Ubuntu Security Notice USN-4936-1 ≈ Packet Storm

Ubuntu Security Notice USN-4936-1
May 06, 2021

thunderbird vulnerabilities

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

- Ubuntu 20.10
- Ubuntu 20.04 LTS


Several security issues were fixed in Thunderbird.

Software Description:
- thunderbird: Mozilla Open Source mail and newsgroup client


Multiple security issues were discovered in Thunderbird. If a user were
tricked into opening a specially crafted website in a browsing context,
an attacker could potentially exploit these to cause a denial of service,
obtain sensitive information, or execute arbitrary code. (CVE-2021-23968,
CVE-2021-23969, CVE-2021-23973, CVE-2021-23978)

It was discovered that Thunderbird may keep key material in memory in some
circumstances. A local attacker could potentially exploit this to obtain
private keys. (CVE-2021-29950)

Update instructions:

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

Ubuntu 20.10:
thunderbird 1:78.8.1+build1-0ubuntu0.20.10.1

Ubuntu 20.04 LTS:
thunderbird 1:78.8.1+build1-0ubuntu0.20.04.1

After a standard system update you need to restart Thunderbird to make
all the necessary changes.

CVE-2021-23968, CVE-2021-23969, CVE-2021-23973, CVE-2021-23978,

Package Information:



Read more


Pensée du jour :

Ce que l'homme a fait ,

l'homme peut le défaire.


"No secure path in the world"