=========================================================================Ubuntu Security Notice USN-5111-2
October 19, 2021

strongswan vulnerability
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 16.04 ESM
- Ubuntu 14.04 ESM

Summary:

Several security issues were fixed in strongSwan.

Software Description:
- strongswan: IPsec VPN solution

Details:

USN-5111-1 fixed a vulnerability in strongSwan. This update provides
the corresponding update for Ubuntu 14.04 ESM and Ubuntu 16.04 ESM.

Original advisory details:

 It was discovered that strongSwan incorrectly handled replacing
 certificates in the cache. A remote attacker could use this issue to cause
 strongSwan to crash, resulting in a denial of service, or possibly execute
 arbitrary code. (CVE-2021-41991)

Update instructions:

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

Ubuntu 16.04 ESM:
  libstrongswan                   5.3.5-1ubuntu3.8+esm1
  strongswan                      5.3.5-1ubuntu3.8+esm1

Ubuntu 14.04 ESM:
  libstrongswan                   5.1.2-0ubuntu2.11+esm1
  strongswan                      5.1.2-0ubuntu2.11+esm1

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

References:
  https://ubuntu.com/security/notices/USN-5111-2
  https://ubuntu.com/security/notices/USN-5111-1
  CVE-2021-41991

Ubuntu 5111-2: strongSwan vulnerability

October 19, 2021
Several security issues were fixed in strongSwan.

Summary

Update Instructions

The problem can be corrected by updating your system to the following package versions: Ubuntu 16.04 ESM: libstrongswan 5.3.5-1ubuntu3.8+esm1 strongswan 5.3.5-1ubuntu3.8+esm1 Ubuntu 14.04 ESM: libstrongswan 5.1.2-0ubuntu2.11+esm1 strongswan 5.1.2-0ubuntu2.11+esm1 In general, a standard system update will make all the necessary changes.

References

https://ubuntu.com/security/notices/USN-5111-2

https://ubuntu.com/security/notices/USN-5111-1

CVE-2021-41991

Severity
October 19, 2021

Package Information

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