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freebsd-ports/audio/esound/files/patch-ad
Brian Feldman b5f03b15f6 Fix EsounD daemon and library insecurities noted on BugTraq.
Instead of an 0777 chock-full-o-races /tmp/.esd/, use a 0755 ~/.esd/.
Also, the ~/.esd/socket of course needs only be 0644.

Two macros had to be backed up by functions which returned a static
buffer.  These macros, ESD_UNIX_SOCKET_DIR and ESD_UNIX_SOCKET_NAME,
both return constant strings as the new functions esd_unix_socket_dir()
and esd_unix_socket_name(), so the static buffers are not particularly
evil.

The fix has been tested (without needing recompilation) by the most
important EsounD-related apps, esd and XMMS, and works perfectly
in both cases.  It will be submitted to the EsounD maintainer to
be fixed in the source distribution ASAP.

Approved by:    Security Officer Kris
Noticed by:     Stan Bubrouski <satan@FASTDIAL.NET>
2000-06-30 04:21:53 +00:00

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--- esdlib.c.orig Thu Jun 29 23:31:04 2000
+++ esdlib.c Thu Jun 29 23:31:21 2000
@@ -19,6 +19,8 @@
#include <arpa/inet.h>
#include <errno.h>
#include <sys/wait.h>
+#include <pwd.h>
+#include <limits.h>
#include <sys/un.h>
@@ -1421,4 +1423,34 @@
*/
return close( esd );
+}
+
+char *
+esd_unix_socket_dir(void) {
+ static char *sockdir = NULL, sockdirbuf[PATH_MAX];
+ struct passwd *pw;
+
+ if (sockdir != NULL)
+ return (sockdir);
+ pw = getpwuid(getuid());
+ if (pw == NULL || pw->pw_dir == NULL) {
+ fprintf(stderr, "esd: could not find home directory\n");
+ exit(1);
+ }
+ snprintf(sockdirbuf, sizeof(sockdirbuf), "%s/.esd", pw->pw_dir);
+ endpwent();
+ sockdir = sockdirbuf;
+ return (sockdir);
+}
+
+char *
+esd_unix_socket_name(void) {
+ static char *sockname = NULL, socknamebuf[PATH_MAX];
+
+ if (sockname != NULL)
+ return (sockname);
+ snprintf(socknamebuf, sizeof(socknamebuf), "%s/socket",
+ esd_unix_socket_dir());
+ sockname = socknamebuf;
+ return (sockname);
}