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Ubuntu 20.04 LTS: USN-4936-1 Moderate: Thunderbird DoS Issues

ubuntu
Calendar Grey May 6, 2021
Dist Ubuntu Esm H88
Numerous security flaws impacting Thunderbird on Ubuntu necessitate urgent updates to maintain system safety and integrity.
Several security issues were fixed in Thunderbird.

Summary

Several security issues were fixed in Thunderbird.

Software Description:

- thunderbird: Mozilla Open Source mail and newsgroup client

Details:

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)

Topics%20covered

Topics Covered

security advisory moderate denial of service security issue software update code execution DoS Ubuntu Thunderbird private keys

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.

References

https://ubuntu.com/security/notices/USN-4936-1

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

CVE-2021-29950

Severity
important
Lowest
Low
Medium
High
Critical

May 06, 2021

Topics%20covered

Topics Covered

security advisory moderate denial of service security issue software update code execution DoS Ubuntu Thunderbird private keys

Package Information

https://launchpad.net/ubuntu/+source/thunderbird/1:78.8.1+build1-0ubuntu0.20.10.1
https://launchpad.net/ubuntu/+source/thunderbird/1:78.8.1+build1-0ubuntu0.20.04.1

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