Executive Summary

Title libreswan security update
Name DSA-4684 First vendor Publication 2020-05-13
Vendor Debian Last vendor Modification 2020-05-13
Severity (Vendor) N/A Revision 1

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Overall CVSS Score 7.5
Base Score 7.5 Environmental Score 7.5
impact SubScore 3.6 Temporal Score 7.5
Exploitabality Sub Score 3.9
Attack Vector Network Attack Complexity Low
Privileges Required None User Interaction None
Scope Unchanged Confidentiality Impact None
Integrity Impact None Availability Impact High
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:L/Au:N/C:N/I:N/A:P)
Cvss Base Score 5 Attack Range Network
Cvss Impact Score 2.9 Attack Complexity Low
Cvss Expoit Score 10 Authentication None Required
Calculate full CVSS 2.0 Vectors scores


Stephan Zeisberg discovered that the libreswan IPsec implementation could be forced into a crash/restart via a malformed IKEv1 Informational Exchange packet, resulting in denial of service.

For the stable distribution (buster), this problem has been fixed in version 3.27-6+deb10u1.

We recommend that you upgrade your libreswan packages.

For the detailed security status of libreswan please refer to its security tracker page at: https://security-tracker.debian.org/tracker/libreswan

Original Source

Url : http://www.debian.org/security/2020/dsa-4684

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-125 Out-of-bounds Read

CPE : Common Platform Enumeration

Application 14

Alert History

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Date Informations
2020-05-23 13:03:43
  • Multiple Updates
2020-05-13 21:18:00
  • First insertion