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AUSCERT External Security Bulletin Redistribution
ESB-2023.6877
USN-6488-1: strongSwan vulnerability
21 November 2023
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AusCERT Security Bulletin Summary
---------------------------------
Product: strongSwan
Publisher: Ubuntu
Operating System: Ubuntu
Resolution: Patch/Upgrade
CVE Names: CVE-2023-41913
Original Bulletin:
https://ubuntu.com/security/notices/USN-6488-1
Comment: CVSS (Max): None available when published
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USN-6488-1: strongSwan vulnerability
20 November 2023
strongSwan could be made to crash or run programs if it received specially
crafted network traffic.
Releases
o Ubuntu 23.10
o Ubuntu 23.04
o Ubuntu 22.04 LTS
o Ubuntu 20.04 LTS
Packages
o strongswan - IPsec VPN solution
Details
Florian Picca discovered that strongSwan incorrectly handled certain DH
public values. A remote attacker could use this issue to cause strongSwan
to crash, resulting in a denial of service, or possibly execute arbitrary
code.
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 23.10
o libstrongswan - 5.9.11-1ubuntu1.1
o strongswan - 5.9.11-1ubuntu1.1
Ubuntu 23.04
o libstrongswan - 5.9.8-3ubuntu4.1
o strongswan - 5.9.8-3ubuntu4.1
Ubuntu 22.04
o libstrongswan - 5.9.5-2ubuntu2.2
o strongswan - 5.9.5-2ubuntu2.2
Ubuntu 20.04
o libstrongswan - 5.8.2-1ubuntu3.6
o strongswan - 5.8.2-1ubuntu3.6
In general, a standard system update will make all the necessary changes.
References
o CVE-2023-41913
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