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AUSCERT External Security Bulletin Redistribution
ESB-2023.6875
USN-6489-1: Tang vulnerability
21 November 2023
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AusCERT Security Bulletin Summary
---------------------------------
Product: Tang
Publisher: Ubuntu
Operating System: Ubuntu
Resolution: Patch/Upgrade
CVE Names: CVE-2023-1672
Original Bulletin:
https://ubuntu.com/security/notices/USN-6489-1
Comment: CVSS (Max): 5.3 CVE-2023-1672 (CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N)
CVSS Source: Ubuntu
Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
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USN-6489-1: Tang vulnerability
20 November 2023
Tang could allow unintended access to secret keys.
Releases
o Ubuntu 23.04
o Ubuntu 22.04 LTS
o Ubuntu 20.04 LTS
o Ubuntu 18.04 ESM
Packages
o tang - network-based cryptographic binding server
Details
Brian McDermott discovered that Tang incorrectly handled permissions when
creating/rotating keys. A local attacker could possibly use this issue to
read the keys.
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 23.04
o tang-common - 11-2ubuntu0.1
Ubuntu 22.04
o tang-common - 11-1ubuntu0.1
Ubuntu 20.04
o tang - 7-1ubuntu0.2
Ubuntu 18.04
o tang - 6-1ubuntu0.1~esm1
Available with Ubuntu Pro
In general, a standard system update will make all the necessary changes.
References
o CVE-2023-1672
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