==========================================================================
Ubuntu Security Notice USN-2636-1
June 10, 2015
linux-lts-vivid vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 14.04 LTS
Summary:
Several security issues were fixed in the kernel.
Software Description:
– linux-lts-vivid: Linux hardware enablement kernel from Vivid
Details:
Xiong Zhou discovered a bug in the way the EXT4 filesystem handles
fallocate zero range functionality when the page size is greater than the
block size. A local attacker could exploit this flaw to cause a denial of
service (system crash). (CVE-2015-0275)
Wen Xu discovered a use-after-free flaw in the Linux kernel’s ipv4 ping
support. A local user could exploit this flaw to cause a denial of service
(system crash) or gain administrative privileges on the system.
(CVE-2015-3636)
A memory corruption flaw was discovered in the Linux kernel’s scsi
subsystem. A local attacker could potentially exploit this flaw to cause a
denial of service (system crash). (CVE-2015-4036)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 14.04 LTS:
linux-image-3.19.0-20-generic 3.19.0-20.20~14.04.1
linux-image-3.19.0-20-generic-lpae 3.19.0-20.20~14.04.1
linux-image-3.19.0-20-lowlatency 3.19.0-20.20~14.04.1
linux-image-3.19.0-20-powerpc-e500mc 3.19.0-20.20~14.04.1
linux-image-3.19.0-20-powerpc-smp 3.19.0-20.20~14.04.1
linux-image-3.19.0-20-powerpc64-emb 3.19.0-20.20~14.04.1
linux-image-3.19.0-20-powerpc64-smp 3.19.0-20.20~14.04.1
After a standard system update you need to reboot your computer to make
all the necessary changes.
ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed. If
you use linux-restricted-modules, you have to update that package as
well to get modules which work with the new kernel version. Unless you
manually uninstalled the standard kernel metapackages (e.g. linux-generic,
linux-server, linux-powerpc), a standard system upgrade will automatically
perform this as well.
References:
http://www.ubuntu.com/usn/usn-2636-1
CVE-2015-0275, CVE-2015-3636, CVE-2015-4036
Package Information:
https://launchpad.net/ubuntu/+source/linux-lts-vivid/3.19.0-20.20~14.04.1
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==========================================================================
Ubuntu Security Notice USN-2638-1
June 10, 2015
linux vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 15.04
Summary:
Several security issues were fixed in the kernel.
Software Description:
– linux: Linux kernel
Details:
Xiong Zhou discovered a bug in the way the EXT4 filesystem handles
fallocate zero range functionality when the page size is greater than the
block size. A local attacker could exploit this flaw to cause a denial of
service (system crash). (CVE-2015-0275)
Wen Xu discovered a use-after-free flaw in the Linux kernel’s ipv4 ping
support. A local user could exploit this flaw to cause a denial of service
(system crash) or gain administrative privileges on the system.
(CVE-2015-3636)
A memory corruption flaw was discovered in the Linux kernel’s scsi
subsystem. A local attacker could potentially exploit this flaw to cause a
denial of service (system crash). (CVE-2015-4036)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 15.04:
linux-image-3.19.0-20-generic 3.19.0-20.20
linux-image-3.19.0-20-generic-lpae 3.19.0-20.20
linux-image-3.19.0-20-lowlatency 3.19.0-20.20
linux-image-3.19.0-20-powerpc-e500mc 3.19.0-20.20
linux-image-3.19.0-20-powerpc-smp 3.19.0-20.20
linux-image-3.19.0-20-powerpc64-emb 3.19.0-20.20
linux-image-3.19.0-20-powerpc64-smp 3.19.0-20.20
After a standard system update you need to reboot your computer to make
all the necessary changes.
ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed. If
you use linux-restricted-modules, you have to update that package as
well to get modules which work with the new kernel version. Unless you
manually uninstalled the standard kernel metapackages (e.g. linux-generic,
linux-server, linux-powerpc), a standard system upgrade will automatically
perform this as well.
References:
http://www.ubuntu.com/usn/usn-2638-1
CVE-2015-0275, CVE-2015-3636, CVE-2015-4036
Package Information:
https://launchpad.net/ubuntu/+source/linux/3.19.0-20.20
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7e
