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Category:Red Hat Local Security Checks
Title:RedHat Security Advisory RHSA-2012:1430
The remote host is missing updates announced in
advisory RHSA-2012:1430.

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

This update fixes the following security issue:

* A flaw was found in the way socket buffers (skb) requiring TSO (TCP
segment offloading) were handled by the sfc driver. If the skb did not fit
within the minimum-size of the transmission queue, the network card could
repeatedly reset itself. A remote attacker could use this flaw to cause a
denial of service. (CVE-2012-3412, Important)

Red Hat would like to thank Ben Hutchings of Solarflare (tm) for reporting
this issue.

This update also fixes the following bugs:

* In the hpet_next_event() function, an interrupt could have occurred
between the read and write of the HPET (High Precision Event Timer) and the
value of HPET_COUNTER was then beyond that being written to the comparator
(HPET_Tn_CMP). Consequently, the timers were overdue for up to several
minutes. Now, a comparison is performed between the value of the counter
and the comparator in the HPET code. If the counter is beyond the
comparator, the -ETIME error code is returned, which fixes this bug.

* Traffic to the NFS server could trigger a kernel oops in the
svc_tcp_clear_pages() function. The source code has been modified, and the
kernel oops no longer occurs in this scenario. (BZ#856104)

* A kernel oops occurred in the nf_nat code when a bogus pointer was
dereferenced in the nf_conn_nat structure. Consequently, if Source Network
Address Translation (SNAT) was performed, incorrect information could be
received by other CTS (Clear to Send) signals. A conntrack entry is now
placed in the source hash after SNAT has been completed, which prevents the
described problems. (BZ#865714)

Users should upgrade to these updated packages, which contain backported
patches to resolve these issues. The system must be rebooted for this
update to take effect.

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

Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2012-3412
RedHat Security Advisories: RHSA-2012:1323
RedHat Security Advisories: RHSA-2012:1324
RedHat Security Advisories: RHSA-2012:1347
RedHat Security Advisories: RHSA-2012:1375
RedHat Security Advisories: RHSA-2012:1401
RedHat Security Advisories: RHSA-2012:1430
SuSE Security Announcement: SUSE-SU-2012:1679 (Google Search)
SuSE Security Announcement: openSUSE-SU-2012:1330 (Google Search)
CopyrightCopyright (c) 2012 E-Soft Inc.

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