(Mandrake Issues Fix for x86_64) Linux Kernel do_mremap() Fails to Check do_munmap() Return Values, Allowing a Local User to Gain Root Privileges
|
|
SecurityTracker Alert ID: 1009215
|
|
CVE Reference: CAN-2004-0077
(Links to External Site)
|
Date: Feb 26 2004
|
Impact: Execution of arbitrary code via local system, Root access via local system
|
Fix Available: Yes
Vendor Confirmed: Yes
|
Version(s): Corporate Server 2.1
|
Description: Another vulnerability was reported in the Linux kernel do_mremap() function. A local user can execute arbitrary code with root privileges.
Paul Starzetz discovered and reported that there is a missing return value check within the mremap(2) system call.
When resizing
or moving virtual memory areas, the function reportedly does not test the return value of the do_munmap() function. Cases where
the function fails (for example, due to the number of virtual memory areas being exceeded by the calling process) will not be properly
detected, according to the report. As a result, the kernel may move memory belonging to one process into memory space that is allocated
to another process.
Some other calls to the do_munmap() function are also not checked, the report said.
A local user can gain
root privileges on the target system.
The original advisory is available at:
http://isec.pl/vulnerabilities/isec-0014-mremap-unmap.txt
|
Impact: A local user can gain root privileges on the target system.
|
Solution: Mandrake has released a fix.
Corporate Server 2.1/x86_64:
7cb10d389a3676af5467cde13aeeffc5 x86_64/corporate/2.1/RPMS/kernel-2.4.19.39mdk-1-1mdk.x86_64.rpm
aa90188586bec669ee2dd4c21849ef63 x86_64/corporate/2.1/RPMS/kernel-secure-2.4.19.39mdk-1-1mdk.x86_64.rpm
29a349a070109e5452d56e85d636fe73
x86_64/corporate/2.1/RPMS/kernel-smp-2.4.19.39mdk-1-1mdk.x86_64.rpm
cb2af78f251c5665f4cd9e7ecc3faff1 x86_64/corporate/2.1/RPMS/kernel-source-2.4.19-39mdk.x86_64.rpm
4e3c46ba37b6180670c79ba50b23b9b4 x86_64/corporate/2.1/SRPMS/kernel-2.4.19.39mdk-1-1mdk.src.rpm
|
Vendor URL: www.kernel.org/ (Links to External Site)
|
Cause: Boundary error
|
Underlying OS: Linux (Mandrake)
|
Reported By: Mandrake Linux Security Team <security@linux-mandrake.com>
|
Message History:
This archive entry is a follow-up to the message listed below.
|
Source Message Contents
|
Date: 26 Feb 2004 00:42:34 -0000
From: Mandrake Linux Security Team <security@linux-mandrake.com>
Subject: MDKSA-2004:015-1 - Updated x86_64 kernel packages fix multiple vulnerabilities
|
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
_______________________________________________________________________
Mandrakelinux Security Update Advisory
_______________________________________________________________________
Package name: kernel
Advisory ID: MDKSA-2004:015-1
Date: February 25th, 2004
Original Advisory Date: February 24th, 2004
Affected versions: Corporate Server 2.1
______________________________________________________________________
Problem Description:
Paul Staretz discovered a flaw in return value checking in the
mremap() function in the Linux kernel, versions 2.4.24 and previous
that could allow a local user to obtain root privileges.
A vulnerability was found in the R128 DRI driver by Alan Cox. This
could allow local privilege escalation.
A flaw in the ncp_lookup() function in the ncpfs code (which is used
to mount NetWare volumes or print to NetWare printers) was found by
Arjen van de Ven that could allow local privilege escalation.
The Vicam USB driver in Linux kernel versions prior to 2.4.25 does
not use the copy_from_user function to access userspace, which crosses
security boundaries. This problem does not affect the Mandrake Linux
9.2 kernel.
Additionally, a ptrace hole that only affects the amd64/x86_64
platform has been corrected.
The provided packages are patched to fix these vulnerabilities. All
users are encouraged to upgrade to these updated kernels.
To update your kernel, please follow the directions located at:
http://www.mandrakesecure.net/en/kernelupdate.php
Update:
Kernels for Corporate Server 2.1/x86_64 are now available.
_______________________________________________________________________
References:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0003
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0010
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0075
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0077
______________________________________________________________________
Updated Packages:
Corporate Server 2.1/x86_64:
7cb10d389a3676af5467cde13aeeffc5 x86_64/corporate/2.1/RPMS/kernel-2.4.19.39mdk-1-1mdk.x86_64.rpm
aa90188586bec669ee2dd4c21849ef63 x86_64/corporate/2.1/RPMS/kernel-secure-2.4.19.39mdk-1-1mdk.x86_64
.rpm
29a349a070109e5452d56e85d636fe73 x86_64/corporate/2.1/RPMS/kernel-smp-2.4.19.39mdk-1-1mdk.x86_64.rp
m
cb2af78f251c5665f4cd9e7ecc3faff1 x86_64/corporate/2.1/RPMS/kernel-source-2.4.19-39mdk.x86_64.rpm
4e3c46ba37b6180670c79ba50b23b9b4 x86_64/corporate/2.1/SRPMS/kernel-2.4.19.39mdk-1-1mdk.src.rpm
_______________________________________________________________________
To upgrade automatically use MandrakeUpdate or urpmi. The verification
of md5 checksums and GPG signatures is performed automatically for you.
A list of FTP mirrors can be obtained from:
http://www.mandrakesecure.net/en/ftp.php
All packages are signed by Mandrakesoft for security. You can obtain
the GPG public key of the Mandrakelinux Security Team by executing:
gpg --recv-keys --keyserver www.mandrakesecure.net 0x22458A98
Please be aware that sometimes it takes the mirrors a few hours to
update.
You can view other update advisories for Mandrakelinux at:
http://www.mandrakesecure.net/en/advisories/
Mandrakesoft has several security-related mailing list services that
anyone can subscribe to. Information on these lists can be obtained by
visiting:
http://www.mandrakesecure.net/en/mlist.php
If you want to report vulnerabilities, please contact
security_linux-mandrake.com
Type Bits/KeyID Date User ID
pub 1024D/22458A98 2000-07-10 Linux Mandrake Security Team
<security linux-mandrake.com>
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.0.7 (GNU/Linux)
iD8DBQFAPUD5mqjQ0CJFipgRAnV8AKDbtOBNQj0HJBynnGAcQlEgT/+KCgCgiYcB
OwaDE76JuUIzwcwUgm4jpZ8=
=Xt4R
-----END PGP SIGNATURE-----
|
|
