ALAS-2012-100

Amazon Linux 1 Security Advisory: ALAS-2012-100
Advisory Release Date: 2012-07-05 16:19 Pacific
Advisory Updated Date: 2014-09-14 16:33 Pacific
Severity: Medium
Issue Overview:

A flaw was found in the way the Linux kernel's Event Poll (epoll) subsystem handled large, nested epoll structures. A local, unprivileged user could use this flaw to cause a denial of service.

A malicious Network File System version 4 (NFSv4) server could return a crafted reply to a GETACL request, causing a denial of service on the client.

The rds_ib_xmit function in net/rds/ib_send.c in the Reliable Datagram Sockets (RDS) protocol implementation in the Linux kernel 3.7.4 and earlier allows local users to cause a denial of service (BUG_ON and kernel panic) by establishing an RDS connection with the source IP address equal to the IPoIB interface's own IP address, as demonstrated by rds-ping.


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-tools-debuginfo-3.2.22-35.60.amzn1.i686
    kernel-headers-3.2.22-35.60.amzn1.i686
    kernel-tools-3.2.22-35.60.amzn1.i686
    kernel-devel-3.2.22-35.60.amzn1.i686
    kernel-debuginfo-3.2.22-35.60.amzn1.i686
    kernel-3.2.22-35.60.amzn1.i686
    kernel-debuginfo-common-i686-3.2.22-35.60.amzn1.i686

noarch:
    kernel-doc-3.2.22-35.60.amzn1.noarch

src:
    kernel-3.2.22-35.60.amzn1.src

x86_64:
    kernel-tools-debuginfo-3.2.22-35.60.amzn1.x86_64
    kernel-tools-3.2.22-35.60.amzn1.x86_64
    kernel-devel-3.2.22-35.60.amzn1.x86_64
    kernel-debuginfo-common-x86_64-3.2.22-35.60.amzn1.x86_64
    kernel-debuginfo-3.2.22-35.60.amzn1.x86_64
    kernel-3.2.22-35.60.amzn1.x86_64
    kernel-headers-3.2.22-35.60.amzn1.x86_64

Additional References

Red Hat: CVE-2011-1083, CVE-2011-4131, CVE-2012-2372

Mitre: CVE-2011-1083, CVE-2011-4131, CVE-2012-2372