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Ubuntu 23.04, 22.04 LTS: USN-6488-1 Critical DoS Risk from strongSwan

ubuntu
Calendar Grey November 20, 2023
Dist Ubuntu Esm H88
Severe vulnerability in strongSwan on Ubuntu may lead to system crashes or unauthorized code execution; update advised.
strongSwan could be made to crash or run programs if it received specially crafted network traffic.

Summary

strongSwan could be made to crash or run programs if it received

specially crafted network traffic.

Software Description:

- 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.

Topics%20covered

Topics Covered

security advisory denial of service critical issue network traffic ubuntu strongswan

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 23.10:
   libstrongswan                   5.9.11-1ubuntu1.1
   strongswan                      5.9.11-1ubuntu1.1

Ubuntu 23.04:
   libstrongswan                   5.9.8-3ubuntu4.1
   strongswan                      5.9.8-3ubuntu4.1

Ubuntu 22.04 LTS:
   libstrongswan                   5.9.5-2ubuntu2.2
   strongswan                      5.9.5-2ubuntu2.2

Ubuntu 20.04 LTS:
   libstrongswan                   5.8.2-1ubuntu3.6
   strongswan                      5.8.2-1ubuntu3.6

In general, a standard system update will make all the necessary changes.

References

https://ubuntu.com/security/notices/USN-6488-1

CVE-2023-41913

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-6488-1

Topics%20covered

Topics Covered

security advisory denial of service critical issue network traffic ubuntu strongswan

Package Information

https://launchpad.net/ubuntu/+source/strongswan/5.9.8-3ubuntu4.1
https://launchpad.net/ubuntu/+source/strongswan/5.9.5-2ubuntu2.2
https://launchpad.net/ubuntu/+source/strongswan/5.8.2-1ubuntu3.6

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