Apple-2gs-SW/telnetd
1
0
Fork 0
mirror of https://github.com/sheumann/telnetd.git synced 2024-10-31 12:04:35 +00:00
Code Issues Projects Releases Wiki Activity

(scrub_env): change to only accept a listed set of variables,

Browse Source 
including only non-filename contents for TERMCAP


git-svn-id: http://svn0.us-east.freebsd.org/base/head/contrib/telnet@69825 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f
This commit is contained in:
assar 2000-12-10 20:50:20 +00:00
parent fe910aa69a
commit 40b68302ee
1 changed files with 37 additions and 23 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

54
telnetd/sys_term.c
View File

@ -1839,34 +1839,48 @@ addarg(argv, val)
/*
* scrub_env()
*
* Remove a few things from the environment that
* don't need to be there.
* We only accept the environment variables listed below.
*/
void
scrub_env()
{
register char **cpp, **cpp2;
static const char *reject[] = {
"TERMCAP=/",
NULL
};
static const char *accept[] = {
"XAUTH=", "XAUTHORITY=", "DISPLAY=",
"TERM=",
"EDITOR=",
"PAGER=",
"LOGNAME=",
"POSIXLY_CORRECT=",
"PRINTER=",
NULL
};
char **cpp, **cpp2;
const char **p;
for (cpp2 = cpp = environ; *cpp; cpp++) {
#ifdef __FreeBSD__
if (strncmp(*cpp, "LD_LIBRARY_PATH=", 16) &&
strncmp(*cpp, "LD_PRELOAD=", 11) &&
#else
if (strncmp(*cpp, "LD_", 3) &&
strncmp(*cpp, "_RLD_", 5) &&
strncmp(*cpp, "LIBPATH=", 8) &&
#endif
strncmp(*cpp, "LOCALDOMAIN=", 12) &&
strncmp(*cpp, "RES_OPTIONS=", 12) &&
strncmp(*cpp, "TERMINFO=", 9) &&
strncmp(*cpp, "TERMINFO_DIRS=", 14) &&
strncmp(*cpp, "TERMPATH=", 9) &&
strncmp(*cpp, "TERMCAP=/", 9) &&
strncmp(*cpp, "ENV=", 4) &&
strncmp(*cpp, "IFS=", 4))
int reject_it = 0;
for(p = reject; *p; p++)
if(strncmp(*cpp, *p, strlen(*p)) == 0) {
reject_it = 1;
break;
}
if (reject_it)
continue;
for(p = accept; *p; p++)
if(strncmp(*cpp, *p, strlen(*p)) == 0)
break;
if(*p != NULL)
*cpp2++ = *cpp;
}
*cpp2 = 0;
*cpp2 = NULL;
}
/*