mirror of
https://github.com/NixOS/nixpkgs.git
synced 2024-12-23 22:23:15 +00:00
109 lines
3.5 KiB
Diff
109 lines
3.5 KiB
Diff
Description: [CVE-2012-4527] Stack-based buffer overflow with long file names
|
|
.
|
|
A buffer overflow in mcrypt version 2.6.8 and earlier due to long filenames.
|
|
If a user were tricked into attempting to encrypt/decrypt specially crafted
|
|
long filename(s), this flaw would cause a stack-based buffer overflow that
|
|
could potentially lead to arbitrary code execution.
|
|
.
|
|
Note that this is caught by FORTIFY_SOURCE, which makes this a crash-only
|
|
bug on wheezy.
|
|
Author: Attila Bogar, Jean-Michel Vourgère <jmv_deb@nirgal.com>
|
|
Origin: https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2012-4527
|
|
Bug: CVE-2012-4527
|
|
Bug-Debian: http://bugs.debian.org/690924
|
|
Forwarded: no
|
|
Last-Update: 2012-11-01
|
|
Index: mcrypt-2.6.8/src/mcrypt.c
|
|
===================================================================
|
|
--- mcrypt-2.6.8.orig/src/mcrypt.c
|
|
+++ mcrypt-2.6.8/src/mcrypt.c
|
|
@@ -41,4 +41,6 @@
|
|
|
|
+/* Temporary error message can contain one file name and 1k of text */
|
|
+#define ERRWIDTH ((PATH_MAX)+1024)
|
|
-char tmperr[128];
|
|
+char tmperr[ERRWIDTH];
|
|
unsigned int stream_flag = FALSE;
|
|
char *keymode = NULL;
|
|
char *mode = NULL;
|
|
@@ -482,7 +485,7 @@
|
|
#ifdef HAVE_STAT
|
|
if (stream_flag == FALSE) {
|
|
if (is_normal_file(file[i]) == FALSE) {
|
|
- sprintf(tmperr,
|
|
+ snprintf(tmperr, ERRWIDTH,
|
|
_
|
|
("%s: %s is not a regular file. Skipping...\n"),
|
|
program_name, file[i]);
|
|
@@ -501,7 +504,7 @@
|
|
dinfile = file[i];
|
|
if ((isatty(fileno((FILE *) (stdin))) == 1)
|
|
&& (stream_flag == TRUE) && (force == 0)) { /* not a tty */
|
|
- sprintf(tmperr,
|
|
+ snprintf(tmperr, ERRWIDTH,
|
|
_
|
|
("%s: Encrypted data will not be read from a terminal.\n"),
|
|
program_name);
|
|
@@ -520,7 +523,7 @@
|
|
einfile = file[i];
|
|
if ((isatty(fileno((FILE *) (stdout))) == 1)
|
|
&& (stream_flag == TRUE) && (force == 0)) { /* not a tty */
|
|
- sprintf(tmperr,
|
|
+ snprintf(tmperr, ERRWIDTH,
|
|
_
|
|
("%s: Encrypted data will not be written to a terminal.\n"),
|
|
program_name);
|
|
@@ -544,7 +547,7 @@
|
|
strcpy(outfile, einfile);
|
|
/* if file has already the .nc ignore it */
|
|
if (strstr(outfile, ".nc") != NULL) {
|
|
- sprintf(tmperr,
|
|
+ snprintf(tmperr, ERRWIDTH,
|
|
_
|
|
("%s: file %s has the .nc suffix... skipping...\n"),
|
|
program_name, outfile);
|
|
@@ -590,10 +593,10 @@
|
|
|
|
if (x == 0) {
|
|
if (stream_flag == FALSE) {
|
|
- sprintf(tmperr, _("File %s was decrypted.\n"), dinfile);
|
|
+ snprintf(tmperr, ERRWIDTH, _("File %s was decrypted.\n"), dinfile);
|
|
err_warn(tmperr);
|
|
} else {
|
|
- sprintf(tmperr, _("Stdin was decrypted.\n"));
|
|
+ snprintf(tmperr, ERRWIDTH, _("Stdin was decrypted.\n"));
|
|
err_warn(tmperr);
|
|
}
|
|
#ifdef HAVE_STAT
|
|
@@ -610,7 +613,7 @@
|
|
|
|
} else {
|
|
if (stream_flag == FALSE) {
|
|
- sprintf(tmperr,
|
|
+ snprintf(tmperr, ERRWIDTH,
|
|
_
|
|
("File %s was NOT decrypted successfully.\n"),
|
|
dinfile);
|
|
@@ -636,10 +639,10 @@
|
|
|
|
if (x == 0) {
|
|
if (stream_flag == FALSE) {
|
|
- sprintf(tmperr, _("File %s was encrypted.\n"), einfile);
|
|
+ snprintf(tmperr, ERRWIDTH, _("File %s was encrypted.\n"), einfile);
|
|
err_warn(tmperr);
|
|
} else {
|
|
- sprintf(tmperr, _("Stdin was encrypted.\n"));
|
|
+ snprintf(tmperr, ERRWIDTH, _("Stdin was encrypted.\n"));
|
|
err_warn(tmperr);
|
|
}
|
|
#ifdef HAVE_STAT
|
|
@@ -655,7 +658,7 @@
|
|
|
|
} else {
|
|
if (stream_flag == FALSE) {
|
|
- sprintf(tmperr,
|
|
+ snprintf(tmperr, ERRWIDTH,
|
|
_
|
|
("File %s was NOT encrypted successfully.\n"),
|
|
einfile);
|