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[MFSA-2021-35] Security Vulnerabilities fixed in Thunderbird 78.13

Severity High
Affected Packages 1
Fixed Packages 1
CVEs 6
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-2021-29980: Uninitialized memory in a canvas object could have led to memory corruption (high)
    Uninitialized memory in a canvas object could have caused an incorrect free() leading to memory corruption and a potentially exploitable crash.

  • CVE-2021-29984: Incorrect instruction reordering during JIT optimization (high)
    Instruction reordering resulted in a sequence of instructions that would cause an object to be incorrectly considered during garbage collection. This led to memory corruption and a potentially exploitable crash.

  • CVE-2021-29985: Use-after-free media channels (moderate)
    A use-after-free vulnerability in media channels could have led to memory corruption and a potentially exploitable crash.

  • CVE-2021-29986: Race condition when resolving DNS names could have led to memory corruption (high)
    A suspected race condition when calling <code>getaddrinfo</code> led to memory corruption and a potentially exploitable crash.
    Note: This issue only affected Linux operating systems. Other operating systems are unaffected.

  • CVE-2021-29988: Memory corruption as a result of incorrect style treatment (high)
    Thunderbird incorrectly treated an inline list-item element as a block element, resulting in an out of bounds read or memory corruption, and a potentially exploitable crash.

  • CVE-2021-29989: Memory safety bugs fixed in Thunderbird 78.13 (high)
    Mozilla developers Christoph Kerschbaumer, Simon Giesecke, Sandor Molnar, and Olli Pettay reported memory safety bugs present in Thunderbird 78.12. 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 < 78.13
Package Fixed Version
pkg:mozilla/Thunderbird = 78.13
ID
MFSA-2021-35
Severity
high
URL
https://www.mozilla.org/en-US/security/advisories/mfsa2021-35
Published
2021-08-10T00:00:00
(3 years ago)
Modified
2021-08-10T00:00:00
(3 years ago)
Other Advisories
Source # ID Name URL
Bugzilla 1722204 https://bugzilla.mozilla.org/show_bug.cgi?id=1722204
Bugzilla 1720031 https://bugzilla.mozilla.org/show_bug.cgi?id=1720031
Bugzilla 1722083 https://bugzilla.mozilla.org/show_bug.cgi?id=1722083
Bugzilla 1696138 https://bugzilla.mozilla.org/show_bug.cgi?id=1696138
Bugzilla 1717922 https://bugzilla.mozilla.org/show_bug.cgi?id=1717922
Bugzilla 1662676 Memory safety bugs fixed in Thunderbird 78.13 https://bugzilla.mozilla.org/show_bug.cgi?id=1662676
Bugzilla 1666184 Memory safety bugs fixed in Thunderbird 78.13 https://bugzilla.mozilla.org/show_bug.cgi?id=1666184
Bugzilla 1719178 Memory safety bugs fixed in Thunderbird 78.13 https://bugzilla.mozilla.org/show_bug.cgi?id=1719178
Bugzilla 1719998 Memory safety bugs fixed in Thunderbird 78.13 https://bugzilla.mozilla.org/show_bug.cgi?id=1719998
Bugzilla 1720568 Memory safety bugs fixed in Thunderbird 78.13 https://bugzilla.mozilla.org/show_bug.cgi?id=1720568
Type Package URL Namespace Name / Product Version Distribution / Platform Arch Patch / Fix
Affected pkg:mozilla/Thunderbird Thunderbird < 78.13
Fixed pkg:mozilla/Thunderbird Thunderbird = 78.13
# 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