ESB-2021.1273 – [UNIX/Linux][Ubuntu] NetworkManager: Denial of service – Existing account

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2021.1273
                 USN-4914-1: NetworkManager vulnerability
                               15 April 2021

===========================================================================

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

Product:           NetworkManager
Publisher:         Ubuntu
Operating System:  Ubuntu
                   UNIX variants (UNIX, Linux, OSX)
Impact/Access:     Denial of Service -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2021-20297  

Original Bulletin: 
   https://ubuntu.com/security/notices/USN-4914-1

Comment: This advisory references vulnerabilities in products which run on 
         platforms other than Ubuntu. It is recommended that administrators 
         running NetworkManager check for an updated version of the software
         for their operating system.

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USN-4914-1: NetworkManager vulnerability
14 April 2021

NetworkManager could be made to crash if it received specially crafted
input.
Releases

  o Ubuntu 20.10

Packages

  o network-manager - Network connection manager

Details

It was discovered that NetworkManager incorrectly handled certain profiles.
A local attacker could possibly use this issue to cause NetworkManager to
crash, resulting in a denial of service.

Update instructions

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

Ubuntu 20.10

  o network-manager - 1.26.2-1ubuntu1.1

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

References

  o CVE-2021-20297

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NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members.  As
AusCERT did not write the document quoted above, AusCERT has had no control
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which may arise from following or acting on information or advice contained in
this security bulletin.

NOTE: This is only the original release of the security bulletin.  It may
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Previous advisories and external security bulletins can be retrieved from:

        https://www.auscert.org.au/bulletins/

===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
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