Ubuntu Security Notice USN-2713-1
17th August, 2015
linux vulnerabilities
A security issue affects these releases of Ubuntu and its
derivatives:
- Ubuntu 12.04 LTS
Summary
Several security issues were fixed in the kernel.
Software description
- linux
– Linux kernel
Details
Marcelo Ricardo Leitner discovered a race condition in the Linux kernel’s
SCTP address configuration lists when using Address Configuration Change
(ASCONF) options on a socket. An unprivileged local user could exploit this
flaw to cause a denial of service (system crash). (CVE-2015-3212)
A flaw was discovered in how the Linux kernel handles invalid UDP
checksums. A remote attacker could exploit this flaw to cause a denial of
service using a flood of UDP packets with invalid checksums.
(CVE-2015-5364)
A flaw was discovered in how the Linux kernel handles invalid UDP
checksums. A remote attacker can cause a denial of service against
applications that use epoll by injecting a single packet with an invalid
checksum. (CVE-2015-5366)
Update instructions
The problem can be corrected by updating your system to the following
package version:
- Ubuntu 12.04 LTS:
-
linux-image-3.2.0-89-highbank
3.2.0-89.127
-
linux-image-3.2.0-89-generic-pae
3.2.0-89.127
-
linux-image-3.2.0-89-powerpc64-smp
3.2.0-89.127
-
linux-image-3.2.0-89-omap
3.2.0-89.127
-
linux-image-3.2.0-89-generic
3.2.0-89.127
-
linux-image-3.2.0-89-powerpc-smp
3.2.0-89.127
-
linux-image-3.2.0-89-virtual
3.2.0-89.127
To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.
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.