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Ubuntu 14.04 ESM: USN-4889-1 Critical: iSCSI Kernel Problems

ubuntu
Calendar Grey March 24, 2021
Dist Ubuntu Esm H88
Several kernel vulnerabilities identified and resolved in Ubuntu can cause system instability or data leaks. Please update your system immediately.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux: Linux kernel

- linux-lts-xenial: Linux hardware enablement kernel from Xenial for Trusty

Details:

Adam Nichols discovered that heap overflows existed in the iSCSI subsystem

in the Linux kernel. A local attacker could use this to cause a denial of

service (system crash) or possibly execute arbitrary code. (CVE-2021-27365)

Adam Nichols discovered that the iSCSI subsystem in the Linux kernel did

not properly restrict access to iSCSI transport handles. A local attacker

could use this to cause a denial of service or expose sensitive information

(kernel pointer addresses). (CVE-2021-27363)

Adam Nichols discovered that an out-of-bounds read existed in the iSCSI

subsystem in the Linux kernel. A local attacker could use this to cause a

denial of service (system crash) or expose sensitive information (kernel

memory). (CVE-2021-27364)

Topics%20covered

Topics Covered

security advisory critical Ubuntu kernel issue iSCSI

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 14.04 ESM:
  linux-image-3.13.0-185-generic  3.13.0-185.236
  linux-image-3.13.0-185-generic-lpae  3.13.0-185.236
  linux-image-3.13.0-185-lowlatency  3.13.0-185.236
  linux-image-4.4.0-206-generic   4.4.0-206.238~14.04.1
  linux-image-4.4.0-206-generic-lpae  4.4.0-206.238~14.04.1
  linux-image-4.4.0-206-lowlatency  4.4.0-206.238~14.04.1
  linux-image-generic             3.13.0.185.194
  linux-image-generic-lpae        3.13.0.185.194
  linux-image-generic-lpae-lts-xenial  4.4.0.206.179
  linux-image-generic-lts-xenial  4.4.0.206.179
  linux-image-generic-pae         3.13.0.185.194
  linux-image-lowlatency          3.13.0.185.194
  linux-image-lowlatency-lts-xenial  4.4.0.206.179
  linux-image-lowlatency-pae      3.13.0.185.194
  linux-image-server              3.13.0.185.194
  linux-image-virtual             3.13.0.185.194
  linux-image-virtual-lts-xenial  4.4.0.206.179

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

https://ubuntu.com/security/notices/USN-4889-1

CVE-2021-27363, CVE-2021-27364, CVE-2021-27365

Severity
critical
Lowest
Low
Medium
High
Critical

March 25, 2021

Topics%20covered

Topics Covered

security advisory critical Ubuntu kernel issue iSCSI

Package Information

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