2021 wangjie<wangjie294@huawei.com> - 2.0.20210109
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- DESC:upgrade 2.0.20210109
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* Sta Jul 25 2020 xinghe <xinghe1@huawei.com> - 1.9.20200330-1
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* Sat Jul 25 2020 xinghe <xinghe1@huawei.com> - 1.9.20200330-1
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- update version to 1.9.20200330
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* Wed Jan 22 2020 gulining<gulining1@huawei.com> - 1.9.20170709-9
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