Important: thunderbird security update (Amazon Linux 2)

Package updates are available for Amazon Linux 2 that fix the following vulnerabilities: CVE-2021-23987: The Mozilla Foundation Security Advisory describes this issue as: Mozilla developers and community members reported memory safety bugs present in Firefox 86 and Firefox ESR 78.8. 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. 1942787: CVE-2021-23987 Mozilla: Memory safety bugs fixed in Firefox 87 and Firefox ESR 78.9 CVE-2021-23984: The Mozilla Foundation Security Advisory describes this issue as: A malicious extension could have opened a popup window lacking an address bar. The title of the popup lacking an address bar should not be fully controllable, but in this situation was. This could have been used to spoof a website and attempt to trick the user into providing credentials. 1942786: CVE-2021-23984 Mozilla: Malicious extensions could have spoofed popup information CVE-2021-23982: Using techniques that built on the slipstream research, a malicious webpage could have scanned both an internal network's hosts as well as services running on the user's local machine utilizing WebRTC connections. This vulnerability affects Firefox ESR < 78.9, Thunderbird < 78.9, and Firefox < 87. 1942785: CVE-2021-23982 Mozilla: Internal network hosts could have been probed by a malicious webpage CVE-2021-23981: The Mozilla Foundation Security Advisory describes this issue as: A texture upload of a Pixel Buffer Object could have confused the WebGL code to skip binding the buffer used to unpack it, resulting in memory corruption and a potentially exploitable information leak or crash. 1942783: CVE-2021-23981 Mozilla: Texture upload into an unbound backing buffer resulted in an out-of-bound read