ESB-2019.0125 - [Linux][Ubuntu] systemd: Multiple vulnerabilities 2019-01-14

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2019.0125
                          systemd vulnerabilities
                              14 January 2019

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           systemd
Publisher:         Ubuntu
Operating System:  Ubuntu
                   Linux variants
Impact/Access:     Root Compromise        -- Remote/Unauthenticated
                   Access Privileged Data -- Remote/Unauthenticated
                   Denial of Service      -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-16866 CVE-2018-16865 CVE-2018-16864

Reference:         ESB-2019.0111

Original Bulletin: 
   http://www.ubuntu.com/usn/usn-3855-1

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Ubuntu Security Notice USN-3855-1
Last Modified: January 11, 2019

Security Bulletin Report:systemd vulnerabilities


A security issue affects these releases of Ubuntu and its derivatives:

- - Ubuntu 18.10
- - Ubuntu 18.04 LTS
- - Ubuntu 16.04 LTS

Summary:

Several security issues were fixed in systemd.

Software Description:
- - systemd: system and service manager

Details:

It was discovered that systemd-journald allocated variable-length buffers=

for certain message fields on the stack. A local attacker could
potentially exploit this to cause a denial of service, or execute
arbitrary code. (CVE-2018-16864)

It was discovered that systemd-journald allocated variable-length arrays
of objects representing message fields on the stack. A local attacker
could potentially exploit this to cause a denial of service, or execute
arbitrary code. (CVE-2018-16865)

An out-of-bounds read was discovered in systemd-journald. A local
attacker could potentially exploit this to obtain sensitive information
and bypass ASLR protections. (CVE-2018-16866)

Update instructions:

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

Ubuntu 18.10:
systemd - 239-7ubuntu10.6

Ubuntu 18.04 LTS:
systemd - 237-3ubuntu10.11

Ubuntu 16.04 LTS:
systemd - 229-4ubuntu21.15

After a standard system update you need to reboot your computer to make
all the necessary changes.

References:
https://usn.ubuntu.com/usn/usn-3855-1
CVE-2018-16864, CVE-2018-16865, CVE-2018-16866

Package Information:
https://launchpad.net/ubuntu/+source/systemd/239-7ubuntu10.6
https://launchpad.net/ubuntu/+source/systemd/237-3ubuntu10.11
https://launchpad.net/ubuntu/+source/systemd/229-4ubuntu21.15

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