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Ubuntu 16.04 ESM: USN-5651-2 Critical: StrongSwan Denial Of Service

ubuntu
Calendar Grey October 3, 2022
Dist Ubuntu Esm H88
The Ubuntu Security Notice USN-5651-2 discusses a vulnerability in strongSwan that could lead to a denial of service when processing maliciously designed certificates.
strongSwan could be made do denial of service if it received a specially crafted certificate.

Summary

strongSwan could be made do denial of service if it received

a specially crafted certificate.

Software Description:

- strongswan: IPsec VPN solution

Details:

USN-5651-1 fixed a vulnerability in strongSwan. This update provides

the corresponding update for Ubuntu 14.04 ESM and Ubuntu 16.04 ESM.

Original advisory details:

Lahav Schlesinger discovered that strongSwan incorrectly handled certain OCSP URIs and

and CRL distribution points (CDP) in certificates. A remote attacker could

possibly use this issue to initiate IKE_SAs and send crafted certificates

that contain URIs pointing to servers under their control, which can lead

to a denial-of-service attack.

Topics%20covered

Topics Covered

security advisory denial of service critical issue ubuntu strongswan

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+esm3
  strongswan                      5.3.5-1ubuntu3.8+esm3

Ubuntu 14.04 ESM:
  libstrongswan                   5.1.2-0ubuntu2.11+esm3
  strongswan                      5.1.2-0ubuntu2.11+esm3

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

References

https://ubuntu.com/security/notices/USN-5651-2

https://ubuntu.com/security/notices/USN-5651-1

CVE-2022-40617

Severity
critical
Lowest
Low
Medium
High
Critical

October 03, 2022

Topics%20covered

Topics Covered

security advisory denial of service critical issue ubuntu strongswan

Package Information

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