X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=taint.c;h=cd9e4ec5ca899fc63af43df66ab0527a5ba1c2c6;hb=2ddcc7aa6c936ba8e7a9703319dfd8959bb54574;hp=321c7b805649cb420edd7ec5e7415896333894b7;hpb=0dc443ab240d96700aca2fe15c6e555416114ee7;p=p5sagit%2Fp5-mst-13.2.git

diff --git a/taint.c b/taint.c
index 321c7b8..cd9e4ec 100644
--- a/taint.c
+++ b/taint.c
@@ -35,7 +35,15 @@ void
 taint_env()
 {
     SV** svp;
-    MAGIC *mg;
+    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
+    };
 
 #ifdef VMS
     int i = 0;
@@ -71,9 +79,30 @@ taint_env()
 	}
     }
 
-    svp = hv_fetch(GvHVn(envgv),"IFS",3,FALSE);
-    if (svp && *svp != &sv_undef && SvTAINTED(*svp)) {
-	TAINT;
-	taint_proper("Insecure %s%s", "$ENV{IFS}");
+#ifndef VMS
+    /* tainted $TERM is okay if it contains no metachars */
+    svp = hv_fetch(GvHVn(envgv),"TERM",4,FALSE);
+    if (svp && *svp && SvTAINTED(*svp)) {
+	bool was_tainted = tainted;
+	char *t = SvPV(*svp, na);
+	char *e = t + na;
+	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(envgv), *e, strlen(*e), FALSE);
+	if (svp && *svp != &sv_undef && SvTAINTED(*svp)) {
+	    TAINT;
+	    taint_proper("Insecure $ENV{%s}%s", *e);
+	}
     }
 }