Ubuntu Security Notice USN-3324-1
19th June, 2017
linux, linux-meta vulnerabilities
A security issue affects these releases of Ubuntu and its
derivatives:
- Ubuntu 17.04
Summary
Several security issues were fixed in the Linux kernel.
Software description
- linux
- Linux kernel
Details
It was discovered that the stack guard page for processes in the Linux
kernel was not sufficiently large enough to prevent overlapping with the
heap. An attacker could leverage this with another vulnerability to execute
arbitrary code and gain administrative privileges ()
A double free bug was discovered in the IPv4 stack of the Linux kernel. An
attacker could use this to cause a denial of service (system crash).
()
Andrey Konovalov discovered a flaw in the handling of inheritance in the
Linux kernel's IPv6 stack. A local user could exploit this issue to cause a
denial of service or possibly other unspecified problems. ()
It was discovered that the transmission control protocol (tcp) v6 in the
Linux kernel mishandled inheritance. A local attacker could exploit this
issue to cause a denial of service or potentially other unspecified
problems. ()
It was discovered that the IPv6 stack was doing over write consistency
check after the data was actually overwritten. A local attacker could
exploit this flaw to cause a denial of service (system crash).
(
.
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.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.
References
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CVE-2017-9242
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