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Kategorie:Red Hat Local Security Checks
Titel:RedHat Security Advisory RHSA-2011:1465
The remote host is missing updates announced in
advisory RHSA-2011:1465.

The kernel packages contain the Linux kernel, the core of any Linux
operating system.

This update fixes the following security issues:

* IPv6 fragment identification value generation could allow a remote
attacker to disrupt a target system's networking, preventing legitimate
users from accessing its services. (CVE-2011-2699, Important)

* A signedness issue was found in the Linux kernel's CIFS (Common Internet
File System) implementation. A malicious CIFS server could send a
specially-crafted response to a directory read request that would result in
a denial of service or privilege escalation on a system that has a CIFS
share mounted. (CVE-2011-3191, Important)

* A flaw was found in the way the Linux kernel handled fragmented IPv6 UDP
datagrams over the bridge with UDP Fragmentation Offload (UFO)
functionality on. A remote attacker could use this flaw to cause a denial
of service. (CVE-2011-4326, Important)

* The way IPv4 and IPv6 protocol sequence numbers and fragment IDs were
generated could allow a man-in-the-middle attacker to inject packets and
possibly hijack connections. Protocol sequence numbers and fragment IDs are
now more random. (CVE-2011-3188, Moderate)

* A buffer overflow flaw was found in the Linux kernel's FUSE (Filesystem
in Userspace) implementation. A local user in the fuse group who has access
to mount a FUSE file system could use this flaw to cause a denial of
service. (CVE-2011-3353, Moderate)

* A flaw was found in the b43 driver in the Linux kernel. If a system had
an active wireless interface that uses the b43 driver, an attacker able to
send a specially-crafted frame to that interface could cause a denial of
service. (CVE-2011-3359, Moderate)

* A flaw was found in the way CIFS shares with DFS referrals at their root
were handled. An attacker on the local network who is able to deploy a
malicious CIFS server could create a CIFS network share that, when mounted,
would cause the client system to crash. (CVE-2011-3363, Moderate)

* A flaw was found in the way the Linux kernel handled VLAN 0 frames with
the priority tag set. When using certain network drivers, an attacker on
the local network could use this flaw to cause a denial of service.
(CVE-2011-3593, Moderate)

* A flaw in the way memory containing security-related data was handled in
tpm_read() could allow a local, unprivileged user to read the results of a
previously run TPM command. (CVE-2011-1162, Low)

* A heap overflow flaw was found in the Linux kernel's EFI GUID Partition
Table (GPT) implementation. A local attacker could use this flaw to cause
a denial of service by mounting a disk that contains specially-crafted
partition tables. (CVE-2011-1577, Low)

* The I/O statistics from the taskstats subsystem could be read without
any restrictions. A local, unprivileged user could use this flaw to gather
confidential information, such as the length of a password used in a
process. (CVE-2011-2494, Low)

* It was found that the perf tool, a part of the Linux kernel's Performance
Events implementation, could load its configuration file from the current
working directory. If a local user with access to the perf tool were
tricked into running perf in a directory that contains a specially-crafted
configuration file, it could cause perf to overwrite arbitrary files and
directories accessible to that user. (CVE-2011-2905, Low)

Red Hat would like to thank Fernando Gont for reporting CVE-2011-2699

Darren Lavender for reporting CVE-2011-3191
Dan Kaminsky for reporting
Yogesh Sharma for reporting CVE-2011-3363
Gideon Naim for
reporting CVE-2011-3593
Peter Huewe for reporting CVE-2011-1162
Warns for reporting CVE-2011-1577
and Vasiliy Kulikov of Openwall for
reporting CVE-2011-2494.

This update also fixes various bugs. Documentation for these changes will
be available shortly from the Technical Notes document linked to in the
References section.

Please note that this update is available via
Red Hat Network. To use Red Hat Network, launch the Red
Hat Update Agent with the following command: up2date

Risk factor : High

Querverweis: Common Vulnerability Exposure (CVE) ID: CVE-2011-1162
BugTraq ID: 50764
Common Vulnerability Exposure (CVE) ID: CVE-2011-1577
BugTraq ID: 47343
Bugtraq: 20110413 [PRE-SA-2011-03] Denial-of-service vulnerability in EFI partition handling code of the Linux kernel (Google Search)
RedHat Security Advisories: RHSA-2011:0833
XForce ISS Database: kernel-guid-dos(66773)
Common Vulnerability Exposure (CVE) ID: CVE-2011-2494
SuSE Security Announcement: SUSE-SU-2012:0554 (Google Search)
Common Vulnerability Exposure (CVE) ID: CVE-2011-2699
Common Vulnerability Exposure (CVE) ID: CVE-2011-2905
Common Vulnerability Exposure (CVE) ID: CVE-2011-3188
HPdes Security Advisory: HPSBGN02970
Common Vulnerability Exposure (CVE) ID: CVE-2011-3191
Common Vulnerability Exposure (CVE) ID: CVE-2011-3353
Common Vulnerability Exposure (CVE) ID: CVE-2011-3359
Common Vulnerability Exposure (CVE) ID: CVE-2011-3363
Common Vulnerability Exposure (CVE) ID: CVE-2011-3593
Common Vulnerability Exposure (CVE) ID: CVE-2011-4326
BugTraq ID: 50751
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