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[MFSA-2020-04] Security Vulnerabilities fixed in Thunderbird 68.4.1

Severity Critical
Affected Packages 1
Fixed Packages 1
CVEs 7
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-2019-17015: Memory corruption in parent process during new content process initialization on Windows (high)
    During the initialization of a new content process, a pointer offset can be manipulated leading to memory corruption and a potentially exploitable crash in the parent process.
    Note: this issue only occurs on Windows. Other operating systems are unaffected.

  • CVE-2019-17016: Bypass of @namespace CSS sanitization during pasting (high)
    When pasting a <code><style></code> tag from the clipboard into a rich text editor, the CSS sanitizer incorrectly rewrites a @namespace rule. This could allow for injection into certain types of websites resulting in data exfiltration.

  • CVE-2019-17017: Type Confusion in XPCVariant.cpp (high)
    Due to a missing case handling object types, a type confusion vulnerability could occur, resulting in a crash. We presume that with enough effort that it could be exploited to run arbitrary code.

  • CVE-2019-17021: Heap address disclosure in parent process during content process initialization on Windows (moderate)
    During the initialization of a new content process, a race condition occurs that can allow a content process to disclose heap addresses from the parent process.
    Note: this issue only occurs on Windows. Other operating systems are unaffected.

  • CVE-2019-17022: CSS sanitization does not escape HTML tags (moderate)
    When pasting a <code><style></code> tag from the clipboard into a rich text editor, the CSS sanitizer does not escape < and > characters. Because the resulting string is pasted directly into the text node of the element this does not result in a direct injection into the webpage; however, if a webpage subsequently copies the node's innerHTML, assigning it to another innerHTML, this would result in an XSS vulnerability. Two WYSIWYG editors were identified with this behavior, more may exist.

  • CVE-2019-17024: Memory safety bugs fixed in Thunderbird 68.4.1 (high)
    Mozilla developers Jason Kratzer, Christian Holler, and Bob Clary reported memory safety bugs present in Thunderbird 68.3. 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-2019-17026: IonMonkey type confusion with StoreElementHole and FallibleStoreElement (critical)
    Incorrect alias information in IonMonkey JIT compiler for setting array elements could lead to a type confusion. We are aware of targeted attacks in the wild abusing this flaw.

Package Affected Version
pkg:mozilla/Thunderbird < 68.4.1
Package Fixed Version
pkg:mozilla/Thunderbird = 68.4.1
ID
MFSA-2020-04
Severity
critical
URL
https://www.mozilla.org/en-US/security/advisories/mfsa2020-04
Published
2020-01-10T00:00:00
(4 years ago)
Modified
2020-01-10T00:00:00
(4 years ago)
Other Advisories
Source # ID Name URL
Bugzilla 1599005 https://bugzilla.mozilla.org/show_bug.cgi?id=1599005
Bugzilla 1599181 https://bugzilla.mozilla.org/show_bug.cgi?id=1599181
Bugzilla 1603055 https://bugzilla.mozilla.org/show_bug.cgi?id=1603055
Bugzilla 1599008 https://bugzilla.mozilla.org/show_bug.cgi?id=1599008
Bugzilla 1602843 https://bugzilla.mozilla.org/show_bug.cgi?id=1602843
Bugzilla 1507180 Memory safety bugs fixed in Thunderbird 68.4.1 https://bugzilla.mozilla.org/show_bug.cgi?id=1507180
Bugzilla 1595470 Memory safety bugs fixed in Thunderbird 68.4.1 https://bugzilla.mozilla.org/show_bug.cgi?id=1595470
Bugzilla 1598605 Memory safety bugs fixed in Thunderbird 68.4.1 https://bugzilla.mozilla.org/show_bug.cgi?id=1598605
Bugzilla 1601826 Memory safety bugs fixed in Thunderbird 68.4.1 https://bugzilla.mozilla.org/show_bug.cgi?id=1601826
Bugzilla 1607443 https://bugzilla.mozilla.org/show_bug.cgi?id=1607443
Type Package URL Namespace Name / Product Version Distribution / Platform Arch Patch / Fix
Affected pkg:mozilla/Thunderbird Thunderbird < 68.4.1
Fixed pkg:mozilla/Thunderbird Thunderbird = 68.4.1
# 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