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dtspcd: fix symlink vulnerability, a couple warnings

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This commit is contained in:
Jon Trulson 2012-05-26 18:57:11 -06:00
parent 70128313e9
commit a2959aa768
1 changed files with 18 additions and 3 deletions
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21
cde/programs/dtspcd/main.c
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@ -151,7 +151,7 @@ XeChar HomeDir[MAXPATHLEN + 6];
XeChar ShellDir[MAXPATHLEN + 7]; XeChar ShellDir[MAXPATHLEN + 7];
XeString *default_environment; XeString *default_environment;
int client_validated=NULL; int client_validated=0;
int SPCD_Abort_Okay = FALSE; int SPCD_Abort_Okay = FALSE;
SPC_Connection_Ptr client_connection; SPC_Connection_Ptr client_connection;
@ -185,7 +185,7 @@ static int exit_timeout = SPCD_DEFAULT_TIMEOUT;
static int request_pending = SPCD_NO_REQUEST_PENDING; static int request_pending = SPCD_NO_REQUEST_PENDING;
/*----------------------------------------------------------------------+*/ /*----------------------------------------------------------------------+*/
int main(unsigned int argc, XeString *argv) int main(int argc, XeString *argv)
/*----------------------------------------------------------------------+*/ /*----------------------------------------------------------------------+*/
{ {
/* Parse the command line and set globals accordingly. */ /* Parse the command line and set globals accordingly. */
@ -647,9 +647,24 @@ int Client_Register(protocol_request_ptr prot)
/* file in the temp directory? */ /* file in the temp directory? */
if(lstat(tmpfile, &buf)==ERROR) { if(lstat(tmpfile, &buf)==ERROR) {
int terrno = errno;
SPC_Write_Protocol_Request(client_connection, NULL, LOGFILE_REPLY, SPC_Write_Protocol_Request(client_connection, NULL, LOGFILE_REPLY,
FAILED_FILE_NAME, NULL, NULL); FAILED_FILE_NAME, NULL, NULL);
SPC_Format_Log("+++> FAILURE: stat authentication file '%s'.", tmpfile); SPC_Format_Log("+++> FAILURE: lstat authentication file '%s'.", tmpfile);
SPC_Format_Log("+++> FAILURE: lstat() returned error '%s'\n",
strerror(terrno));
if (free_netfile)
tt_free(netfile);
XeFree(tmpfile);
SPC_Error(SPC_Bad_Authentication);
return(SPC_ERROR);
}
if (S_ISLNK(buf.st_mode))
{ /* somebody is jerkin us around */
SPC_Write_Protocol_Request(client_connection, NULL, LOGFILE_REPLY,
FAILED_FILE_NAME, NULL, NULL);
SPC_Format_Log("+++> FAILURE: lstat authentication file '%s' is a symlink! Possible compromise attempt.", tmpfile);
if (free_netfile) if (free_netfile)
tt_free(netfile); tt_free(netfile);
XeFree(tmpfile); XeFree(tmpfile);