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 | |
79072805 | 11 | taint_proper(f, s) |
71be2cbc | 12 | const char *f; |
79072805 LW |
13 | char *s; |
14 | { | |
bbce6d69 | 15 | char *ug; |
16 | ||
1e422769 | 17 | DEBUG_u(PerlIO_printf(PerlIO_stderr(), |
18 | "%s %d %d %d\n", s, tainted, uid, euid)); | |
19 | ||
bbce6d69 | 20 | if (tainted) { |
bbce6d69 | 21 | if (euid != uid) |
22 | ug = " while running setuid"; | |
23 | else if (egid != gid) | |
24 | ug = " while running setgid"; | |
25 | else | |
26 | ug = " while running with -T switch"; | |
27 | if (!unsafe) | |
28 | croak(f, s, ug); | |
29 | else if (dowarn) | |
30 | warn(f, s, ug); | |
79072805 LW |
31 | } |
32 | } | |
33 | ||
34 | void | |
35 | taint_env() | |
36 | { | |
37 | SV** svp; | |
7bac28a0 | 38 | MAGIC* mg; |
39 | char** e; | |
40 | static char* misc_env[] = { | |
41 | "IFS", /* most shells' inter-field separators */ | |
c90c0ff4 | 42 | "CDPATH", /* ksh dain bramage #1 */ |
43 | "ENV", /* ksh dain bramage #2 */ | |
44 | "BASH_ENV", /* bash dain bramage -- I guess it's contagious */ | |
7bac28a0 | 45 | NULL |
46 | }; | |
1e422769 | 47 | |
48 | #ifdef VMS | |
49 | int i = 0; | |
0dc443ab | 50 | char name[10 + TYPE_DIGITS(int)] = "DCL$PATH"; |
1e422769 | 51 | |
52 | while (1) { | |
53 | if (i) | |
54 | (void)sprintf(name,"DCL$PATH;%d", i); | |
55 | svp = hv_fetch(GvHVn(envgv), name, strlen(name), FALSE); | |
56 | if (!svp || *svp == &sv_undef) | |
57 | break; | |
58 | if (SvTAINTED(*svp)) { | |
59 | TAINT; | |
60 | taint_proper("Insecure %s%s", "$ENV{DCL$PATH}"); | |
61 | } | |
62 | if ((mg = mg_find(*svp, 'e')) && MgTAINTEDDIR(mg)) { | |
63 | TAINT; | |
64 | taint_proper("Insecure directory in %s%s", "$ENV{DCL$PATH}"); | |
65 | } | |
66 | i++; | |
67 | } | |
68 | #endif /* VMS */ | |
79072805 | 69 | |
bbce6d69 | 70 | svp = hv_fetch(GvHVn(envgv),"PATH",4,FALSE); |
1e422769 | 71 | if (svp && *svp) { |
72 | if (SvTAINTED(*svp)) { | |
73 | TAINT; | |
bbce6d69 | 74 | taint_proper("Insecure %s%s", "$ENV{PATH}"); |
1e422769 | 75 | } |
76 | if ((mg = mg_find(*svp, 'e')) && MgTAINTEDDIR(mg)) { | |
77 | TAINT; | |
78 | taint_proper("Insecure directory in %s%s", "$ENV{PATH}"); | |
79 | } | |
79072805 | 80 | } |
79072805 | 81 | |
c90c0ff4 | 82 | #ifndef VMS |
83 | /* tainted $TERM is okay if it contains no metachars */ | |
84 | svp = hv_fetch(GvHVn(envgv),"TERM",4,FALSE); | |
85 | if (svp && *svp && SvTAINTED(*svp)) { | |
86 | bool was_tainted = tainted; | |
87 | char *t = SvPV(*svp, na); | |
88 | char *e = t + na; | |
89 | tainted = was_tainted; | |
90 | if (t < e && isALNUM(*t)) | |
91 | t++; | |
92 | while (t < e && (isALNUM(*t) || *t == '-' || *t == ':')) | |
93 | t++; | |
94 | if (t < e) { | |
95 | TAINT; | |
96 | taint_proper("Insecure $ENV{%s}%s", "TERM"); | |
97 | } | |
98 | } | |
99 | #endif /* !VMS */ | |
100 | ||
7bac28a0 | 101 | for (e = misc_env; *e; e++) { |
102 | svp = hv_fetch(GvHVn(envgv), *e, strlen(*e), FALSE); | |
103 | if (svp && *svp != &sv_undef && SvTAINTED(*svp)) { | |
104 | TAINT; | |
105 | taint_proper("Insecure $ENV{%s}%s", *e); | |
106 | } | |
bbce6d69 | 107 | } |
108 | } |