6.8 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
8.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
9 High
AI Score
Confidence
High
0.003 Low
EPSS
Percentile
67.8%
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
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-78.9.0-3.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
Red Hat: CVE-2021-23981, CVE-2021-23982, CVE-2021-23984, CVE-2021-23987
Mitre: CVE-2021-23981, CVE-2021-23982, CVE-2021-23984, CVE-2021-23987
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Amazon Linux | 2 | aarch64 | thunderbird | < 78.9.0-3.amzn2 | thunderbird-78.9.0-3.amzn2.aarch64.rpm |
Amazon Linux | 2 | aarch64 | thunderbird-debuginfo | < 78.9.0-3.amzn2 | thunderbird-debuginfo-78.9.0-3.amzn2.aarch64.rpm |
Amazon Linux | 2 | x86_64 | thunderbird | < 78.9.0-3.amzn2 | thunderbird-78.9.0-3.amzn2.x86_64.rpm |
Amazon Linux | 2 | x86_64 | thunderbird-debuginfo | < 78.9.0-3.amzn2 | thunderbird-debuginfo-78.9.0-3.amzn2.x86_64.rpm |
6.8 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
8.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
9 High
AI Score
Confidence
High
0.003 Low
EPSS
Percentile
67.8%