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Accepting request 1139665 from home:jsegitz:branches:Base:System

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- Set safe permissions for crontab backups. Add
  * safe-backup-permissions.patch

OBS-URL: https://build.opensuse.org/request/show/1139665
OBS-URL: https://build.opensuse.org/package/show/Base:System/cronie?expand=0&rev=217
This commit is contained in:
Danilo Spinella 2024-01-22 15:44:30 +00:00 committed by Git OBS Bridge
parent 08b459752f
commit e9067d45a1
3 changed files with 40 additions and 0 deletions
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6
cronie.changes
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@ -1,3 +1,9 @@
-------------------------------------------------------------------
Thu Jan 18 08:27:24 UTC 2024 - Johannes Segitz <jsegitz@suse.com>
- Set safe permissions for crontab backups. Add
* safe-backup-permissions.patch
-------------------------------------------------------------------
Thu Jan 11 17:52:56 UTC 2024 - Danilo Spinella <danilo.spinella@suse.com>

3
cronie.spec
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@ -50,6 +50,8 @@ Patch13: fix-manpage-replace-anacrontab-with-crontab.patch
Patch14: cronie-pam_config-nonlogin.diff
# PATCH-FIX-UPSTREAM danilo.spinella@suse.com bsc#1218377
Patch15: test-for-etc-default-anacron.patch
# PATCH-FIX-UPSTREAM jsegitz@suse.de https://github.com/cronie-crond/cronie/pull/172
Patch16: safe-backup-permissions.patch
BuildRequires: audit-devel
BuildRequires: autoconf
BuildRequires: automake
@ -112,6 +114,7 @@ cp %{SOURCE7} ./cron_to_cronie.README
%patch14 -p1
%endif
%patch15 -p1
%patch16 -p1
%build
# fill macro CRON_VERSION it is used in top three lines of crontab file,should be reworked

31
safe-backup-permissions.patch Normal file
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@ -0,0 +1,31 @@
Index: cronie-cronie-1.7.0/src/crontab.c
===================================================================
--- cronie-cronie-1.7.0.orig/src/crontab.c
+++ cronie-cronie-1.7.0/src/crontab.c
@@ -520,6 +520,7 @@ static int backup_crontab(const char *cr
FILE *backup_file;
struct stat sb;
int retval = 0;
+ mode_t old_umask;
/* create backup directory */
if ((env_value = getenv("XDG_CACHE_HOME")) != NULL) {
@@ -590,6 +591,9 @@ static int backup_crontab(const char *cr
}
}
+ // ensure backup file has strict permssions. Crontabs are not readable for
+ // other users and might contain sensitive information
+ old_umask = umask(0077);
if ((backup_file = fopen(backup_path, "w+")) == NULL) {
fprintf(stderr, "Failed to write to the backup file: ");
perror(backup_path);
@@ -598,6 +602,8 @@ static int backup_crontab(const char *cr
}
swapback:
+ umask(old_umask);
+
if (swap_uids_back() < OK) {
perror("swapping uids back");
exit(ERROR_EXIT);