ALAS2-2021-1681

Amazon Linux 2 Security Advisory: ALAS-2021-1681
Advisory Release Date: 2021-07-01 01:07 Pacific
Advisory Updated Date: 2021-07-01 20:25 Pacific
Severity: Important
Issue Overview:

OpenPGP secret keys that were imported using Thunderbird version 78.8.1 up to version 78.10.1 were stored unencrypted on the user's local disk. The master password protection was inactive for those keys. Version 78.10.2 will restore the protection mechanism for newly imported keys, and will automatically protect keys that had been imported using affected Thunderbird versions. This vulnerability affects Thunderbird < 78.10.2. (CVE-2021-29956)

If a MIME encoded email contains an OpenPGP inline signed or encrypted message part, but also contains an additional unprotected part, Thunderbird did not indicate that only parts of the message are protected. This vulnerability affects Thunderbird < 78.10.2. (CVE-2021-29957)

Mozilla developers reported memory safety bugs present in Firefox 88 and Firefox ESR 78.11. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Thunderbird < 78.11, Firefox < 89, and Firefox ESR < 78.11. (CVE-2021-29967)


Affected Packages:

thunderbird


Note:

This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.


Issue Correction:
Run yum update thunderbird to update your system.

New Packages:
aarch64:
    thunderbird-78.11.0-1.amzn2.0.1.aarch64
    thunderbird-debuginfo-78.11.0-1.amzn2.0.1.aarch64

src:
    thunderbird-78.11.0-1.amzn2.0.1.src

x86_64:
    thunderbird-78.11.0-1.amzn2.0.1.x86_64
    thunderbird-debuginfo-78.11.0-1.amzn2.0.1.x86_64

Additional References

Red Hat: CVE-2021-29956, CVE-2021-29957, CVE-2021-29967

Mitre: CVE-2021-29956, CVE-2021-29957, CVE-2021-29967