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AUSCERT External Security Bulletin Redistribution
ESB-2019.1576.3
USN-3968: Sudo vulnerabilities
29 September 2020
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AusCERT Security Bulletin Summary
---------------------------------
Product: sudo
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Root Compromise -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2017-1000368 CVE-2016-7076
Reference: ESB-2017.1676
ESB-2017.1577
ESB-2017.1546.2
ESB-2016.2862
Original Bulletin:
https://usn.ubuntu.com/3968-1/
https://usn.ubuntu.com/3968-2/
Comment: This bulletin contains three (3) Ubuntu security advisories.
Revision History: September 29 2020: Added USN-3968-3
May 30 2019: Added USN-3968-2
May 7 2019: Initial Release
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USN-3968-1: Sudo vulnerabilities
6 May 2019
sudo vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
o Ubuntu 16.04 LTS
Summary
Several security issues were fixed in Sudo.
Software Description
o sudo - Provide limited super user privileges to specific users
Details
Florian Weimer discovered that Sudo incorrectly handled the noexec restriction
when used with certain applications. A local attacker could possibly use this
issue to bypass configured restrictions and execute arbitrary commands.
(CVE-2016-7076)
It was discovered that Sudo did not properly parse the contents of /proc/[pid]/
stat when attempting to determine its controlling tty. A local attacker in some
configurations could possibly use this to overwrite any file on the filesystem,
bypassing intended permissions. (CVE-2017-1000368)
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 16.04 LTS
sudo - 1.8.16-0ubuntu1.6
sudo-ldap - 1.8.16-0ubuntu1.6
To update your system, please follow these instructions: https://
wiki.ubuntu.com/Security/Upgrades .
In general, a standard system update will make all the necessary changes.
References
o CVE-2016-7076
o CVE-2017-1000368
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USN-3968-2: Sudo vulnerability
29 May 2019
sudo vulnerability
A security issue affects these releases of Ubuntu and its derivatives:
o Ubuntu 14.04 ESM
Summary
Sudo could be made to overwrite files if it received a specially crafted input.
Software Description
o sudo - Provide limited super user privileges to specific users
Details
USN-3968-1 fixed a vulnerability in Sudo. This update provides the
corresponding update for Ubuntu 14.04 ESM.
Original advisory details:
It was discovered that Sudo did not properly parse the contents of /proc/[pid]/
stat when attempting to determine its controlling tty. A local attacker in some
configurations could possibly use this to overwrite any file on the filesystem,
bypassing intended permissions. (CVE-2017-1000368)
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 14.04 ESM
sudo - 1.8.9p5-1ubuntu1.5+esm1
sudo-ldap - 1.8.9p5-1ubuntu1.5+esm1
To update your system, please follow these instructions: https://
wiki.ubuntu.com/Security/Upgrades .
In general, a standard system update will make all the necessary changes.
References
o USN-3968-1
o CVE-2017-1000368
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SN-3968-3: Sudo vulnerabilities
28 September 2020
Several security issues were fixed in Sudo.
Releases
o Ubuntu 14.04 ESM
Packages
o sudo - Provide limited super user privileges to specific users
Details
USN-3968-1 fixed several vulnerabilities in Sudo. This update provides
the corresponding update for Ubuntu 14.04 ESM.
Original advisory details:
Florian Weimer discovered that Sudo incorrectly handled the noexec
restriction when used with certain applications. A local attacker could
possibly use this issue to bypass configured restrictions and execute
arbitrary commands. (CVE-2016-7076, CVE-2016-7032)
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 14.04
o sudo - 1.8.9p5-1ubuntu1.5+esm5
o sudo-ldap - 1.8.9p5-1ubuntu1.5+esm5
In general, a standard system update will make all the necessary changes.
References
o CVE-2016-7032
o CVE-2016-7076
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