Test ID:	1.3.6.1.4.1.25623.1.1.10.2021.0506
Category:	Mageia Linux Local Security Checks
Title:	Mageia: Security Advisory (MGASA-2021-0506)
Summary:	The remote host is missing an update for the 'thunderbird, thunderbird-l10n' package(s) announced via the MGASA-2021-0506 advisory.
Description:	Summary: The remote host is missing an update for the 'thunderbird, thunderbird-l10n' package(s) announced via the MGASA-2021-0506 advisory. Vulnerability Insight: Updated thunderbird packages fix security vulnerabilities: The iframe sandbox rules were not correctly applied to XSLT stylesheets, allowing an iframe to bypass restrictions such as executing scripts or navigating the top-level frame (CVE-2021-38503). When interacting with an HTML input element's file picker dialog with webkitdirectory set, a use-after-free could have resulted, leading to memory corruption and a potentially exploitable crash (CVE-2021-38504). Through a series of navigations, Thunderbird could have entered fullscreen mode without notification or warning to the user. This could lead to spoofing attacks on the browser UI including phishing (CVE-2021-38506). The Opportunistic Encryption feature of HTTP2 (RFC 8164) allows a connection to be transparently upgraded to TLS while retaining the visual properties of an HTTP connection, including being same-origin with unencrypted connections on port 80. However, if a second encrypted port on the same IP address (e.g. port 8443) did not opt-in to opportunistic encryption, a network attacker could forward a connection from the browser to port 443 to port 8443, causing the browser to treat the content of port 8443 as same-origin with HTTP. This was resolved by disabling the Opportunistic Encryption feature, which had low usage (CVE-2021-38507). A use-after-free could have occurred when an HTTP2 session object was released on a different thread, leading to memory corruption and a potentially exploitable crash (CVE-2021-43535). By displaying a form validity message in the correct location at the same time as a permission prompt (such as for geolocation), the validity message could have obscured the prompt, resulting in the user potentially being tricked into granting the permission (CVE-2021-38508). Due to an unusual sequence of attacker-controlled events, a Javascript alert() dialog with arbitrary (although unstyled) contents could be displayed over top an uncontrolled webpage of the attacker's choosing (CVE-2021-38509). Mozilla developers and community members Christian Holler, Valentin Gosu, and Andrew McCreight reported memory safety bugs present in Thunderbird 91.2. 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-2021-43534). Affected Software/OS: 'thunderbird, thunderbird-l10n' package(s) on Mageia 8. Solution: Please install the updated package(s). CVSS Score: 7.5 CVSS Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P
Cross-Ref:	Common Vulnerability Exposure (CVE) ID: CVE-2021-38503 Debian Security Information: DSA-5026 (Google Search) https://www.debian.org/security/2021/dsa-5026 Debian Security Information: DSA-5034 (Google Search) https://www.debian.org/security/2022/dsa-5034 https://security.gentoo.org/glsa/202202-03 https://security.gentoo.org/glsa/202208-14 https://bugzilla.mozilla.org/show_bug.cgi?id=1729517 https://www.mozilla.org/security/advisories/mfsa2021-48/ https://www.mozilla.org/security/advisories/mfsa2021-49/ https://www.mozilla.org/security/advisories/mfsa2021-50/ https://lists.debian.org/debian-lts-announce/2021/12/msg00030.html https://lists.debian.org/debian-lts-announce/2022/01/msg00001.html Common Vulnerability Exposure (CVE) ID: CVE-2021-38504 https://bugzilla.mozilla.org/show_bug.cgi?id=1730156 Common Vulnerability Exposure (CVE) ID: CVE-2021-38506 https://bugzilla.mozilla.org/show_bug.cgi?id=1730750 Common Vulnerability Exposure (CVE) ID: CVE-2021-38507 https://bugzilla.mozilla.org/show_bug.cgi?id=1730935 Common Vulnerability Exposure (CVE) ID: CVE-2021-38508 https://bugzilla.mozilla.org/show_bug.cgi?id=1366818 Common Vulnerability Exposure (CVE) ID: CVE-2021-38509 https://bugzilla.mozilla.org/show_bug.cgi?id=1718571 Common Vulnerability Exposure (CVE) ID: CVE-2021-43534 https://bugzilla.mozilla.org/buglist.cgi?bug_id=1606864%2C1712671%2C1730048%2C1735152 Common Vulnerability Exposure (CVE) ID: CVE-2021-43535 https://bugzilla.mozilla.org/show_bug.cgi?id=1667102 https://www.mozilla.org/security/advisories/mfsa2021-43/
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