RedHat: RHSA-2015-1082:01 Important: kernel security update
Summary
The kernel packages contain the Linux kernel, the core of any Linux
operating system.
* A use-after-free flaw was found in the way the Linux kernel's SCTP
implementation handled authentication key reference counting during INIT
collisions. A remote attacker could use this flaw to crash the system or,
potentially, escalate their privileges on the system. (CVE-2015-1421,
Important)
* It was found that the Linux kernel's implementation of vectored pipe read
and write functionality did not take into account the I/O vectors that were
already processed when retrying after a failed atomic access operation,
potentially resulting in memory corruption due to an I/O vector array
overrun. A local, unprivileged user could use this flaw to crash the system
or, potentially, escalate their privileges on the system. (CVE-2015-1805,
Important)
The CVE-2015-1421 issue was discovered by Sun Baoliang of Red Hat, and the
security impact of the CVE-2015-1805 issue was discovered by Red Hat.
All kernel users are advised to upgrade to these updated packages, which
contain backported patches to correct these issues. The system must be
rebooted for this update to take effect.
Summary
Solution
Before applying this update, make sure all previously released errata
relevant to your system have been applied.
For details on how to apply this update, refer to:
https://access.redhat.com/articles/11258
References
https://access.redhat.com/security/cve/CVE-2015-1421 https://access.redhat.com/security/cve/CVE-2015-1805 https://access.redhat.com/security/updates/classification/#important
Package List
Red Hat Enterprise Linux AUS (v. 6.2 server):
Source:
kernel-2.6.32-220.63.2.el6.src.rpm
noarch:
kernel-doc-2.6.32-220.63.2.el6.noarch.rpm
kernel-firmware-2.6.32-220.63.2.el6.noarch.rpm
x86_64:
kernel-2.6.32-220.63.2.el6.x86_64.rpm
kernel-debug-2.6.32-220.63.2.el6.x86_64.rpm
kernel-debug-debuginfo-2.6.32-220.63.2.el6.x86_64.rpm
kernel-debug-devel-2.6.32-220.63.2.el6.x86_64.rpm
kernel-debuginfo-2.6.32-220.63.2.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-220.63.2.el6.x86_64.rpm
kernel-devel-2.6.32-220.63.2.el6.x86_64.rpm
kernel-headers-2.6.32-220.63.2.el6.x86_64.rpm
perf-2.6.32-220.63.2.el6.x86_64.rpm
perf-debuginfo-2.6.32-220.63.2.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-220.63.2.el6.x86_64.rpm
Red Hat Enterprise Linux Server Optional AUS (v. 6.2):
Source:
kernel-2.6.32-220.63.2.el6.src.rpm
x86_64:
kernel-debug-debuginfo-2.6.32-220.63.2.el6.x86_64.rpm
kernel-debuginfo-2.6.32-220.63.2.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-220.63.2.el6.x86_64.rpm
perf-debuginfo-2.6.32-220.63.2.el6.x86_64.rpm
python-perf-2.6.32-220.63.2.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-220.63.2.el6.x86_64.rpm
These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/
Topic
Updated kernel packages that fix two security issues are now available forRed Hat Enterprise Linux 6.2 Advanced Update Support.Red Hat Product Security has rated this update as having Important securityimpact. Common Vulnerability Scoring System (CVSS) base scores, which givedetailed severity ratings, are available for each vulnerability from theCVE links in the References section.
Topic
Relevant Releases Architectures
Red Hat Enterprise Linux AUS (v. 6.2 server) - noarch, x86_64
Red Hat Enterprise Linux Server Optional AUS (v. 6.2) - x86_64
Bugs Fixed
1196581 - CVE-2015-1421 kernel: net: slab corruption from use after free on INIT collisions
1202855 - CVE-2015-1805 kernel: pipe: iovec overrun leading to memory corruption