1 files changed, 57 insertions, 0 deletions
diff --git a/debian/patches/60_check-null-cn.patch b/debian/patches/60_check-null-cn.patch
new file mode 100644
index 0000000..fdab45c
--- /dev/null
+++ b/debian/patches/60_check-null-cn.patch
@@ -0,0 +1,57 @@
+Description: Check for null bytes in CN/subjAltName
+Origin: http://www.openwall.com/lists/oss-security/2010/06/14/4
+Author: Ludwig Nussel <ludwig.nussel@suse.de>
+Bug-Debian: http://bugs.debian.org/587445
+
+--- w3m-0.5.2.orig/istream.c
++++ w3m-0.5.2/istream.c
+@@ -447,8 +447,17 @@ ssl_check_cert_ident(X509 * x, char *hos
+ 
+ 		    if (!seen_dnsname)
+ 			seen_dnsname = Strnew();
++		    /* replace \0 to make full string visible to user */
++		    if (sl != strlen(sn)) {
++			int i;
++			for (i = 0; i < sl; ++i) {
++			    if (!sn[i])
++				sn[i] = '!';
++			}
++		    }
+ 		    Strcat_m_charp(seen_dnsname, sn, " ", NULL);
+-		    if (ssl_match_cert_ident(sn, sl, hostname))
++		    if (sl == strlen(sn) /* catch \0 in SAN */
++			&& ssl_match_cert_ident(sn, sl, hostname))
+ 			break;
+ 		}
+ 	    }
+@@ -466,16 +475,27 @@ ssl_check_cert_ident(X509 * x, char *hos
+     if (match_ident == FALSE && ret == NULL) {
+ 	X509_NAME *xn;
+ 	char buf[2048];
++	int slen;
+ 
+ 	xn = X509_get_subject_name(x);
+ 
+-	if (X509_NAME_get_text_by_NID(xn, NID_commonName,
+-				      buf, sizeof(buf)) == -1)
++	slen = X509_NAME_get_text_by_NID(xn, NID_commonName, buf, sizeof(buf));
++	if ( slen == -1)
+ 	    /* FIXME: gettextize? */
+ 	    ret = Strnew_charp("Unable to get common name from peer cert");
+-	else if (!ssl_match_cert_ident(buf, strlen(buf), hostname))
++	else if (slen != strlen(buf)
++		|| !ssl_match_cert_ident(buf, strlen(buf), hostname)) {
++	    /* replace \0 to make full string visible to user */
++	    if (slen != strlen(buf)) {
++		int i;
++		for (i = 0; i < slen; ++i) {
++		    if (!buf[i])
++			buf[i] = '!';
++		}
++	    }
+ 	    /* FIXME: gettextize? */
+ 	    ret = Sprintf("Bad cert ident %s from %s", buf, hostname);
++	}
+ 	else
+ 	    match_ident = TRUE;
+     }