Commit | Line | Data |
---|---|---|
a0d0e21e LW |
1 | /* |
2 | * "...we will have peace, when you and all your works have perished--and | |
3 | * the works of your dark master to whom you would deliver us. You are a | |
4 | * liar, Saruman, and a corrupter of men's hearts." --Theoden | |
5 | */ | |
6 | ||
463ee0b2 | 7 | #include "EXTERN.h" |
864dbfa3 | 8 | #define PERL_IN_TAINT_C |
463ee0b2 LW |
9 | #include "perl.h" |
10 | ||
11 | void | |
dff6d3cd | 12 | Perl_taint_proper(pTHX_ const char *f, const char *s) |
79072805 | 13 | { |
aeea060c | 14 | dTHR; /* just for taint */ |
bbce6d69 | 15 | char *ug; |
16 | ||
a52cb5f7 | 17 | #ifdef HAS_SETEUID |
fb73857a | 18 | DEBUG_u(PerlIO_printf(Perl_debug_log, |
785fb66b | 19 | "%s %d %"Uid_t_f" %"Uid_t_f"\n", s, PL_tainted, PL_uid, PL_euid)); |
a52cb5f7 | 20 | #endif |
1e422769 | 21 | |
3280af22 | 22 | if (PL_tainted) { |
22c35a8c GS |
23 | if (!f) |
24 | f = PL_no_security; | |
3280af22 | 25 | if (PL_euid != PL_uid) |
bbce6d69 | 26 | ug = " while running setuid"; |
3280af22 | 27 | else if (PL_egid != PL_gid) |
bbce6d69 | 28 | ug = " while running setgid"; |
29 | else | |
30 | ug = " while running with -T switch"; | |
3280af22 | 31 | if (!PL_unsafe) |
cea2e8a9 | 32 | Perl_croak(aTHX_ f, s, ug); |
599cee73 | 33 | else if (ckWARN(WARN_TAINT)) |
cea2e8a9 | 34 | Perl_warner(aTHX_ WARN_TAINT, f, s, ug); |
79072805 LW |
35 | } |
36 | } | |
37 | ||
38 | void | |
864dbfa3 | 39 | Perl_taint_env(pTHX) |
79072805 LW |
40 | { |
41 | SV** svp; | |
7bac28a0 | 42 | MAGIC* mg; |
43 | char** e; | |
44 | static char* misc_env[] = { | |
45 | "IFS", /* most shells' inter-field separators */ | |
c90c0ff4 | 46 | "CDPATH", /* ksh dain bramage #1 */ |
47 | "ENV", /* ksh dain bramage #2 */ | |
48 | "BASH_ENV", /* bash dain bramage -- I guess it's contagious */ | |
7bac28a0 | 49 | NULL |
50 | }; | |
1e422769 | 51 | |
142393a6 TM |
52 | if (!PL_envgv) |
53 | return; | |
54 | ||
1e422769 | 55 | #ifdef VMS |
82f1aded | 56 | { |
1e422769 | 57 | int i = 0; |
0dc443ab | 58 | char name[10 + TYPE_DIGITS(int)] = "DCL$PATH"; |
1e422769 | 59 | |
60 | while (1) { | |
61 | if (i) | |
62 | (void)sprintf(name,"DCL$PATH;%d", i); | |
6b88bc9c GS |
63 | svp = hv_fetch(GvHVn(PL_envgv), name, strlen(name), FALSE); |
64 | if (!svp || *svp == &PL_sv_undef) | |
1e422769 | 65 | break; |
66 | if (SvTAINTED(*svp)) { | |
61bb5906 | 67 | dTHR; |
1e422769 | 68 | TAINT; |
69 | taint_proper("Insecure %s%s", "$ENV{DCL$PATH}"); | |
70 | } | |
71 | if ((mg = mg_find(*svp, 'e')) && MgTAINTEDDIR(mg)) { | |
61bb5906 | 72 | dTHR; |
1e422769 | 73 | TAINT; |
74 | taint_proper("Insecure directory in %s%s", "$ENV{DCL$PATH}"); | |
75 | } | |
76 | i++; | |
77 | } | |
82f1aded | 78 | } |
1e422769 | 79 | #endif /* VMS */ |
79072805 | 80 | |
3280af22 | 81 | svp = hv_fetch(GvHVn(PL_envgv),"PATH",4,FALSE); |
1e422769 | 82 | if (svp && *svp) { |
83 | if (SvTAINTED(*svp)) { | |
aeea060c | 84 | dTHR; |
1e422769 | 85 | TAINT; |
bbce6d69 | 86 | taint_proper("Insecure %s%s", "$ENV{PATH}"); |
1e422769 | 87 | } |
88 | if ((mg = mg_find(*svp, 'e')) && MgTAINTEDDIR(mg)) { | |
aeea060c | 89 | dTHR; |
1e422769 | 90 | TAINT; |
91 | taint_proper("Insecure directory in %s%s", "$ENV{PATH}"); | |
92 | } | |
79072805 | 93 | } |
79072805 | 94 | |
c90c0ff4 | 95 | #ifndef VMS |
96 | /* tainted $TERM is okay if it contains no metachars */ | |
3280af22 | 97 | svp = hv_fetch(GvHVn(PL_envgv),"TERM",4,FALSE); |
c90c0ff4 | 98 | if (svp && *svp && SvTAINTED(*svp)) { |
aeea060c | 99 | dTHR; /* just for taint */ |
2d8e6c8d | 100 | STRLEN n_a; |
3280af22 | 101 | bool was_tainted = PL_tainted; |
2d8e6c8d GS |
102 | char *t = SvPV(*svp, n_a); |
103 | char *e = t + n_a; | |
3280af22 | 104 | PL_tainted = was_tainted; |
c90c0ff4 | 105 | if (t < e && isALNUM(*t)) |
106 | t++; | |
107 | while (t < e && (isALNUM(*t) || *t == '-' || *t == ':')) | |
108 | t++; | |
109 | if (t < e) { | |
110 | TAINT; | |
111 | taint_proper("Insecure $ENV{%s}%s", "TERM"); | |
112 | } | |
113 | } | |
114 | #endif /* !VMS */ | |
115 | ||
7bac28a0 | 116 | for (e = misc_env; *e; e++) { |
3280af22 NIS |
117 | svp = hv_fetch(GvHVn(PL_envgv), *e, strlen(*e), FALSE); |
118 | if (svp && *svp != &PL_sv_undef && SvTAINTED(*svp)) { | |
aeea060c | 119 | dTHR; /* just for taint */ |
7bac28a0 | 120 | TAINT; |
121 | taint_proper("Insecure $ENV{%s}%s", *e); | |
122 | } | |
bbce6d69 | 123 | } |
124 | } |