mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-23 11:18:54 +00:00
125 lines
2.8 KiB
C
125 lines
2.8 KiB
C
/*
|
|
* "...we will have peace, when you and all your works have perished--and
|
|
* the works of your dark master to whom you would deliver us. You are a
|
|
* liar, Saruman, and a corrupter of men's hearts." --Theoden
|
|
*/
|
|
|
|
#include "EXTERN.h"
|
|
#define PERL_IN_TAINT_C
|
|
#include "perl.h"
|
|
|
|
void
|
|
Perl_taint_proper(pTHX_ const char *f, const char *s)
|
|
{
|
|
dTHR; /* just for taint */
|
|
char *ug;
|
|
|
|
#ifdef HAS_SETEUID
|
|
DEBUG_u(PerlIO_printf(Perl_debug_log,
|
|
"%s %d %"Uid_t_f" %"Uid_t_f"\n", s, PL_tainted, PL_uid, PL_euid));
|
|
#endif
|
|
|
|
if (PL_tainted) {
|
|
if (!f)
|
|
f = PL_no_security;
|
|
if (PL_euid != PL_uid)
|
|
ug = " while running setuid";
|
|
else if (PL_egid != PL_gid)
|
|
ug = " while running setgid";
|
|
else
|
|
ug = " while running with -T switch";
|
|
if (!PL_unsafe)
|
|
Perl_croak(aTHX_ f, s, ug);
|
|
else if (ckWARN(WARN_TAINT))
|
|
Perl_warner(aTHX_ WARN_TAINT, f, s, ug);
|
|
}
|
|
}
|
|
|
|
void
|
|
Perl_taint_env(pTHX)
|
|
{
|
|
SV** svp;
|
|
MAGIC* mg;
|
|
char** e;
|
|
static char* misc_env[] = {
|
|
"IFS", /* most shells' inter-field separators */
|
|
"CDPATH", /* ksh dain bramage #1 */
|
|
"ENV", /* ksh dain bramage #2 */
|
|
"BASH_ENV", /* bash dain bramage -- I guess it's contagious */
|
|
NULL
|
|
};
|
|
|
|
if (!PL_envgv)
|
|
return;
|
|
|
|
#ifdef VMS
|
|
{
|
|
int i = 0;
|
|
char name[10 + TYPE_DIGITS(int)] = "DCL$PATH";
|
|
|
|
while (1) {
|
|
if (i)
|
|
(void)sprintf(name,"DCL$PATH;%d", i);
|
|
svp = hv_fetch(GvHVn(PL_envgv), name, strlen(name), FALSE);
|
|
if (!svp || *svp == &PL_sv_undef)
|
|
break;
|
|
if (SvTAINTED(*svp)) {
|
|
dTHR;
|
|
TAINT;
|
|
taint_proper("Insecure %s%s", "$ENV{DCL$PATH}");
|
|
}
|
|
if ((mg = mg_find(*svp, 'e')) && MgTAINTEDDIR(mg)) {
|
|
dTHR;
|
|
TAINT;
|
|
taint_proper("Insecure directory in %s%s", "$ENV{DCL$PATH}");
|
|
}
|
|
i++;
|
|
}
|
|
}
|
|
#endif /* VMS */
|
|
|
|
svp = hv_fetch(GvHVn(PL_envgv),"PATH",4,FALSE);
|
|
if (svp && *svp) {
|
|
if (SvTAINTED(*svp)) {
|
|
dTHR;
|
|
TAINT;
|
|
taint_proper("Insecure %s%s", "$ENV{PATH}");
|
|
}
|
|
if ((mg = mg_find(*svp, 'e')) && MgTAINTEDDIR(mg)) {
|
|
dTHR;
|
|
TAINT;
|
|
taint_proper("Insecure directory in %s%s", "$ENV{PATH}");
|
|
}
|
|
}
|
|
|
|
#ifndef VMS
|
|
/* tainted $TERM is okay if it contains no metachars */
|
|
svp = hv_fetch(GvHVn(PL_envgv),"TERM",4,FALSE);
|
|
if (svp && *svp && SvTAINTED(*svp)) {
|
|
dTHR; /* just for taint */
|
|
STRLEN n_a;
|
|
bool was_tainted = PL_tainted;
|
|
char *t = SvPV(*svp, n_a);
|
|
char *e = t + n_a;
|
|
PL_tainted = was_tainted;
|
|
if (t < e && isALNUM(*t))
|
|
t++;
|
|
while (t < e && (isALNUM(*t) || *t == '-' || *t == ':'))
|
|
t++;
|
|
if (t < e) {
|
|
TAINT;
|
|
taint_proper("Insecure $ENV{%s}%s", "TERM");
|
|
}
|
|
}
|
|
#endif /* !VMS */
|
|
|
|
for (e = misc_env; *e; e++) {
|
|
svp = hv_fetch(GvHVn(PL_envgv), *e, strlen(*e), FALSE);
|
|
if (svp && *svp != &PL_sv_undef && SvTAINTED(*svp)) {
|
|
dTHR; /* just for taint */
|
|
TAINT;
|
|
taint_proper("Insecure $ENV{%s}%s", *e);
|
|
}
|
|
}
|
|
}
|