Home page logo
/

bugtraq logo Bugtraq mailing list archives

feature Re: pine/pico vt control characters bug
From: gvs () AGMAR RU (GvS One)
Date: Sun, 26 Apr 1998 00:20:36 +0400


_\|/_

On Sat, 25 Apr 1998, Michal Zalewski wrote:

Pico, an editor included with pine 3.96 package, handles vt control
characters (eg. 0x9B) improperly, so it's possible to do almost anything
when normal text file is viewed with pico. Example? Try viewing file
containing only two characters: 0x9B and 0x63... That's not all, pico is
called by pine when you're replying to mail message. Anyone may insert any
control chars (using quoted-printable encoding) to his signature.

Hm... Guessing... Pine: Main Menu -> Setup -> configure, few lines
down...

               [X] Pass-control-characters-as-is
?

... or something like that. Don't you want to try it turned off while
reading such message? ;)

Fix:

--- display.c.orig      Wed Jul 10 18:59:09 1996
+++ display.c   Sat Apr 25 14:23:41 1998
@@ -266,7 +266,7 @@
       }
        while ((vtcol&0x07) != 0);
    }
-    else if (c.c < 0x20 || c.c == 0x7F) {
+    else if (c.c < 0x20 || c.c == 0x7F || c.c == 0x9B) {
       ac.c = '^';
        vtputc(ac);
       ac.c = (c.c ^ 0x40);

(should help, at least in above situation)

sorry to bother you, if I'm wrong and you had turned that feature off.
If so, and pico's control characters passing algorithm is incomplete,
we should fix it to work with termcap/terminfo databases to determine
what the characters are treated to be control.

SY, Seva Gluschenko, just stranger at the Road.

--- IRC: erra
 * Origin: gone to the Internet (gvs () agmar ru) [http://www.agmar.ru/~gvs/]



  By Date           By Thread  

Current thread:
[ Nmap | Sec Tools | Mailing Lists | Site News | About/Contact | Advertising | Privacy ]
AlienVault