diff options
Diffstat (limited to 'meta/recipes-core/systemd/systemd/CVE-2023-26604-1.patch')
| -rw-r--r-- | meta/recipes-core/systemd/systemd/CVE-2023-26604-1.patch | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/meta/recipes-core/systemd/systemd/CVE-2023-26604-1.patch b/meta/recipes-core/systemd/systemd/CVE-2023-26604-1.patch new file mode 100644 index 0000000000..39f9480cf8 --- /dev/null +++ b/meta/recipes-core/systemd/systemd/CVE-2023-26604-1.patch @@ -0,0 +1,115 @@ +From 612ebf6c913dd0e4197c44909cb3157f5c51a2f0 Mon Sep 17 00:00:00 2001 +From: Lennart Poettering <lennart@poettering.net> +Date: Mon, 31 Aug 2020 19:37:13 +0200 +Subject: [PATCH] pager: set $LESSSECURE whenver we invoke a pager + +Some extra safety when invoked via "sudo". With this we address a +genuine design flaw of sudo, and we shouldn't need to deal with this. +But it's still a good idea to disable this surface given how exotic it +is. + +Prompted by #5666 + +CVE: CVE-2023-26604 +Upstream-Status: Backport [https://github.com/systemd/systemd/pull/17270/commits/612ebf6c913dd0e4197c44909cb3157f5c51a2f0] +Comments: Hunk not refreshed +Signed-off-by: rajmohan r <rajmohan.r@kpit.com> +--- + man/less-variables.xml | 9 +++++++++ + man/systemctl.xml | 1 + + man/systemd.xml | 1 + + src/shared/pager.c | 23 +++++++++++++++++++++-- + 4 files changed, 32 insertions(+), 2 deletions(-) + +diff --git a/man/less-variables.xml b/man/less-variables.xml +index 08e513c99f8e..c52511ca8e18 100644 +--- a/man/less-variables.xml ++++ b/man/less-variables.xml +@@ -64,6 +64,15 @@ + the invoking terminal is determined to be UTF-8 compatible).</para></listitem> + </varlistentry> + ++ <varlistentry id='lesssecure'> ++ <term><varname>$SYSTEMD_LESSSECURE</varname></term> ++ ++ <listitem><para>Takes a boolean argument. Overrides the <varname>$LESSSECURE</varname> environment ++ variable when invoking the pager, which controls the "secure" mode of less (which disables commands ++ such as <literal>|</literal> which allow to easily shell out to external command lines). By default ++ less secure mode is enabled, with this setting it may be disabled.</para></listitem> ++ </varlistentry> ++ + <varlistentry id='colors'> + <term><varname>$SYSTEMD_COLORS</varname></term> + +diff --git a/man/systemctl.xml b/man/systemctl.xml +index 1c5502883700..a3f0c3041a57 100644 +--- a/man/systemctl.xml ++++ b/man/systemctl.xml +@@ -2240,6 +2240,7 @@ Jan 12 10:46:45 example.com bluetoothd[8900]: gatt-time-server: Input/output err + <xi:include href="less-variables.xml" xpointer="pager"/> + <xi:include href="less-variables.xml" xpointer="less"/> + <xi:include href="less-variables.xml" xpointer="lesscharset"/> ++ <xi:include href="less-variables.xml" xpointer="lesssecure"/> + <xi:include href="less-variables.xml" xpointer="colors"/> + <xi:include href="less-variables.xml" xpointer="urlify"/> + </refsect1> +diff --git a/man/systemd.xml b/man/systemd.xml +index a9040545c2ab..c92cfef77689 100644 +--- a/man/systemd.xml ++++ b/man/systemd.xml +@@ -692,6 +692,7 @@ + <xi:include href="less-variables.xml" xpointer="pager"/> + <xi:include href="less-variables.xml" xpointer="less"/> + <xi:include href="less-variables.xml" xpointer="lesscharset"/> ++ <xi:include href="less-variables.xml" xpointer="lesssecure"/> + <xi:include href="less-variables.xml" xpointer="colors"/> + <xi:include href="less-variables.xml" xpointer="urlify"/> + +diff --git a/src/shared/pager.c b/src/shared/pager.c +index e03be6d23b2d..9c21881241f5 100644 +--- a/src/shared/pager.c ++++ b/src/shared/pager.c +@@ -9,6 +9,7 @@ + #include <unistd.h> + + #include "copy.h" ++#include "env-util.h" + #include "fd-util.h" + #include "fileio.h" + #include "io-util.h" +@@ -152,8 +153,7 @@ int pager_open(PagerFlags flags) { + _exit(EXIT_FAILURE); + } + +- /* Initialize a good charset for less. This is +- * particularly important if we output UTF-8 ++ /* Initialize a good charset for less. This is particularly important if we output UTF-8 + * characters. */ + less_charset = getenv("SYSTEMD_LESSCHARSET"); + if (!less_charset && is_locale_utf8()) +@@ -164,6 +164,25 @@ int pager_open(PagerFlags flags) { + _exit(EXIT_FAILURE); + } + ++ /* People might invoke us from sudo, don't needlessly allow less to be a way to shell out ++ * privileged stuff. */ ++ r = getenv_bool("SYSTEMD_LESSSECURE"); ++ if (r == 0) { /* Remove env var if off */ ++ if (unsetenv("LESSSECURE") < 0) { ++ log_error_errno(errno, "Failed to uset environment variable LESSSECURE: %m"); ++ _exit(EXIT_FAILURE); ++ } ++ } else { ++ /* Set env var otherwise */ ++ if (r < 0) ++ log_warning_errno(r, "Unable to parse $SYSTEMD_LESSSECURE, ignoring: %m"); ++ ++ if (setenv("LESSSECURE", "1", 1) < 0) { ++ log_error_errno(errno, "Failed to set environment variable LESSSECURE: %m"); ++ _exit(EXIT_FAILURE); ++ } ++ } ++ + if (pager_args) { + r = loop_write(exe_name_pipe[1], pager_args[0], strlen(pager_args[0]) + 1, false); + if (r < 0) { |