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 LW |
7 | #include "EXTERN.h" |
8 | #include "perl.h" | |
9 | ||
10 | void | |
8ac85365 | 11 | taint_proper(const char *f, char *s) |
79072805 | 12 | { |
aeea060c | 13 | dTHR; /* just for taint */ |
bbce6d69 | 14 | char *ug; |
15 | ||
fb73857a | 16 | DEBUG_u(PerlIO_printf(Perl_debug_log, |
3280af22 | 17 | "%s %d %d %d\n", s, PL_tainted, PL_uid, PL_euid)); |
1e422769 | 18 | |
3280af22 | 19 | if (PL_tainted) { |
0c005962 JD |
20 | if (!f) |
21 | f = no_security; | |
3280af22 | 22 | if (PL_euid != PL_uid) |
bbce6d69 | 23 | ug = " while running setuid"; |
3280af22 | 24 | else if (PL_egid != PL_gid) |
bbce6d69 | 25 | ug = " while running setgid"; |
26 | else | |
27 | ug = " while running with -T switch"; | |
3280af22 | 28 | if (!PL_unsafe) |
bbce6d69 | 29 | croak(f, s, ug); |
3280af22 | 30 | else if (PL_dowarn) |
bbce6d69 | 31 | warn(f, s, ug); |
79072805 LW |
32 | } |
33 | } | |
34 | ||
35 | void | |
8ac85365 | 36 | taint_env(void) |
79072805 LW |
37 | { |
38 | SV** svp; | |
7bac28a0 | 39 | MAGIC* mg; |
40 | char** e; | |
41 | static char* misc_env[] = { | |
42 | "IFS", /* most shells' inter-field separators */ | |
c90c0ff4 | 43 | "CDPATH", /* ksh dain bramage #1 */ |
44 | "ENV", /* ksh dain bramage #2 */ | |
45 | "BASH_ENV", /* bash dain bramage -- I guess it's contagious */ | |
7bac28a0 | 46 | NULL |
47 | }; | |
1e422769 | 48 | |
49 | #ifdef VMS | |
50 | int i = 0; | |
0dc443ab | 51 | char name[10 + TYPE_DIGITS(int)] = "DCL$PATH"; |
1e422769 | 52 | |
53 | while (1) { | |
54 | if (i) | |
55 | (void)sprintf(name,"DCL$PATH;%d", i); | |
6b88bc9c GS |
56 | svp = hv_fetch(GvHVn(PL_envgv), name, strlen(name), FALSE); |
57 | if (!svp || *svp == &PL_sv_undef) | |
1e422769 | 58 | break; |
59 | if (SvTAINTED(*svp)) { | |
61bb5906 | 60 | dTHR; |
1e422769 | 61 | TAINT; |
62 | taint_proper("Insecure %s%s", "$ENV{DCL$PATH}"); | |
63 | } | |
64 | if ((mg = mg_find(*svp, 'e')) && MgTAINTEDDIR(mg)) { | |
61bb5906 | 65 | dTHR; |
1e422769 | 66 | TAINT; |
67 | taint_proper("Insecure directory in %s%s", "$ENV{DCL$PATH}"); | |
68 | } | |
69 | i++; | |
70 | } | |
71 | #endif /* VMS */ | |
79072805 | 72 | |
3280af22 | 73 | svp = hv_fetch(GvHVn(PL_envgv),"PATH",4,FALSE); |
1e422769 | 74 | if (svp && *svp) { |
75 | if (SvTAINTED(*svp)) { | |
aeea060c | 76 | dTHR; |
1e422769 | 77 | TAINT; |
bbce6d69 | 78 | taint_proper("Insecure %s%s", "$ENV{PATH}"); |
1e422769 | 79 | } |
80 | if ((mg = mg_find(*svp, 'e')) && MgTAINTEDDIR(mg)) { | |
aeea060c | 81 | dTHR; |
1e422769 | 82 | TAINT; |
83 | taint_proper("Insecure directory in %s%s", "$ENV{PATH}"); | |
84 | } | |
79072805 | 85 | } |
79072805 | 86 | |
c90c0ff4 | 87 | #ifndef VMS |
88 | /* tainted $TERM is okay if it contains no metachars */ | |
3280af22 | 89 | svp = hv_fetch(GvHVn(PL_envgv),"TERM",4,FALSE); |
c90c0ff4 | 90 | if (svp && *svp && SvTAINTED(*svp)) { |
aeea060c | 91 | dTHR; /* just for taint */ |
3280af22 NIS |
92 | bool was_tainted = PL_tainted; |
93 | char *t = SvPV(*svp, PL_na); | |
94 | char *e = t + PL_na; | |
95 | PL_tainted = was_tainted; | |
c90c0ff4 | 96 | if (t < e && isALNUM(*t)) |
97 | t++; | |
98 | while (t < e && (isALNUM(*t) || *t == '-' || *t == ':')) | |
99 | t++; | |
100 | if (t < e) { | |
101 | TAINT; | |
102 | taint_proper("Insecure $ENV{%s}%s", "TERM"); | |
103 | } | |
104 | } | |
105 | #endif /* !VMS */ | |
106 | ||
7bac28a0 | 107 | for (e = misc_env; *e; e++) { |
3280af22 NIS |
108 | svp = hv_fetch(GvHVn(PL_envgv), *e, strlen(*e), FALSE); |
109 | if (svp && *svp != &PL_sv_undef && SvTAINTED(*svp)) { | |
aeea060c | 110 | dTHR; /* just for taint */ |
7bac28a0 | 111 | TAINT; |
112 | taint_proper("Insecure $ENV{%s}%s", *e); | |
113 | } | |
bbce6d69 | 114 | } |
115 | } |