ALAS2-2021-1632


Amazon Linux 2 Security Advisory: ALAS-2021-1632
Advisory Release Date: 2021-04-20 17:56 Pacific
Advisory Updated Date: 2021-04-21 17:52 Pacific
Severity: Important

Issue Overview:

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. (CVE-2021-23981 )

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. (CVE-2021-23982 )

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. (CVE-2021-23984 )

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. (CVE-2021-23987 )


Affected Packages:

thunderbird


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

New Packages:
aarch64:
    thunderbird-78.9.0-3.amzn2.aarch64
    thunderbird-debuginfo-78.9.0-3.amzn2.aarch64

src:
    thunderbird-78.9.0-3.amzn2.src

x86_64:
    thunderbird-78.9.0-3.amzn2.x86_64
    thunderbird-debuginfo-78.9.0-3.amzn2.x86_64