mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-12 14:20:13 +00:00
6bd0e4efcc
__vsyslog_internal did not handle a case where printing a SYSLOG_HEADER containing a long program name failed to update the required buffer size, leading to the allocation and overflow of a too-small buffer on the heap. This commit fixes that. It also adds a new regression test that uses glibc.malloc.check. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org> Reviewed-by: Carlos O'Donell <carlos@redhat.com> Tested-by: Carlos O'Donell <carlos@redhat.com>
40 lines
1.2 KiB
C
40 lines
1.2 KiB
C
/* Test heap buffer overflow in syslog with long __progname (CVE-2023-6246)
|
|
Copyright (C) 2023 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#include <syslog.h>
|
|
#include <string.h>
|
|
|
|
extern char * __progname;
|
|
|
|
static int
|
|
do_test (void)
|
|
{
|
|
char long_progname[2048];
|
|
|
|
memset (long_progname, 'X', sizeof (long_progname) - 1);
|
|
long_progname[sizeof (long_progname) - 1] = '\0';
|
|
|
|
__progname = long_progname;
|
|
|
|
syslog (LOG_INFO, "Hello, World!");
|
|
|
|
return 0;
|
|
}
|
|
|
|
#include <support/test-driver.c>
|