[Ksplice][Ubuntu-20.10-Updates] New Ksplice updates for Ubuntu 20.10 Groovy (USN-4917-1)
Oracle Ksplice
ksplice-support_ww at oracle.com
Wed Apr 21 04:10:18 PDT 2021
Synopsis: USN-4917-1 can now be patched using Ksplice
CVEs: CVE-2021-29154 CVE-2021-3492 CVE-2021-3493
Systems running Ubuntu 20.10 Groovy can now use Ksplice to patch
against the latest Ubuntu Security Notice, USN-4917-1.
INSTALLING THE UPDATES
We recommend that all users of Ksplice Uptrack running Ubuntu 20.10
Groovy install these updates.
On systems that have "autoinstall = yes" in /etc/uptrack/uptrack.conf,
these updates will be installed automatically and you do not need to
take any action.
Alternatively, you can install these updates by running:
# /usr/sbin/uptrack-upgrade -y
DESCRIPTION
* CVE-2021-3492: Code execution in ioctls of ShiftFS file system.
Bad error handling in ioctls of the shiftfs file system could lead to
memory leaks and incorrect return codes from ioctl calls. A local
attacker could use this flaw to cause a denial-of-service by memory
exhaustion or execute arbitrary code.
* CVE-2021-29154: Code execution in eBPF JIT compiler.
Improper computation validation of branch displacements in eBPF JIT
compiler could lead to memory corruption. A local attacker with
the ability to insert eBPF instructions could use this flaw to cause
a denial-of-service or possibly execute arbitrary code.
* CVE-2021-3493: Elevation of privileges in overlayfs file system.
A flaw in overlayfs file system implementation could result in failure
to properly validate the application of file system capabilities with
respect to user namespaces. A local attacker could use this flaw to gain
elevated privileges.
SUPPORT
Ksplice support is available at ksplice-support_ww at oracle.com.
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