Ubuntu 4936-1: Thunderbird vulnerabilities | LinuxSecurity.com
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Ubuntu Security Notice USN-4936-1
May 06, 2021

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

- Ubuntu 20.10
- Ubuntu 20.04 LTS

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)

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

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

Ubuntu 4936-1: Thunderbird vulnerabilities

May 6, 2021

Summary

A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 20.10 - Ubuntu 20.04 LTS 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)

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
Ubuntu Security Notice USN-4936-1

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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