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Security fix.

This commit is contained in:
Ben Laurie 2001-12-20 12:18:08 +00:00
parent d78e52987e
commit 7c517a04b1
2 changed files with 20 additions and 22 deletions
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3
CHANGES
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@ -12,6 +12,9 @@
*) applies to 0.9.6a/0.9.6b/0.9.6c and 0.9.7
+) applies to 0.9.7 only
+) SECURITY: remove unsafe setjmp/signal interaction from ui_openssl.c.
[Ben Laurie and Theo de Raadt]
*) Fix BN_rand_range bug pointed out by Dominikus Scherkl
<Dominikus.Scherkl@biodata.com>. (The previous implementation
worked incorrectly for those cases where range = 10..._2 and

39
crypto/ui/ui_openssl.c
View File

@ -148,7 +148,6 @@
#include <signal.h>
#include <stdio.h>
#include <string.h>
#include <setjmp.h>
#include <errno.h>
#ifdef OPENSSL_SYS_VMS /* prototypes for sys$whatever */
@ -256,7 +255,6 @@ static struct sigaction savsig[NX509_SIG];
#else
static void (*savsig[NX509_SIG])(int );
#endif
static jmp_buf save;
#ifdef OPENSSL_SYS_VMS
static struct IOSB iosb;
@ -374,6 +372,8 @@ static void read_till_nl(FILE *in)
} while (strchr(buf,'\n') == NULL);
}
static sig_atomic_t intr_signal;
static int read_string_inner(UI *ui, UI_STRING *uis, int echo, int strip_nl)
{
static int ps;
@ -383,29 +383,31 @@ static int read_string_inner(UI *ui, UI_STRING *uis, int echo, int strip_nl)
char *p;
#ifndef OPENSSL_SYS_WIN16
if ((ok = setjmp(save)))
{
if (ok == 1) ok=0;
goto error;
}
intr_signal=0;
ok=0;
ps=0;
pushsig();
ps=1;
if (!echo) noecho_console(ui);
if (!echo && !noecho_console(ui))
goto error;
ps=2;
result[0]='\0';
#ifdef OPENSSL_SYS_MSDOS
if (!echo)
{
noecho_fgets(result,maxsize,tty_in);
p=result; /* FIXME: noecho_fgets doesn't return errors */
}
else
fgets(result,maxsize,tty_in);
p=fgets(result,maxsize,tty_in);
#else
fgets(result,maxsize,tty_in);
p=fgets(result,maxsize,tty_in);
#endif
if(!p)
goto error;
if (feof(tty_in)) goto error;
if (ferror(tty_in)) goto error;
if ((p=(char *)strchr(result,'\n')) != NULL)
@ -419,9 +421,11 @@ static int read_string_inner(UI *ui, UI_STRING *uis, int echo, int strip_nl)
ok=1;
error:
if (intr_signal == SIGINT)
ok=-1;
if (!echo) fprintf(tty_out,"\n");
if (ps >= 2 && !echo)
echo_console(ui);
if (ps >= 2 && !echo && !echo_console(ui))
ok=0;
if (ps >= 1)
popsig();
@ -602,17 +606,8 @@ static void popsig(void)
static void recsig(int i)
{
switch(i)
{
case SIGINT:
longjmp(save,-1);
break;
default:
break;
intr_signal=i;
}
longjmp(save,1);
}
/* Internal functions specific for Windows */
#if defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_WIN16)