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From: Chris Coulson
Reply-To: Ubuntu Security
To: ubuntu-security-announce@lists.ubuntu.com
Message-ID: <5edb3fa4-f4bb-251d-9ba9-3843c109999c@canonical.com>
Subject: [USN-4936-1] Thunderbird vulnerabilities
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==========================================================================
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
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
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