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Ubuntu Security Notice USN-5058-1

Ubuntu Security Notice USN-5058-1
Posted Aug 31, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5058-1 - It was discovered that Thunderbird didn't ignore IMAP server responses prior to completion of the STARTTLS handshake. A person-in-the-middle could potentially exploit this to trick Thunderbird into showing incorrect information. 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, or execute arbitrary code. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, imap
systems | linux, ubuntu
advisories | CVE-2021-29969, CVE-2021-29984, CVE-2021-29985, CVE-2021-29989, CVE-2021-30547
MD5 | 1487dd0ba06bf1fac526565425dc0587

Ubuntu Security Notice USN-5058-1

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-5058-1
August 31, 2021

thunderbird vulnerabilities
==========================================================================

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

- Ubuntu 21.04
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

Several security issues were fixed in Thunderbird.

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

Details:

It was discovered that Thunderbird didn't ignore IMAP server responses
prior to completion of the STARTTLS handshake. A person-in-the-middle
could potentially exploit this to trick Thunderbird into showing incorrect
information. (CVE-2021-29969)

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, or
execute arbitrary code. (CVE-2021-29970, CVE-2021-29976, CVE-2021-29980,
CVE-2021-29984, CVE-2021-29985, CVE-2021-29986, CVE-2021-29988,
CVE-2021-29989, CVE-2021-30547)

Update instructions:

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

Ubuntu 21.04:
thunderbird 1:78.13.0+build1-0ubuntu0.21.04.2

Ubuntu 20.04 LTS:
thunderbird 1:78.13.0+build1-0ubuntu0.20.04.2

Ubuntu 18.04 LTS:
thunderbird 1:78.13.0+build1-0ubuntu0.18.04.1

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

References:
https://ubuntu.com/security/notices/USN-5058-1
CVE-2021-29969, CVE-2021-29970, CVE-2021-29976, CVE-2021-29980,
CVE-2021-29984, CVE-2021-29985, CVE-2021-29986, CVE-2021-29988,
CVE-2021-29989, CVE-2021-30547

Package Information:

https://launchpad.net/ubuntu/+source/thunderbird/1:78.13.0+build1-0ubuntu0.21.04.2

https://launchpad.net/ubuntu/+source/thunderbird/1:78.13.0+build1-0ubuntu0.20.04.2

https://launchpad.net/ubuntu/+source/thunderbird/1:78.13.0+build1-0ubuntu0.18.04.1
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