diff options
Diffstat (limited to 'system/sysklogd/sysklogd-1.4.2-caen-owl-klogd-drop-root.patch')
| -rw-r--r-- | system/sysklogd/sysklogd-1.4.2-caen-owl-klogd-drop-root.patch | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/system/sysklogd/sysklogd-1.4.2-caen-owl-klogd-drop-root.patch b/system/sysklogd/sysklogd-1.4.2-caen-owl-klogd-drop-root.patch new file mode 100644 index 000000000..40b8817d4 --- /dev/null +++ b/system/sysklogd/sysklogd-1.4.2-caen-owl-klogd-drop-root.patch @@ -0,0 +1,162 @@ +http://cvsweb.openwall.com/cgi/cvsweb.cgi/~checkout~/Owl/packages/sysklogd/sysklogd-1.4.2-caen-owl-klogd-drop-root.diff?rev=1.2;content-type=text%2Fplain +diff -upk.orig sysklogd-1.4.2.orig/klogd.8 sysklogd-1.4.2/klogd.8 +--- sysklogd-1.4.2.orig/klogd.8 2005-03-11 16:12:09 +0000 ++++ sysklogd-1.4.2/klogd.8 2005-08-18 14:37:47 +0000 +@@ -18,6 +19,12 @@ klogd \- Kernel Log Daemon + .RB [ " \-f " + .I fname + ] ++.RB [ " \-u " ++.I username ++] ++.RB [ " \-j " ++.I chroot_dir ++] + .RB [ " \-iI " ] + .RB [ " \-n " ] + .RB [ " \-o " ] +@@ -53,6 +60,20 @@ stderr. + .BI "\-f " file + Log messages to the specified filename rather than to the syslog facility. + .TP ++.BI "\-u " username ++Tells klogd to become the specified user and drop root privileges before ++starting logging. ++.TP ++.BI "\-j " chroot_dir ++Tells klogd to ++.BR chroot (2) ++into this directory after initializing. ++This option is only valid if the \-u option is also used to run klogd ++without root privileges. ++Note that the use of this option will prevent \-i and \-I from working ++unless you set up the chroot directory in such a way that klogd can still ++read the kernel module symbols. ++.TP + .BI "\-i \-I" + Signal the currently executing klogd daemon. Both of these switches control + the loading/reloading of symbol information. The \-i switch signals the +diff -upk.orig sysklogd-1.4.2.orig/klogd.c sysklogd-1.4.2/klogd.c +--- sysklogd-1.4.2.orig/klogd.c 2005-08-18 12:29:52 +0000 ++++ sysklogd-1.4.2/klogd.c 2005-08-18 14:37:47 +0000 +@@ -261,6 +261,8 @@ + #include <stdarg.h> + #include <paths.h> + #include <stdlib.h> ++#include <pwd.h> ++#include <grp.h> + #include "klogd.h" + #include "ksyms.h" + #ifndef TESTING +@@ -315,6 +317,9 @@ static enum LOGSRC {none, proc, kernel} + int debugging = 0; + int symbols_twice = 0; + ++char *server_user = NULL; ++char *chroot_dir = NULL; ++int log_flags = 0; + + /* Function prototypes. */ + extern int ksyslog(int type, char *buf, int len); +@@ -535,8 +540,9 @@ static enum LOGSRC GetKernelLogSrc(void) + * First do a stat to determine whether or not the proc based + * file system is available to get kernel messages from. + */ +- if ( use_syscall || +- ((stat(_PATH_KLOG, &sb) < 0) && (errno == ENOENT)) ) ++ if (!server_user && ++ (use_syscall || ++ ((stat(_PATH_KLOG, &sb) < 0) && (errno == ENOENT)))) + { + /* Initialize kernel logging. */ + ksyslog(1, NULL, 0); +@@ -983,6 +989,27 @@ static void LogProcLine(void) + } + + ++static int drop_root(void) ++{ ++ struct passwd *pw; ++ ++ if (!(pw = getpwnam(server_user))) return -1; ++ ++ if (!pw->pw_uid) return -1; ++ ++ if (chroot_dir) { ++ if (chdir(chroot_dir)) return -1; ++ if (chroot(".")) return -1; ++ } ++ ++ if (setgroups(0, NULL)) return -1; ++ if (setgid(pw->pw_gid)) return -1; ++ if (setuid(pw->pw_uid)) return -1; ++ ++ return 0; ++} ++ ++ + int main(argc, argv) + + int argc; +@@ -1000,7 +1027,7 @@ int main(argc, argv) + chdir ("/"); + #endif + /* Parse the command-line. */ +- while ((ch = getopt(argc, argv, "c:df:iIk:nopsvx2")) != EOF) ++ while ((ch = getopt(argc, argv, "c:df:u:j:iIk:nopsvx2")) != EOF) + switch((char)ch) + { + case '2': /* Print lines with symbols twice. */ +@@ -1022,6 +1049,10 @@ int main(argc, argv) + case 'I': + SignalDaemon(SIGUSR2); + return(0); ++ case 'j': /* chroot 'j'ail */ ++ chroot_dir = optarg; ++ log_flags |= LOG_NDELAY; ++ break; + case 'k': /* Kernel symbol file. */ + symfile = optarg; + break; +@@ -1037,6 +1068,9 @@ int main(argc, argv) + case 's': /* Use syscall interface. */ + use_syscall = 1; + break; ++ case 'u': /* Run as this user */ ++ server_user = optarg; ++ break; + case 'v': + printf("klogd %s.%s\n", VERSION, PATCHLEVEL); + exit (1); +@@ -1045,6 +1079,10 @@ int main(argc, argv) + break; + } + ++ if (chroot_dir && !server_user) { ++ fputs("'-j' is only valid with '-u'\n", stderr); ++ exit(1); ++ } + + /* Set console logging level. */ + if ( log_level != (char *) 0 ) +@@ -1158,7 +1196,7 @@ int main(argc, argv) + } + } + else +- openlog("kernel", 0, LOG_KERN); ++ openlog("kernel", log_flags, LOG_KERN); + + + /* Handle one-shot logging. */ +@@ -1191,6 +1229,11 @@ int main(argc, argv) + } + } + ++ if (server_user && drop_root()) { ++ syslog(LOG_ALERT, "klogd: failed to drop root"); ++ Terminate(); ++ } ++ + /* The main loop. */ + while (1) + { |