Red Hat ENTERPRISE LINUX 5.5 - S 2010, Руководство пользователя

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Chapter 1. Package Updates
92
* a flaw was found in the FUSE implementation. When a system is low on memory, fuse_put_request()
could dereference an invalid pointer, possibly leading to a local denial of service or privilege
escalation. (
CVE-2009-4021
598
, Important)
* Tavis Ormandy discovered a deficiency in the fasync_helper() implementation. This could allow a
local, unprivileged user to leverage a use-after-free of locked, asynchronous file descriptors to cause a
denial of service or privilege escalation. (
CVE-2009-4141
599
, Important)
* the Parallels Virtuozzo Containers team reported the RHSA-2009:1243 update introduced two flaws
in the routing implementation. If an attacker was able to cause a large enough number of collisions
in the routing hash table (via specially-crafted packets) for the emergency route flush to trigger, a
deadlock could occur. Secondly, if the kernel routing cache was disabled, an uninitialized pointer
would be left behind after a route lookup, leading to a kernel panic. (
CVE-2009-4272
600
, Important)
* the RHSA-2009:0225 update introduced a rewrite attack flaw in the do_coredump() function. A
local attacker able to guess the file name a process is going to dump its core to, prior to the process
crashing, could use this flaw to append data to the dumped core file. This issue only affects systems
that have "/proc/sys/fs/suid_dumpable" set to 2 (the default value is 0). (
CVE-2006-6304
601
, Moderate)
The fix for
CVE-2006-6304
602
changes the expected behavior: With suid_dumpable set to 2, the core
file will not be recorded if the file already exists. For example, core files will not be overwritten on
subsequent crashes of processes whose core files map to the same name.
* an information leak was found in the Linux kernel. On AMD64 systems, 32-bit processes could
access and read certain 64-bit registers by temporarily switching themselves to 64-bit mode.
(
CVE-2009-2910
603
, Moderate)
* the RHBA-2008:0314 update introduced N_Port ID Virtualization (NPIV) support in the qla2xxx
driver, resulting in two new sysfs pseudo files, "/sys/class/scsi_host/[a qla2xxx host]/vport_create" and
"vport_delete". These two files were world-writable by default, allowing a local user to change SCSI
host attributes. This flaw only affects systems using the qla2xxx driver and NPIV capable hardware.
(
CVE-2009-3556
604
, Moderate)
* permission issues were found in the megaraid_sas driver. The "dbg_lvl" and "poll_mode_io" files on
the sysfs file system ("/sys/") had world-writable permissions. This could allow local, unprivileged users
to change the behavior of the driver. (
CVE-2009-3889
605
,
CVE-2009-3939
606
, Moderate)
* a NULL pointer dereference flaw was found in the firewire-ohci driver used for OHCI compliant IEEE
1394 controllers. A local, unprivileged user with access to /dev/fw* files could issue certain IOCTL
calls, causing a denial of service or privilege escalation. The FireWire modules are blacklisted by
default, and if enabled, only root has access to the files noted above by default. (
CVE-2009-4138
607
,
Moderate)
598
https://www.redhat.com/security/data/cve/CVE-2009-4021.html
599
https://www.redhat.com/security/data/cve/CVE-2009-4141.html
600
https://www.redhat.com/security/data/cve/CVE-2009-4272.html
601
https://www.redhat.com/security/data/cve/CVE-2006-6304.html
602
https://www.redhat.com/security/data/cve/CVE-2006-6304.html
603
https://www.redhat.com/security/data/cve/CVE-2009-2910.html
604
https://www.redhat.com/security/data/cve/CVE-2009-3556.html
605
https://www.redhat.com/security/data/cve/CVE-2009-3889.html
606
https://www.redhat.com/security/data/cve/CVE-2009-3939.html
607
https://www.redhat.com/security/data/cve/CVE-2009-4138.html