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AUSCERT External Security Bulletin Redistribution
ESB-2021.1569.2
USN-4937-1: GNOME Autoar vulnerability
8 June 2021
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AusCERT Security Bulletin Summary
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Product: GNOME Autoar
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Overwrite Arbitrary Files — Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2021-28650
Reference: ESB-2021.0820
ESB-2021.0755
Original Bulletin:
https://ubuntu.com/security/notices/USN-4937-1
https://ubuntu.com/security/notices/USN-4937-2
Comment: This bulletin contains two (2) Ubuntu security advisories.
Revision History: June 8 2021: Vendor added regression update as a second advisory.
May 7 2021: Initial Release
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USN-4937-1: GNOME Autoar vulnerability
06 May 2021
GNOME Autoar could be made to overwrite files.
Releases
o Ubuntu 20.10
o Ubuntu 20.04 LTS
o Ubuntu 18.04 LTS
Packages
o gnome-autoar – Archive integration support for GNOME
Details
Ondrej Holy discovered that GNOME Autoar could extract files outside of the
intended directory. If a user were tricked into extracting a specially
crafted archive, a remote attacker could create files in arbitrary
locations, possibly leading to code execution.
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 20.10
o libgnome-autoar-gtk-0-0 – 0.2.4-2ubuntu0.3
o libgnome-autoar-0-0 – 0.2.4-2ubuntu0.3
Ubuntu 20.04
o libgnome-autoar-gtk-0-0 – 0.2.3-2ubuntu0.3
o libgnome-autoar-0-0 – 0.2.3-2ubuntu0.3
Ubuntu 18.04
o libgnome-autoar-gtk-0-0 – 0.2.3-1ubuntu0.3
o libgnome-autoar-0-0 – 0.2.3-1ubuntu0.3
After a standard system update you need to restart your session to make all
the necessary changes.
References
o CVE-2021-28650
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USN-4937-2: GNOME Autoar regression
07 June 2021
USN-4937-1 introduced a regression in GNOME Autoar.
Releases
o Ubuntu 21.04
o Ubuntu 20.10
o Ubuntu 20.04 LTS
o Ubuntu 18.04 LTS
Packages
o gnome-autoar – Archive integration support for GNOME
Details
USN-4937-1 fixed a vulnerability in GNOME Autoar. The update caused a
regression when extracting certain archives. This update fixes the problem.
Original advisory details:
Ondrej Holy discovered that GNOME Autoar could extract files outside of the
intended directory. If a user were tricked into extracting a specially
crafted archive, a remote attacker could create files in arbitrary
locations, possibly leading to code execution.
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 21.04
o libgnome-autoar-gtk-0-0 – 0.3.1-1ubuntu0.1
o libgnome-autoar-0-0 – 0.3.1-1ubuntu0.1
Ubuntu 20.10
o libgnome-autoar-gtk-0-0 – 0.2.4-2ubuntu0.4
o libgnome-autoar-0-0 – 0.2.4-2ubuntu0.4
Ubuntu 20.04
o libgnome-autoar-gtk-0-0 – 0.2.3-2ubuntu0.4
o libgnome-autoar-0-0 – 0.2.3-2ubuntu0.4
Ubuntu 18.04
o libgnome-autoar-gtk-0-0 – 0.2.3-1ubuntu0.4
o libgnome-autoar-0-0 – 0.2.3-1ubuntu0.4
After a standard system update you need to restart your session to make all
the necessary changes.
References
o https://launchpad.net/bugs/1929304
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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
over its content. The decision to follow or act on information or advice
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NOTE: This is only the original release of the security bulletin. It may
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Contact information for the authors of the original document is included
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Previous advisories and external security bulletins can be retrieved from:
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===========================================================================
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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