SecurityTracker.com Archives - (Mandrake Issues Fix) Linux Kernel do_mremap() Fails to Check do_munmap() Return Values, Allowing a Local User to Gain Root Privileges

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Category: OS (Linux) > Linux Kernel

Vendors: kernel.org

(Mandrake Issues Fix) Linux Kernel do_mremap() Fails to Check do_munmap() Return Values, Allowing a Local User to Gain Root Privileges

SecurityTracker Alert ID: 1009204

CVE Reference: CAN-2004-0077 (Links to External Site)

Date: Feb 25 2004

Impact: Execution of arbitrary code via local system, Root access via local system

Fix Available: Yes Vendor Confirmed: Yes

Version(s): 9.0, 9.1, 9.2, Corporate Server 2.1, Multi Network Firewall 8.2

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.

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.

Feb 18 2004

Linux Kernel do_mremap() Fails to Check do_munmap() Return Values, Allowing a Local User to Gain Root Privileges

Source Message Contents

Date: 24 Feb 2004 16:26:51 -0000
From: Mandrake Linux Security Team <security@linux-mandrake.com>
Subject: MDKSA-2004:015 - Updated kernel packages fix multiple vulnerabilities

 

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

 _______________________________________________________________________

                Mandrake Linux Security Update Advisory
 _______________________________________________________________________

 Package name:           kernel
 Advisory ID:            MDKSA-2004:015
 Date:                   February 24th, 2004

 Affected versions:	 9.0, 9.1, 9.2, Corporate Server 2.1,
			 Multi Network Firewall 8.2
 ______________________________________________________________________

 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
 _______________________________________________________________________

 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:
 8502d31939f4e70ed2bd83d7324ee46a  corporate/2.1/RPMS/kernel-2.4.19.38mdk-1-1mdk.i586.rpm
 dfcf9db165d63227abd1d3c30a9a563f  corporate/2.1/RPMS/kernel-enterprise-2.4.19.38mdk-1-1mdk.i586.rpm
 cf1abd8aefa0974a5d4ac85aef449fd6  corporate/2.1/RPMS/kernel-secure-2.4.19.38mdk-1-1mdk.i586.rpm
 fb84e3fc81e4da3aa178d6d87a5977d3  corporate/2.1/RPMS/kernel-smp-2.4.19.38mdk-1-1mdk.i586.rpm
 70591c2adde3e9ddab653819a385028a  corporate/2.1/RPMS/kernel-source-2.4.19-38mdk.i586.rpm
 649d838c5a687a6183dfb8aa8ec867d0  corporate/2.1/SRPMS/kernel-2.4.19.38mdk-1-1mdk.src.rpm

 Mandrake Linux 9.0:
 8502d31939f4e70ed2bd83d7324ee46a  9.0/RPMS/kernel-2.4.19.38mdk-1-1mdk.i586.rpm
 dfcf9db165d63227abd1d3c30a9a563f  9.0/RPMS/kernel-enterprise-2.4.19.38mdk-1-1mdk.i586.rpm
 cf1abd8aefa0974a5d4ac85aef449fd6  9.0/RPMS/kernel-secure-2.4.19.38mdk-1-1mdk.i586.rpm
 fb84e3fc81e4da3aa178d6d87a5977d3  9.0/RPMS/kernel-smp-2.4.19.38mdk-1-1mdk.i586.rpm
 70591c2adde3e9ddab653819a385028a  9.0/RPMS/kernel-source-2.4.19-38mdk.i586.rpm
 649d838c5a687a6183dfb8aa8ec867d0  9.0/SRPMS/kernel-2.4.19.38mdk-1-1mdk.src.rpm

 Mandrake Linux 9.1:
 d255b6344a898596f38e0fd7835c9b49  9.1/RPMS/kernel-2.4.21.0.28mdk-1-1mdk.i586.rpm
 f96e77bb3de56dd3dd35611ed8d0bb33  9.1/RPMS/kernel-enterprise-2.4.21.0.28mdk-1-1mdk.i586.rpm
 612d11bbf85d8f04be22f514c65a2f4e  9.1/RPMS/kernel-secure-2.4.21.0.28mdk-1-1mdk.i586.rpm
 f39f9f07d2bed27ebc177b7e2b06ad6f  9.1/RPMS/kernel-smp-2.4.21.0.28mdk-1-1mdk.i586.rpm
 b95ccb440b7331aee6219b4483e492ec  9.1/RPMS/kernel-source-2.4.21-0.28mdk.i586.rpm
 392e96352e66f67614666441a38105ef  9.1/SRPMS/kernel-2.4.21.0.28mdk-1-1mdk.src.rpm

 Mandrake Linux 9.1/PPC:
 2ba22a1a3650213c0b153aa9a3e0abc3  ppc/9.1/RPMS/kernel-2.4.21.0.28mdk-1-1mdk.ppc.rpm
 26765a33c0f8b88c382dd9527753d9a3  ppc/9.1/RPMS/kernel-enterprise-2.4.21.0.28mdk-1-1mdk.ppc.rpm
 d2efabbc7c3421c607d1874b2fab008e  ppc/9.1/RPMS/kernel-smp-2.4.21.0.28mdk-1-1mdk.ppc.rpm
 3745b59252ca05572f0f504d983124c9  ppc/9.1/RPMS/kernel-source-2.4.21-0.28mdk.ppc.rpm
 392e96352e66f67614666441a38105ef  ppc/9.1/SRPMS/kernel-2.4.21.0.28mdk-1-1mdk.src.rpm

 Mandrake Linux 9.2:
 5580642b756d2b62c88eba748cc496c0  9.2/RPMS/kernel-2.4.22.28mdk-1-1mdk.i586.rpm
 6bdd2872bb7da3cb2e0347f1fa4e506d  9.2/RPMS/kernel-enterprise-2.4.22.28mdk-1-1mdk.i586.rpm
 8810a5ad13aba7abd1479eada447cf19  9.2/RPMS/kernel-i686-up-4GB-2.4.22.28mdk-1-1mdk.i586.rpm
 d701b8e33edaa18fc181fb35eff8566b  9.2/RPMS/kernel-p3-smp-64GB-2.4.22.28mdk-1-1mdk.i586.rpm
 4bdd98cfcaf38a00f4d9f0f7383d1a75  9.2/RPMS/kernel-secure-2.4.22.28mdk-1-1mdk.i586.rpm
 e9a6c06e8b9de047d46c41715e74dd52  9.2/RPMS/kernel-smp-2.4.22.28mdk-1-1mdk.i586.rpm
 16a2a10e6c046a36c4e6373e4da25836  9.2/RPMS/kernel-source-2.4.22-28mdk.i586.rpm
 e06f5be69fbcdeb3dc8b581c265a511c  9.2/SRPMS/kernel-2.4.22.28mdk-1-1mdk.src.rpm

 Mandrake Linux 9.2/AMD64:
 ced252e4a55290c082729f46e1e74476  amd64/9.2/RPMS/kernel-2.4.22.28mdk-1-1mdk.amd64.rpm
 d563da369abbfa3acb8d8769bfd858a8  amd64/9.2/RPMS/kernel-secure-2.4.22.28mdk-1-1mdk.amd64.rpm
 a3d12632c59eeb7e9d44de68c6f2e3fd  amd64/9.2/RPMS/kernel-smp-2.4.22.28mdk-1-1mdk.amd64.rpm
 63f21edebe2d22ec82f889c9b832ff00  amd64/9.2/RPMS/kernel-source-2.4.22-28mdk.amd64.rpm
 e06f5be69fbcdeb3dc8b581c265a511c  amd64/9.2/SRPMS/kernel-2.4.22.28mdk-1-1mdk.src.rpm

 Multi Network Firewall 8.2:
 8c979e21c7ad91fb87a840d708718b3c  mnf8.2/RPMS/kernel-secure-2.4.19.38mdk-1-1mdk.i586.rpm
 649d838c5a687a6183dfb8aa8ec867d0  mnf8.2/SRPMS/kernel-2.4.19.38mdk-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 Mandrake Linux 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 Mandrake Linux 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>
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