summaryrefslogtreecommitdiff
path: root/system/sudo/CVE-2021-3156.patch
diff options
context:
space:
mode:
Diffstat (limited to 'system/sudo/CVE-2021-3156.patch')
-rw-r--r--system/sudo/CVE-2021-3156.patch165
1 files changed, 0 insertions, 165 deletions
diff --git a/system/sudo/CVE-2021-3156.patch b/system/sudo/CVE-2021-3156.patch
deleted file mode 100644
index 7cb492d61..000000000
--- a/system/sudo/CVE-2021-3156.patch
+++ /dev/null
@@ -1,165 +0,0 @@
-
-# HG changeset patch
-# User Todd C. Miller <Todd.Miller@sudo.ws>
-# Date 1611416639 25200
-# Node ID 049ad90590be1e5dfb7df2675d2eb3e37c96ab86
-# Parent a97dc92eae6b60ae285055441341d493c17262ff
-Fix potential buffer overflow when unescaping backslashes in user_args.
-Also, do not try to unescaping backslashes unless in run mode *and*
-we are running the command via a shell.
-Found by Qualys, this fixes CVE-2021-3156.
-
-diff -r a97dc92eae6b -r 049ad90590be plugins/sudoers/sudoers.c
---- a/plugins/sudoers/sudoers.c Sat Jan 23 08:43:59 2021 -0700
-+++ b/plugins/sudoers/sudoers.c Sat Jan 23 08:43:59 2021 -0700
-@@ -547,7 +547,7 @@
-
- /* If run as root with SUDO_USER set, set sudo_user.pw to that user. */
- /* XXX - causes confusion when root is not listed in sudoers */
-- if (sudo_mode & (MODE_RUN | MODE_EDIT) && prev_user != NULL) {
-+ if (ISSET(sudo_mode, MODE_RUN|MODE_EDIT) && prev_user != NULL) {
- if (user_uid == 0 && strcmp(prev_user, "root") != 0) {
- struct passwd *pw;
-
-@@ -932,8 +932,8 @@
- if (user_cmnd == NULL)
- user_cmnd = NewArgv[0];
-
-- if (sudo_mode & (MODE_RUN | MODE_EDIT | MODE_CHECK)) {
-- if (ISSET(sudo_mode, MODE_RUN | MODE_CHECK)) {
-+ if (ISSET(sudo_mode, MODE_RUN|MODE_EDIT|MODE_CHECK)) {
-+ if (!ISSET(sudo_mode, MODE_EDIT)) {
- if (def_secure_path && !user_is_exempt())
- path = def_secure_path;
- if (!set_perms(PERM_RUNAS))
-@@ -961,7 +961,8 @@
- sudo_warnx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
- debug_return_int(NOT_FOUND_ERROR);
- }
-- if (ISSET(sudo_mode, MODE_SHELL|MODE_LOGIN_SHELL)) {
-+ if (ISSET(sudo_mode, MODE_SHELL|MODE_LOGIN_SHELL) &&
-+ ISSET(sudo_mode, MODE_RUN)) {
- /*
- * When running a command via a shell, the sudo front-end
- * escapes potential meta chars. We unescape non-spaces
-@@ -969,10 +970,22 @@
- */
- for (to = user_args, av = NewArgv + 1; (from = *av); av++) {
- while (*from) {
-- if (from[0] == '\\' && !isspace((unsigned char)from[1]))
-+ if (from[0] == '\\' && from[1] != '\0' &&
-+ !isspace((unsigned char)from[1])) {
- from++;
-+ }
-+ if (size - (to - user_args) < 1) {
-+ sudo_warnx(U_("internal error, %s overflow"),
-+ __func__);
-+ debug_return_int(NOT_FOUND_ERROR);
-+ }
- *to++ = *from++;
- }
-+ if (size - (to - user_args) < 1) {
-+ sudo_warnx(U_("internal error, %s overflow"),
-+ __func__);
-+ debug_return_int(NOT_FOUND_ERROR);
-+ }
- *to++ = ' ';
- }
- *--to = '\0';
-
-
-# HG changeset patch
-# User Todd C. Miller <Todd.Miller@sudo.ws>
-# Date 1611416639 25200
-# Node ID 9b97f1787804aedccaec63c379053b1a91a0e409
-# Parent 90aba6ba6e03f3bc33b4eabf16358396ed83642d
-Reset valid_flags to MODE_NONINTERACTIVE for sudoedit.
-This is consistent with how the -e option is handled.
-Also reject -H and -P flags for sudoedit as was done in sudo 1.7.
-Found by Qualys, this is part of the fix for CVE-2021-3156.
-
-diff -r 90aba6ba6e03 -r 9b97f1787804 src/parse_args.c
---- a/src/parse_args.c Mon Jan 18 12:30:52 2021 +0100
-+++ b/src/parse_args.c Sat Jan 23 08:43:59 2021 -0700
-@@ -117,7 +117,10 @@
- /*
- * Default flags allowed when running a command.
- */
--#define DEFAULT_VALID_FLAGS (MODE_BACKGROUND|MODE_PRESERVE_ENV|MODE_RESET_HOME|MODE_LOGIN_SHELL|MODE_NONINTERACTIVE|MODE_SHELL)
-+#define DEFAULT_VALID_FLAGS (MODE_BACKGROUND|MODE_PRESERVE_ENV|MODE_RESET_HOME|MODE_LOGIN_SHELL|MODE_NONINTERACTIVE|MODE_PRESERVE_GROUPS|MODE_SHELL)
-+#define EDIT_VALID_FLAGS MODE_NONINTERACTIVE
-+#define LIST_VALID_FLAGS (MODE_NONINTERACTIVE|MODE_LONG_LIST)
-+#define VALIDATE_VALID_FLAGS MODE_NONINTERACTIVE
-
- /* Option number for the --host long option due to ambiguity of the -h flag. */
- #define OPT_HOSTNAME 256
-@@ -262,6 +265,7 @@
- progname = "sudoedit";
- mode = MODE_EDIT;
- sudo_settings[ARG_SUDOEDIT].value = "true";
-+ valid_flags = EDIT_VALID_FLAGS;
- }
-
- /* Load local IP addresses and masks. */
-@@ -365,7 +369,7 @@
- usage_excl();
- mode = MODE_EDIT;
- sudo_settings[ARG_SUDOEDIT].value = "true";
-- valid_flags = MODE_NONINTERACTIVE;
-+ valid_flags = EDIT_VALID_FLAGS;
- break;
- case 'g':
- assert(optarg != NULL);
-@@ -377,6 +381,7 @@
- break;
- case 'H':
- sudo_settings[ARG_SET_HOME].value = "true";
-+ SET(flags, MODE_RESET_HOME);
- break;
- case 'h':
- if (optarg == NULL) {
-@@ -431,7 +436,7 @@
- usage_excl();
- }
- mode = MODE_LIST;
-- valid_flags = MODE_NONINTERACTIVE|MODE_LONG_LIST;
-+ valid_flags = LIST_VALID_FLAGS;
- break;
- case 'n':
- SET(flags, MODE_NONINTERACTIVE);
-@@ -439,6 +444,7 @@
- break;
- case 'P':
- sudo_settings[ARG_PRESERVE_GROUPS].value = "true";
-+ SET(flags, MODE_PRESERVE_GROUPS);
- break;
- case 'p':
- /* An empty prompt is allowed. */
-@@ -505,7 +511,7 @@
- if (mode && mode != MODE_VALIDATE)
- usage_excl();
- mode = MODE_VALIDATE;
-- valid_flags = MODE_NONINTERACTIVE;
-+ valid_flags = VALIDATE_VALID_FLAGS;
- break;
- case 'V':
- if (mode && mode != MODE_VERSION)
-@@ -533,7 +539,7 @@
- if (!mode) {
- /* Defer -k mode setting until we know whether it is a flag or not */
- if (sudo_settings[ARG_IGNORE_TICKET].value != NULL) {
-- if (argc == 0 && !(flags & (MODE_SHELL|MODE_LOGIN_SHELL))) {
-+ if (argc == 0 && !ISSET(flags, MODE_SHELL|MODE_LOGIN_SHELL)) {
- mode = MODE_INVALIDATE; /* -k by itself */
- sudo_settings[ARG_IGNORE_TICKET].value = NULL;
- valid_flags = 0;
-@@ -601,7 +607,7 @@
- /*
- * For shell mode we need to rewrite argv
- */
-- if (ISSET(mode, MODE_RUN) && ISSET(flags, MODE_SHELL)) {
-+ if (ISSET(flags, MODE_SHELL|MODE_LOGIN_SHELL) && ISSET(mode, MODE_RUN)) {
- char **av, *cmnd = NULL;
- int ac = 1;
-
-
generated by cgit v1.2.3-60-g2f50 (git 2.42.0) at 2024-06-18 13:25:00 +0000