—–BEGIN PGP SIGNED MESSAGE—–
Hash: SHA256
===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2023.3896
USN-6217-1: .NET vulnerability
12 July 2023
===========================================================================
AusCERT Security Bulletin Summary
———————————
Product: .NET
Publisher: Ubuntu
Operating System: Ubuntu
Resolution: Patch/Upgrade
CVE Names: CVE-2023-33170
Original Bulletin:
https://ubuntu.com/security/notices/USN-6217-1
Comment: CVSS (Max): 8.1 CVE-2020-27745 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H)
CVSS Source: Ubuntu
Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
– ————————–BEGIN INCLUDED TEXT——————–
USN-6217-1: .NET vulnerability
11 July 2023
The maximum failed attempts security feature for .NET could be bypassed.
Releases
o Ubuntu 23.04
o Ubuntu 22.10
o Ubuntu 22.04 LTS
Packages
o dotnet6 – dotNET CLI tools and runtime
o dotnet7 – dotNET CLI tools and runtime
Details
McKee-Harris, Matt Cotterell, and Jack Moran discovered that .NET did
not properly update account lockout maximum failed attempts. An
attacker could possibly use this issue to bypass the security feature
and attempt to guess more passwords for an account.
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 23.04
o aspnetcore-runtime-6.0 – 6.0.120-0ubuntu1~23.04.1
o dotnet-hostfxr-7.0 – 7.0.109-0ubuntu1~23.04.1
o dotnet-hostfxr-6.0 – 6.0.120-0ubuntu1~23.04.1
o dotnet-host – 6.0.120-0ubuntu1~23.04.1
o aspnetcore-runtime-7.0 – 7.0.109-0ubuntu1~23.04.1
o dotnet-sdk-6.0 – 6.0.120-0ubuntu1~23.04.1
o dotnet-sdk-7.0 – 7.0.109-0ubuntu1~23.04.1
o dotnet6 – 6.0.120-0ubuntu1~23.04.1
o dotnet7 – 7.0.109-0ubuntu1~23.04.1
o dotnet-runtime-7.0 – 7.0.109-0ubuntu1~23.04.1
o dotnet-runtime-6.0 – 6.0.120-0ubuntu1~23.04.1
o dotnet-host-7.0 – 7.0.109-0ubuntu1~23.04.1
Ubuntu 22.10
o aspnetcore-runtime-6.0 – 6.0.120-0ubuntu1~22.10.1
o dotnet-hostfxr-7.0 – 7.0.109-0ubuntu1~22.10.1
o dotnet-hostfxr-6.0 – 6.0.120-0ubuntu1~22.10.1
o dotnet-host – 6.0.120-0ubuntu1~22.10.1
o aspnetcore-runtime-7.0 – 7.0.109-0ubuntu1~22.10.1
o dotnet-sdk-6.0 – 6.0.120-0ubuntu1~22.10.1
o dotnet-sdk-7.0 – 7.0.109-0ubuntu1~22.10.1
o dotnet6 – 6.0.120-0ubuntu1~22.10.1
o dotnet7 – 7.0.109-0ubuntu1~22.10.1
o dotnet-runtime-7.0 – 7.0.109-0ubuntu1~22.10.1
o dotnet-runtime-6.0 – 6.0.120-0ubuntu1~22.10.1
o dotnet-host-7.0 – 7.0.109-0ubuntu1~22.10.1
Ubuntu 22.04
o aspnetcore-runtime-6.0 – 6.0.120-0ubuntu1~22.04.1
o dotnet-hostfxr-7.0 – 7.0.109-0ubuntu1~22.04.1
o dotnet-hostfxr-6.0 – 6.0.120-0ubuntu1~22.04.1
o dotnet-host – 6.0.120-0ubuntu1~22.04.1
o aspnetcore-runtime-7.0 – 7.0.109-0ubuntu1~22.04.1
o dotnet-sdk-6.0 – 6.0.120-0ubuntu1~22.04.1
o dotnet-sdk-7.0 – 7.0.109-0ubuntu1~22.04.1
o dotnet6 – 6.0.120-0ubuntu1~22.04.1
o dotnet7 – 7.0.109-0ubuntu1~22.04.1
o dotnet-runtime-7.0 – 7.0.109-0ubuntu1~22.04.1
o dotnet-runtime-6.0 – 6.0.120-0ubuntu1~22.04.1
o dotnet-host-7.0 – 7.0.109-0ubuntu1~22.04.1
In general, a standard system update will make all the necessary changes.
References
o CVE-2023-33170
– ————————–END INCLUDED TEXT——————–
You have received this e-mail bulletin as a result of your organisation’s
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to [email protected]
and we will forward your request to the appropriate person.
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
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation’s
site policies and procedures. AusCERT takes no responsibility for consequences
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
not be updated when updates to the original are made. If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author’s website to ensure that the information is still current.
Contact information for the authors of the original document is included
in the Security Bulletin above. If you have any questions or need further
information, please contact them directly.
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: [email protected]
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.
===========================================================================
—–BEGIN PGP SIGNATURE—–
Comment: https://auscert.org.au/gpg-key/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=B08r
—–END PGP SIGNATURE—–
Source: Read More
Security Bulletins