Headline
RHSA-2021:4133: Red Hat Security Advisory: thunderbird security update
An update for thunderbird is now available for Red Hat Enterprise Linux 8.1 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.Mozilla Thunderbird is a standalone mail and newsgroup client. This update upgrades Thunderbird to version 91.3.0. Security Fix(es):
- Mozilla: Use-after-free in HTTP2 Session object
- Mozilla: Memory safety bugs fixed in Firefox 94 and Firefox ESR 91.3
- Mozilla: iframe sandbox rules did not apply to XSLT stylesheets (CVE-2021-38503)
- Mozilla: Use-after-free in file picker dialog (CVE-2021-38504)
- Mozilla: Firefox could be coaxed into going into fullscreen mode without notification or warning (CVE-2021-38506)
- Mozilla: Opportunistic Encryption in HTTP2 could be used to bypass the Same-Origin-Policy on services hosted on other ports (CVE-2021-38507)
- Mozilla: Permission Prompt could be overlaid, resulting in user confusion and potential spoofing (CVE-2021-38508)
- Mozilla: Javascript alert box could have been spoofed onto an arbitrary domain (CVE-2021-38509) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Related CVEs:
- CVE-2021-38503: Mozilla: iframe sandbox rules did not apply to XSLT stylesheets
- CVE-2021-38504: Mozilla: Use-after-free in file picker dialog
- CVE-2021-38506: Mozilla: Firefox could be coaxed into going into fullscreen mode without notification or warning
- CVE-2021-38507: Mozilla: Opportunistic Encryption in HTTP2 could be used to bypass the Same-Origin-Policy on services hosted on other ports
- CVE-2021-38508: Mozilla: Permission Prompt could be overlaid, resulting in user confusion and potential spoofing
- CVE-2021-38509: Mozilla: Javascript alert box could have been spoofed onto an arbitrary domain
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