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[MFSA-2021-09] Security Vulnerabilities fixed in Thunderbird 78.8

Severity High
Affected Packages 1
Fixed Packages 1
CVEs 4
Info Packages References Vulnerabilities

In general, these flaws cannot be exploited through email in the Thunderbird product because scripting is disabled when reading mail, but are potentially risks in browser or browser-like contexts.

  • CVE-2021-23968: Content Security Policy violation report could have contained the destination of a redirect (high)
    If Content Security Policy blocked frame navigation, the full destination of a redirect served in the frame was reported in the violation report; as opposed to the original frame URI. This could be used to leak sensitive information contained in such URIs.

  • CVE-2021-23969: Content Security Policy violation report could have contained the destination of a redirect (high)
    As specified in the W3C Content Security Policy draft, when creating a violation report, "User agents need to ensure that the source file is the URL requested by the page, pre-redirects. If that’s not possible, user agents need to strip the URL down to an origin to avoid unintentional leakage." Under certain types of redirects, Thunderbird incorrectly set the source file to be the destination of the redirects. This was fixed to be the redirect destination's origin.

  • CVE-2021-23973: MediaError message property could have leaked information about cross-origin resources (low)
    When trying to load a cross-origin resource in an audio/video context a decoding error may have resulted, and the content of that error may have revealed information about the resource.

  • CVE-2021-23978: Memory safety bugs fixed in Thunderbird 78.8 (high)
    Mozilla developers Alexis Beingessner, Tyson Smith, Nika Layzell, and Mats Palmgren reported memory safety bugs present in Thunderbird 78.7. 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.

Package Affected Version
pkg:mozilla/Thunderbird < 78.8
Package Fixed Version
pkg:mozilla/Thunderbird = 78.8
ID
MFSA-2021-09
Severity
high
URL
https://www.mozilla.org/en-US/security/advisories/mfsa2021-09
Published
2021-02-23T00:00:00
(3 years ago)
Modified
2021-02-23T00:00:00
(3 years ago)
Other Advisories
Source # ID Name URL
Bugzilla 1687342 https://bugzilla.mozilla.org/show_bug.cgi?id=1687342
Bugzilla 1542194 https://bugzilla.mozilla.org/show_bug.cgi?id=1542194
Bugzilla 1690976 https://bugzilla.mozilla.org/show_bug.cgi?id=1690976
Bugzilla 786797 Memory safety bugs fixed in Thunderbird 78.8 https://bugzilla.mozilla.org/show_bug.cgi?id=786797
Bugzilla 1682928 Memory safety bugs fixed in Thunderbird 78.8 https://bugzilla.mozilla.org/show_bug.cgi?id=1682928
Bugzilla 1687391 Memory safety bugs fixed in Thunderbird 78.8 https://bugzilla.mozilla.org/show_bug.cgi?id=1687391
Bugzilla 1687597 Memory safety bugs fixed in Thunderbird 78.8 https://bugzilla.mozilla.org/show_bug.cgi?id=1687597
Type Package URL Namespace Name / Product Version Distribution / Platform Arch Patch / Fix
Affected pkg:mozilla/Thunderbird Thunderbird < 78.8
Fixed pkg:mozilla/Thunderbird Thunderbird = 78.8
# CVE Description CVSS EPSS EPSS Trend (30 days) Affected Products Weaknesses Security Advisories Exploits PoC Pubblication Date Modification Date
# CVE Description CVSS EPSS EPSS Trend (30 days) Affected Products Weaknesses Security Advisories PoC Pubblication Date Modification Date