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Ubuntu 20.10 USN-4802-1 Security: Firefox Memory Corruption Issue

ubuntu
Calendar Grey January 20, 2021
Dist Ubuntu Esm H88
Tackling weaknesses in Firefox through Ubuntu Security Notice USN-4702-1 alongside essential upgrades to ensure user safety.
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 in to opening a specially crafted website in a browsing context,

an attacker could potentially exploit these to cause a denial of service,

obtain sensitive information, bypass the CSS sanitizer, or execute

arbitrary code. (CVE-2020-16042, CVE-2020-16044, CVE-2020-26971,

CVE-2020-26973, CVE-2020-26974, CVE-2020-26978, CVE-2020-35113)

It was discovered that the proxy.onRequest API did not catch

view-source URLs. If a user were tricked in to installing an

extension with the proxy permission and opening View Source, an

attacker could potentially exploit this to obtain sensitive

information. (CVE-2020-35111)

A stack overflow was discovered due to incorrect parsing of SMTP server

response codes. An attacker could potentially exploit this to e...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service information leak update critical arbitrary code execution Ubuntu software issue ubuntu thunderbird Thunderbird

Update Instructions

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

Ubuntu 20.10:
  thunderbird                     1:78.6.1+build1-0ubuntu0.20.10.1

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

References

https://ubuntu.com/security/notices/USN-4701-1

CVE-2020-16042, CVE-2020-16044, CVE-2020-26970, CVE-2020-26971,

CVE-2020-26973, CVE-2020-26974, CVE-2020-26978, CVE-2020-35111,

CVE-2020-35113

Severity
important
Lowest
Low
Medium
High
Critical

January 20, 2021

Topics%20covered

Topics Covered

security advisory denial of service information leak update critical arbitrary code execution Ubuntu software issue ubuntu thunderbird Thunderbird

Package Information

https://launchpad.net/ubuntu/+source/thunderbird/1:78.6.1+build1-0ubuntu0.20.10.1

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