Executive Summary

Title libpcap vulnerability
Name USN-4221-1 First vendor Publication 2019-12-11
Vendor Ubuntu Last vendor Modification 2019-12-11
Severity (Vendor) N/A Revision N/A

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:L/Au:N/C:N/I:P/A:N)
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


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

- Ubuntu 19.04 - Ubuntu 18.04 LTS - Ubuntu 16.04 LTS - Ubuntu 14.04 ESM


Applications using libpcap could be made to crash if given specially crafted data.

Software Description: - libpcap: Library for for user-level network packet capture


It was discovered that libpcap did not properly validate PHB headers in some situations. An attacker could use this to cause a denial of service (memory exhaustion).

Update instructions:

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

Ubuntu 19.04:
libpcap0.8 1.8.1-6ubuntu1.19.04.1

Ubuntu 18.04 LTS:
libpcap0.8 1.8.1-6ubuntu1.18.04.1

Ubuntu 16.04 LTS:
libpcap0.8 1.7.4-2ubuntu0.1

Ubuntu 14.04 ESM:
libpcap0.8 1.5.3-2ubuntu0.1

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


Package Information:

Original Source

Url : http://www.ubuntu.com/usn/USN-4221-1

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-770 Allocation of Resources Without Limits or Throttling

CPE : Common Platform Enumeration

Application 34

Alert History

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Date Informations
2019-12-11 05:18:56
  • First insertion