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[MFSA-2020-14] Security Vulnerabilities fixed in Thunderbird 68.7.0

Severity Critical
Affected Packages 1
Fixed Packages 1
CVEs 5
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-2020-6819: Use-after-free while running the nsDocShell destructor (critical)
    Under certain conditions, when running the nsDocShell destructor, a race condition can cause a use-after-free.

  • CVE-2020-6820: Use-after-free when handling a ReadableStream (critical)
    Under certain conditions, when handling a ReadableStream, a race condition can cause a use-after-free.

  • CVE-2020-6821: Uninitialized memory could be read when using the WebGL copyTexSubImage method (high)
    When reading from areas partially or fully outside the source resource with WebGL's <code>copyTexSubImage</code> method, the specification requires the returned values be zero. Previously, this memory was uninitialized, leading to potentially sensitive data disclosure.

  • CVE-2020-6822: Out of bounds write in GMPDecodeData when processing large images (moderate)
    On 32-bit builds, an out of bounds write could have occurred when processing an image larger than 4 GB in <code>GMPDecodeData</code>. It is possible that with enough effort this could have been exploited to run arbitrary code.

  • CVE-2020-6825: Memory safety bugs fixed in Thunderbird 68.7.0 (high)
    Mozilla developers Tyson Smith and Christian Holler reported memory safety bugs present in Firefox 74 and Firefox ESR 68.6. 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 < 68.7.0
Package Fixed Version
pkg:mozilla/Thunderbird = 68.7.0
ID
MFSA-2020-14
Severity
critical
URL
https://www.mozilla.org/en-US/security/advisories/mfsa2020-14
Published
2020-04-09T00:00:00
(4 years ago)
Modified
2020-04-09T00:00:00
(4 years ago)
Other Advisories
Source # ID Name URL
Bugzilla 1620818 https://bugzilla.mozilla.org/show_bug.cgi?id=1620818
Bugzilla 1626728 https://bugzilla.mozilla.org/show_bug.cgi?id=1626728
Bugzilla 1625404 https://bugzilla.mozilla.org/show_bug.cgi?id=1625404
Bugzilla 1544181 https://bugzilla.mozilla.org/show_bug.cgi?id=1544181
Bugzilla 1572541 Memory safety bugs fixed in Thunderbird 68.7.0 https://bugzilla.mozilla.org/show_bug.cgi?id=1572541
Bugzilla 1620193 Memory safety bugs fixed in Thunderbird 68.7.0 https://bugzilla.mozilla.org/show_bug.cgi?id=1620193
Bugzilla 1620203 Memory safety bugs fixed in Thunderbird 68.7.0 https://bugzilla.mozilla.org/show_bug.cgi?id=1620203
Type Package URL Namespace Name / Product Version Distribution / Platform Arch Patch / Fix
Affected pkg:mozilla/Thunderbird Thunderbird < 68.7.0
Fixed pkg:mozilla/Thunderbird Thunderbird = 68.7.0
# 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