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e716093bf4
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50334b4e70
@ -1,43 +0,0 @@
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From 6df4a48ff6b31bedc2d0216b84dbe66cf9ca5e23 Mon Sep 17 00:00:00 2001
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From: Alexander Naumov <alexander_naumov@opensuse.org>
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Date: Wed, 1 Feb 2023 13:47:57 +0200
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Subject: [PATCH] Missing signal sending permission check on failed query
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messages
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When run as setuid root, one can send a query message to the
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privileged screen process via its unix socket in order to force
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it to send SIGHUP to a PID that can be freely specified in the
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query packet.
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Processes that do not explicitly handle SIGHUP will simply terminate
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Signed-off-by: Alexander Naumov <alexander_naumov@opensuse.org>
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---
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socket.c | 9 +++++++--
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1 file changed, 7 insertions(+), 2 deletions(-)
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diff --git a/socket.c b/socket.c
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index bb68b35..0a575cf 100644
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--- a/socket.c
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+++ b/socket.c
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@@ -1285,11 +1285,16 @@ ReceiveMsg()
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else
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queryflag = -1;
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- Kill(m.m.command.apid,
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+ if (CheckPid(m.m.command.apid)) {
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+ Msg(0, "Query attempt with bad pid(%d)!", m.m.command.apid);
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+ }
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+ else {
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+ Kill(m.m.command.apid,
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(queryflag >= 0)
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? SIGCONT
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: SIG_BYE); /* Send SIG_BYE if an error happened */
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- queryflag = -1;
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+ queryflag = -1;
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+ }
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}
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break;
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case MSG_COMMAND:
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--
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2.27.0
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BIN
screen-4.8.0.tar.gz
Normal file
BIN
screen-4.8.0.tar.gz
Normal file
Binary file not shown.
Binary file not shown.
41
screen.spec
41
screen.spec
@ -1,22 +1,19 @@
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Name: screen
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Name: screen
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Epoch: 1
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Epoch: 1
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Version: 4.9.0
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Version: 4.8.0
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Release: 2
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Release: 8
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Summary: A full-screen window manager
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Summary: A full-screen window manager
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License: GPLv3+
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License: GPLv3+
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URL: http://www.gnu.org/software/screen
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URL: http://www.gnu.org/software/screen
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Source0: http://ftp.gnu.org/gnu/screen/screen-%{version}.tar.gz
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Source0: http://ftp.gnu.org/gnu/screen/screen-%{version}.tar.gz
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Source1: screen.pam
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Source1: screen.pam
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Patch1: screen-4.3.1-screenrc.patch
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Patch0: screen-4.3.1-screenrc.patch
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Patch2: screen-E3.patch
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Patch1: screen-E3.patch
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Patch3: screen-4.3.1-suppress_remap.patch
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Patch2: screen-4.3.1-suppress_remap.patch
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Patch4: screen-4.3.1-crypt.patch
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Patch3: screen-4.3.1-crypt.patch
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Patch6001: backport-CVE-2023-24626.patch
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BuildRequires: automake autoconf gcc ncurses-devel texinfo
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BuildRequires: automake autoconf gcc ncurses-devel texinfo
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BuildRequires: systemd
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Requires: shadow-utils
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Requires: shadow-utils
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Requires(preun): info
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Requires(preun): info
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Requires(post): info
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Requires(post): info
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@ -44,6 +41,7 @@ autoreconf -fiv
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--enable-colors256 \
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--enable-colors256 \
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--enable-rxvt_osc \
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--enable-rxvt_osc \
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--enable-use-locale \
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--enable-use-locale \
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--enable-telnet \
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--with-pty-mode=0620 \
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--with-pty-mode=0620 \
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--with-sys-screenrc="%{_sysconfdir}/screenrc" \
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--with-sys-screenrc="%{_sysconfdir}/screenrc" \
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--with-socket-dir="%{_rundir}/screen"
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--with-socket-dir="%{_rundir}/screen"
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@ -99,32 +97,13 @@ fi
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%{_infodir}/screen.info*
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%{_infodir}/screen.info*
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%changelog
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%changelog
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* Wed Apr 19 2023 hongjinghao <hongjinghao@huawei.com> - 1:4.9.0-2
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- fix CVE-2023-24626
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* Fri Oct 21 2022 hongjinghao <hongjinghao@huawei.com> - 1:4.9.0-1
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- update to 4.9.0
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* Sat Jun 19 2021 panxiaohe <panxiaohe@huawei.com> - 1:4.8.0-11
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- remove '--enable-telnet' in configure
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* Fri Jun 4 2021 panxiaohe <panxiaohe@huawei.com> - 1:4.8.0-10
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- add systemd to BuildRequires to use _tmpfilesdir macro
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- fix bogus dates in changelog
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* Fri Feb 26 2021 lirui<lirui130@huawei.com> - 1:4.8.0-9
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- Type:bugfix
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- ID:NA
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- SUG:NA
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- DESC:fix CVE-2021-26937
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* Mon Jul 27 2020 linwei<linwei54@huawei.com> - 1:4.8.0-8
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* Mon Jul 27 2020 linwei<linwei54@huawei.com> - 1:4.8.0-8
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- Type:bugfix
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- Type:bugfix
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- ID:NA
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- ID:NA
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- SUG:NA
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- SUG:NA
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- DESC:modify release and changelog
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- DESC:modify release and changelog
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* Thu Jul 16 2020 linwei<linwei54@huawei.com> - 1:4.8.0-7
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* Tue Jul 16 2020 linwei<linwei54@huawei.com> - 1:4.8.0-7
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- Type:enhancement
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- Type:enhancement
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- ID:NA
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- ID:NA
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- SUG:NA
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- SUG:NA
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@ -148,10 +127,10 @@ fi
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- SUG:NA
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- SUG:NA
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- DESC:add build requires of texinfo to solve the problem of build
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- DESC:add build requires of texinfo to solve the problem of build
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* Thu Sep 26 2019 openEuler Buildteam <buildteam@openeuler.org> - 1:4.6.2-3
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* Tue Sep 26 2019 openEuler Buildteam <buildteam@openeuler.org> - 1:4.6.2-3
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- Modify requires
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- Modify requires
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* Thu Sep 26 2019 openEuler Buildteam <buildteam@openeuler.org> - 1:4.6.2-2
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* Tue Sep 26 2019 openEuler Buildteam <buildteam@openeuler.org> - 1:4.6.2-2
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- Adjust requires
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- Adjust requires
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* Sat Sep 7 2019 openEuler Buildteam <buildteam@openeuler.org> - 1:4.6.2-1
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* Sat Sep 7 2019 openEuler Buildteam <buildteam@openeuler.org> - 1:4.6.2-1
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