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-rw-r--r--debian/changelog8
-rw-r--r--debian/patches/CVE-2023-22809.patch156
-rw-r--r--debian/patches/series2
3 files changed, 166 insertions, 0 deletions
diff --git a/debian/changelog b/debian/changelog
index 2b9d1d0..770d48c 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,11 @@
+sudo (1.8.27-1+deb10u5) buster-security; urgency=high
+
+ * Non-maintainer upload by the LTS Team.
+ * CVE-2023-22809
+ sudoedit: do not permit editor arguments to include "--"
+
+ -- Thorsten Alteholz <debian@alteholz.de> Mon, 16 Jan 2023 21:03:02 +0100
+
sudo (1.8.27-1+deb10u4progress5u1) engywuck-security; urgency=high
* Uploading to engywuck-security, remaining changes:
diff --git a/debian/patches/CVE-2023-22809.patch b/debian/patches/CVE-2023-22809.patch
new file mode 100644
index 0000000..454a13b
--- /dev/null
+++ b/debian/patches/CVE-2023-22809.patch
@@ -0,0 +1,156 @@
+Description: sudoedit: do not permit editor arguments to include "--"
+Origin: upstream
+Bug-Debian-Security: https://security-tracker.debian.org/tracker/CVE-2023-22809
+
+We use "--" to separate the editor and arguments from the files to edit.
+If the editor arguments include "--", sudo can be tricked into allowing
+the user to edit a file not permitted by the security policy.
+Thanks to Matthieu Barjole and Victor Cutillas of Synacktiv
+(https://synacktiv.com) for finding this bug.
+
+Index: sudo-1.8.27/plugins/sudoers/editor.c
+===================================================================
+--- sudo-1.8.27.orig/plugins/sudoers/editor.c 2023-01-16 23:27:07.662719271 +0100
++++ sudo-1.8.27/plugins/sudoers/editor.c 2023-01-18 09:30:21.597115094 +0100
+@@ -50,11 +50,11 @@
+ resolve_editor(const char *ed, size_t edlen, int nfiles, char **files,
+ int *argc_out, char ***argv_out, char * const *whitelist)
+ {
+- char **nargv, *editor, *editor_path = NULL;
++ char **nargv = NULL, *editor, *editor_path = NULL;
+ const char *cp, *ep, *tmp;
+ const char *edend = ed + edlen;
+ struct stat user_editor_sb;
+- int nargc;
++ int nargc = 0;
+ debug_decl(resolve_editor, SUDOERS_DEBUG_UTIL)
+
+ /*
+@@ -73,9 +73,8 @@
+
+ /* If we can't find the editor in the user's PATH, give up. */
+ if (find_path(editor, &editor_path, &user_editor_sb, getenv("PATH"), 0, whitelist) != FOUND) {
+- free(editor);
+ errno = ENOENT;
+- debug_return_str(NULL);
++ goto bad;
+ }
+
+ /* Count rest of arguments and allocate editor argv. */
+@@ -96,13 +95,19 @@
+ for (nargc = 1; (cp = sudo_strsplit(NULL, edend, " \t", &ep)) != NULL; nargc++) {
+ nargv[nargc] = strndup(cp, (size_t)(ep - cp));
+ if (nargv[nargc] == NULL) {
+- sudo_warnx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
+- free(editor_path);
+- while (nargc--)
+- free(nargv[nargc]);
+- free(nargv);
+- debug_return_str(NULL);
++ goto oom;
+ }
++
++ /*
++ * We use "--" to separate the editor and arguments from the files
++ * to edit. The editor arguments themselves may not contain "--".
++ */
++ if (strcmp(nargv[nargc], "--") == 0) {
++ sudo_warnx(U_("ignoring editor: %.*s"), (int)edlen, ed);
++ sudo_warnx("%s", U_("editor arguments may not contain \"--\""));
++ errno = EINVAL;
++ goto bad;
++ }
+ }
+ if (nfiles != 0) {
+ nargv[nargc++] = "--";
+@@ -114,6 +119,21 @@
+ *argc_out = nargc;
+ *argv_out = nargv;
+ debug_return_str(editor_path);
++
++oom:
++ sudo_warnx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
++bad:
++ if (editor) {free(editor); editor=NULL; }
++ if (editor_path) {free(editor_path); editor_path=NULL; }
++ if (nargv != NULL) {
++ while (nargc--) {
++ /* nargv[0] is editor that was already freed above */
++ if (nargc && nargv[nargc]) free(nargv[nargc]);
++ }
++ if (nargv) free(nargv);
++ }
++ debug_return_str(NULL);
++
+ }
+
+ /*
+Index: sudo-1.8.27/plugins/sudoers/sudoers.c
+===================================================================
+--- sudo-1.8.27.orig/plugins/sudoers/sudoers.c 2023-01-16 23:27:07.662719271 +0100
++++ sudo-1.8.27/plugins/sudoers/sudoers.c 2023-01-17 00:15:22.859656116 +0100
+@@ -587,20 +587,31 @@
+
+ /* Note: must call audit before uid change. */
+ if (ISSET(sudo_mode, MODE_EDIT)) {
++ const char *env_editor = NULL;
+ int edit_argc;
+- const char *env_editor;
+
+ free(safe_cmnd);
+ safe_cmnd = find_editor(NewArgc - 1, NewArgv + 1, &edit_argc,
+ &edit_argv, NULL, &env_editor, false);
+ if (safe_cmnd == NULL) {
+- if (errno != ENOENT)
++ switch (errno) {
++ case ENOENT:
++ audit_failure(NewArgc, NewArgv, N_("%s: command not found"),
++ env_editor ? env_editor : def_editor);
++ sudo_warnx(U_("%s: command not found"),
++ env_editor ? env_editor : def_editor);
++ goto bad;
++ case EINVAL:
++ if (def_env_editor && env_editor != NULL) {
++ /* User tried to do something funny with the editor. */
++ log_warningx(SLOG_NO_STDERR|SLOG_SEND_MAIL,
++ "invalid user-specified editor: %s", env_editor);
++ goto bad;
++ }
++ /* FALLTHROUGH */
++ default:
+ goto done;
+- audit_failure(NewArgc, NewArgv, N_("%s: command not found"),
+- env_editor ? env_editor : def_editor);
+- sudo_warnx(U_("%s: command not found"),
+- env_editor ? env_editor : def_editor);
+- goto bad;
++ }
+ }
+ if (audit_success(edit_argc, edit_argv) != 0 && !def_ignore_audit_errors)
+ goto done;
+Index: sudo-1.8.27/plugins/sudoers/visudo.c
+===================================================================
+--- sudo-1.8.27.orig/plugins/sudoers/visudo.c 2023-01-16 23:27:07.662719271 +0100
++++ sudo-1.8.27/plugins/sudoers/visudo.c 2023-01-17 16:24:09.283442400 +0100
+@@ -306,7 +306,7 @@
+ get_editor(int *editor_argc, char ***editor_argv)
+ {
+ char *editor_path = NULL, **whitelist = NULL;
+- const char *env_editor;
++ const char *env_editor = NULL;
+ static char *files[] = { "+1", "sudoers" };
+ unsigned int whitelist_len = 0;
+ debug_decl(get_editor, SUDOERS_DEBUG_UTIL)
+@@ -340,7 +340,11 @@
+ if (editor_path == NULL) {
+ if (def_env_editor && env_editor != NULL) {
+ /* We are honoring $EDITOR so this is a fatal error. */
+- sudo_fatalx(U_("specified editor (%s) doesn't exist"), env_editor);
++ if (errno == ENOENT) {
++ sudo_warnx(U_("specified editor (%s) doesn't exist"),
++ env_editor);
++ }
++ exit(EXIT_FAILURE);
+ }
+ sudo_fatalx(U_("no editor found (editor path = %s)"), def_editor);
+ }
diff --git a/debian/patches/series b/debian/patches/series
index ec23687..286e759 100644
--- a/debian/patches/series
+++ b/debian/patches/series
@@ -11,3 +11,5 @@ Fix-potential-buffer-overflow-when-unescaping-backsl.patch
Fix-the-memset-offset-when-converting-a-v1-timestamp.patch
Don-t-assume-that-argv-is-allocated-as-a-single-flat.patch
CVE-2021-23239.patch
+
+CVE-2023-22809.patch
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-25 10:40:54 +0000