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Ubuntu Security Notice USN-5331-2
April 11, 2022

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

- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

Several security issues were fixed in tcpdump.

Software Description:
- tcpdump: command-line network traffic analyzer

Details:

USN-5331-1 fixed several vulnerabilities in tcpdump. This update provides
the corresponding update for Ubuntu 18.04 LTS and Ubuntu 20.04 LTS.


Original advisory details:


It was discovered that tcpdump incorrectly handled certain inputs.
An attacker could possibly use this issue to cause a denial of service,
or possibly execute arbitrary code. (CVE-2018-16301)

It was discovered that tcpdump incorrectly handled certain captured data.
An attacker could possibly use this issue to cause a denial of service.
(CVE-2020-8037)

Update instructions:

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

Ubuntu 20.04 LTS:
tcpdump 4.9.3-4ubuntu0.1

Ubuntu 18.04 LTS:
tcpdump 4.9.3-0ubuntu0.18.04.2

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

References:
https://ubuntu.com/security/notices/USN-5331-2
https://ubuntu.com/security/notices/USN-5331-1
CVE-2018-16301, CVE-2020-8037

Package Information:
https://launchpad.net/ubuntu/+source/tcpdump/4.9.3-4ubuntu0.1
https://launchpad.net/ubuntu/+source/tcpdump/4.9.3-0ubuntu0.18.04.2