ALAS-2011-026


Amazon Linux AMI Security Advisory: ALAS-2011-26
Advisory Release Date: 2014-09-14 15:06 Pacific
Severity: Medium

Issue Overview:

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)


Affected Packages:

kernel


Issue Correction:
Run yum update kernel to update your system. You will need to reboot your system in order for the new kernel to be running.

New Packages:
i686:
    kernel-debuginfo-2.6.35.14-106.49.amzn1.i686
    kernel-headers-2.6.35.14-106.49.amzn1.i686
    perf-2.6.35.14-106.49.amzn1.i686
    kernel-2.6.35.14-106.49.amzn1.i686
    kernel-devel-2.6.35.14-106.49.amzn1.i686
    kernel-debuginfo-common-i686-2.6.35.14-106.49.amzn1.i686

noarch:
    kernel-doc-2.6.35.14-106.49.amzn1.noarch

src:
    kernel-2.6.35.14-106.49.amzn1.src

x86_64:
    kernel-devel-2.6.35.14-106.49.amzn1.x86_64
    kernel-2.6.35.14-106.49.amzn1.x86_64
    kernel-debuginfo-common-x86_64-2.6.35.14-106.49.amzn1.x86_64
    kernel-headers-2.6.35.14-106.49.amzn1.x86_64
    perf-2.6.35.14-106.49.amzn1.x86_64
    kernel-debuginfo-2.6.35.14-106.49.amzn1.x86_64