diff options
Diffstat (limited to 'poky/meta/recipes-extended/sudo/files/CVE-2023-22809.patch')
| -rw-r--r-- | poky/meta/recipes-extended/sudo/files/CVE-2023-22809.patch | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/poky/meta/recipes-extended/sudo/files/CVE-2023-22809.patch b/poky/meta/recipes-extended/sudo/files/CVE-2023-22809.patch new file mode 100644 index 0000000000..6c47eb3e44 --- /dev/null +++ b/poky/meta/recipes-extended/sudo/files/CVE-2023-22809.patch @@ -0,0 +1,113 @@ +Backport of: + +# HG changeset patch +# Parent 7275148cad1f8cd3c350026460acc4d6ad349c3a +sudoedit: do not permit editor arguments to include "--" +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. + +CVE: CVE-2023-22809 +Upstream-Staus: Backport [http://archive.ubuntu.com/ubuntu/pool/main/s/sudo/sudo_1.8.31-1ubuntu1.4.debian.tar.xz] +Signed-off-by: Omkar Patil <omkar.patil@kpit.com> + +--- a/plugins/sudoers/editor.c ++++ b/plugins/sudoers/editor.c +@@ -56,7 +56,7 @@ resolve_editor(const char *ed, size_t ed + 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) + + /* +@@ -102,6 +102,21 @@ resolve_editor(const char *ed, size_t ed + free(editor_path); + while (nargc--) + free(nargv[nargc]); ++ free(nargv); ++ debug_return_str(NULL); ++ } ++ ++ /* ++ * 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; ++ free(editor_path); ++ while (nargc--) ++ free(nargv[nargc]); + free(nargv); + debug_return_str(NULL); + } +--- a/plugins/sudoers/sudoers.c ++++ b/plugins/sudoers/sudoers.c +@@ -616,20 +616,31 @@ sudoers_policy_main(int argc, char * con + + /* 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; +--- a/plugins/sudoers/visudo.c ++++ b/plugins/sudoers/visudo.c +@@ -308,7 +308,7 @@ static char * + 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) +@@ -342,7 +342,11 @@ get_editor(int *editor_argc, char ***edi + 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); + } |