Mandrake Linux Security Advisory : kernel (MDKSA-2005:110)

This script is Copyright (C) 2005-2016 Tenable Network Security, Inc.


Synopsis :

The remote Mandrake Linux host is missing one or more security
updates.

Description :

Multiple vulnerabilities in the Linux kernel have been discovered and
fixed in this update. The following CVE names have been fixed in the
LE2005 kernel :

Colin Percival discovered a vulnerability in Intel's Hyper-Threading
technology could allow a local user to use a malicious thread to
create covert channels, monitor the execution of other threads, and
obtain sensitive information such as cryptographic keys via a timing
attack on memory cache misses. This has been corrected by disabling HT
support in all kernels (CVE-2005-0109).

An information leak in the ext2 filesystem code in kernels prior to
2.6.11.6 was found where when a new directory is created, the ext2
block written to disk is not initialized (CVE-2005-0400).

A flaw when freeing a pointer in load_elf_library was found in kernels
prior to 2.6.11.6 that could be abused by a local user to potentially
crash the machine causing a Denial of Service (CVE-2005-0749).

A problem with the Bluetooth kernel stack in kernels 2.4.6 through
2.4.30-rc1 and 2.6 through 2.6.11.5 could be used by a local attacker
to gain root access or crash the machine (CVE-2005-0750).

Paul Starzetz found an integer overflow in the ELF binary format
loader's code dump function in kernels prior to and including
2.4.31-pre1 and 2.6.12-rc4. By creating and executing a specially
crafted ELF executable, a local attacker could exploit this to execute
arbitrary code with root and kernel privileges (CVE-2005-1263).

The drivers for raw devices used the wrong function to pass arguments
to the underlying block device in 2.6.x kernels. This made the kernel
address space accessible to user-space applications allowing any local
user with at least read access to a device in /dev/raw/* (usually only
root) to execute arbitrary code with kernel privileges
(CVE-2005-1264).

The it87 and via686a hardware monitor drivers in kernels prior to
2.6.11.8 and 2.6.12 prior to 2.6.12-rc2 created a sysfs file named
'alarms' with write permissions although they are not designed to be
writable. This allowed a local user to crash the kernel by attempting
to write to these files (CVE-2005-1369).

In addition to the above-noted CVE-2005-0109, CVE-2005-0400,
CVE-2005-0749, CVE-2005-0750, and CVE-2005-1369 fixes, the following
CVE names have been fixed in the 10.1 kernel :

The POSIX Capability Linux Security Module (LSM) for 2.6 kernels up to
and including 2.6.8.1 did not properly handle the credentials of a
process that is launched before the module is loaded, which could be
used by local attackers to gain elevated privileges (CVE-2004-1337).

A flaw in the Linux PPP driver in kernel 2.6.8.1 was found where on
systems allowing remote users to connect to a server via PPP, a remote
client could cause a crash, resulting in a Denial of Service
(CVE-2005-0384).

George Guninski discovered a buffer overflow in the ATM driver in
kernels 2.6.10 and 2.6.11 before 2.6.11-rc4 where the atm_get_addr()
function does not validate its arguments sufficiently which could
allow a local attacker to overwrite large portions of kernel memory by
supplying a negative length argument. This could potentially lead to
the execution of arbitrary code (CVE-2005-0531).

The reiserfs_copy_from_user_to_file_region function in reiserfs/file.c
before kernel 2.6.11, when running on 64-bit architectures, could
allow local users to trigger a buffer overflow as a result of casting
discrepancies between size_t and int data types. This could allow an
attacker to overwrite kernel memory, crash the machine, or potentially
obtain root access (CVE-2005-0532).

A race condition in the Radeon DRI driver in kernel 2.6.8.1 allows a
local user with DRI privileges to execute arbitrary code as root
(CVE-2005-0767).

Access was not restricted to the N_MOUSE discipline for a TTY in
kernels prior to 2.6.11. This could allow local attackers to obtain
elevated privileges by injecting mouse or keyboard events into other
user's sessions (CVE-2005-0839).

Some futex functions in futex.c in 2.6 kernels performed get_user
calls while holding the mmap_sem semaphore, which could allow a local
attacker to cause a deadlock condition in do_page_fault by triggering
get_user faults while another thread is executing mmap or other
functions (CVE-2005-0937).

In addition to the above-noted CVE-2004-1337, CVE-2005-0109,
CVE-2005-0384, CVE-2005-0400, CVE-2005-0531, CVE-2005-0532,
CVE-2005-0749, CVE-2005-0750, CVE-2005-0767, CVE-2005-0839,
CVE-2005-0937, CVE-2005-1263, CVE-2005-1264, and CVE-2005-1369 fixes,
the following CVE names have been fixed in the 10.0/ Corporate 3.0
kernels :

A race condition in the setsid function in kernels before 2.6.8.1
could allow a local attacker to cause a Denial of Service and possibly
access portions of kernel memory related to TTY changes, locking, and
semaphores (CVE-2005-0178).

When forwarding fragmented packets in kernel 2.6.8.1, a hardware
assisted checksum could only be used once which could lead to a Denial
of Service attack or crash by remote users (CVE-2005-0209).

A signedness error in the copy_from_read_buf function in n_tty.c
before kernel 2.6.11 allows local users to read kernel memory via a
negative argument (CVE-2005-0530).

A vulnerability in the fib_seq_start() function allowed a local user
to crash the system by readiung /proc/net/route in a certain way,
causing a Denial of Service (CVE-2005-1041).

A vulnerability in the Direct Rendering Manager (DRM) driver in the
2.6 kernel does not properly check the DMA lock, which could allow
remote attackers or local users to cause a Denial of Service (X Server
crash) and possibly modify the video output (CVE-2004-1056).

Solution :

Update the affected packages.

Risk factor :

High / CVSS Base Score : 7.8
(CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C)

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