CVE-2020-6795

When processing a message that contains multiple S/MIME signatures, a bug in the MIME processing code caused a null pointer dereference, leading to an unexploitable crash. This vulnerability affects Thunderbird < 68.5.

When processing a message that contains multiple S/MIME signatures, a bug in the MIME processing code caused a null pointer dereference, leading to an unexploitable crash. This vulnerability affects Thunderbird < 68.5.

Updated thunderbird packages fix security vulnerabilities:

When deriving an identifier for an email message, uninitialized memory was used in addition to the message contents (CVE-2020-6792).

When processing an email message with an ill-formed envelope, Thunderbird could read data from a random memory location (CVE-2020-6793).

If a user saved passwords before Thunderbird 60 and then later set a master password, an unencrypted copy of these passwords is still accessible. This is because the older stored password file was not deleted when the data was copied to a new format starting in Thunderbird 60. The new master password is added only on the new file. This could allow the exposure of stored password data outside of user expectations (CVE-2020-6794).

When processing a message that contains multiple S/MIME signatures, a bug in the MIME processing code caused a null pointer dereference, leading to an unexploitable crash (CVE-2020-6795).

If a <template> tag was used in a <select> tag, the parser could be confused and allow JavaScript parsing and execution when it should not be allowed. A site that relied on the browser behaving correctly could suffer a cross-site scripting vulnerability as a result (CVE-2020-6798).

Memory safety bugs present in Thunderbird ESR 68.4. Some of these bugs showed evidence of memory corruption and presumably some of these could have been exploited to run arbitrary code (CVE-2020-6800).

This update for MozillaThunderbird fixes the following issues:

• Mozilla Thunderbird 68.5 (bsc#1162777) MFSA 2020-07 (bsc#1163368)

  • CVE-2020-6793 (bmo#1608539) Out-of-bounds read when processing certain email messages

  • CVE-2020-6794 (bmo#1606619) Setting a master password post-Thunderbird 52 does not delete unencrypted previously stored passwords

  • CVE-2020-6795 (bmo#1611105) Crash processing S/MIME messages with multiple signatures

  • CVE-2020-6797 (bmo#1596668) Extensions granted downloads.open permission could open arbitrary applications on Mac OSX

  • CVE-2020-6798 (bmo#1602944) Incorrect parsing of template tag could result in JavaScript injection

  • CVE-2020-6792 (bmo#1609607) Message ID calculcation was based on uninitialized data

  • CVE-2020-6800 (bmo#1595786, bmo#1596706, bmo#1598543, bmo#1604851, bmo#1605777, bmo#1608580, bmo#1608785) Memory safety bugs fixed in Thunderbird 68.5

  • new: Support for Client Identity IMAP/SMTP Service Extension (bmo#1532388)

  • new: Support for OAuth 2.0 authentication for POP3 accounts (bmo#1538409)

  • fixed: Status area goes blank during account setup (bmo#1593122)

  • fixed: Calendar: Could not remove color for default categories (bmo#1584853)

  • fixed: Calendar: Prevent calendar component loading multiple times (bmo#1606375)

  • fixed: Calendar: Today pane did not retain width between sessions (bmo#1610207)

  • unresolved: When upgrading from Thunderbird version 60 to version 68, add-ons are not automatically updated during the upgrade process. They will however be updated during the add- on update check. It is of course possible to reinstall compatible add-ons via the Add-ons Manager or via addons.thunderbird.net. (bmo#1574183)

  • changed: Calendar: Task and Event tree colours adjusted for the dark theme (bmo#1608344)

  • fixed: Retrieval of S/MIME certificates from LDAP failed (bmo#1604773)

  • fixed: Address-parsing crash on some IMAP servers when preference mail.imap.use_envelope_cmd was set (bmo#1609690)

  • fixed: Incorrect forwarding of HTML messages caused SMTP servers to respond with a timeout (bmo#1222046)

  • fixed: Calendar: Various parts of the calendar UI stopped working when a second Thunderbird window opened (bmo#1608407)

This update was imported from the SUSE:SLE-15:Update update project.

These are all security issues fixed in the MozillaThunderbird-91.1.1-1.1 package on the GA media of openSUSE Tumbleweed.

This update for MozillaThunderbird fixes the following issues:

• Mozilla Thunderbird 68.5 (bsc#1162777) MFSA 2020-07 (bsc#1163368)

  • CVE-2020-6793 (bmo#1608539) Out-of-bounds read when processing certain email messages

  • CVE-2020-6794 (bmo#1606619) Setting a master password post-Thunderbird 52 does not delete unencrypted previously stored passwords

  • CVE-2020-6795 (bmo#1611105) Crash processing S/MIME messages with multiple signatures

  • CVE-2020-6797 (bmo#1596668) Extensions granted downloads.open permission could open arbitrary applications on Mac OSX

  • CVE-2020-6798 (bmo#1602944) Incorrect parsing of template tag could result in JavaScript injection

  • CVE-2020-6792 (bmo#1609607) Message ID calculcation was based on uninitialized data

  • CVE-2020-6800 (bmo#1595786, bmo#1596706, bmo#1598543, bmo#1604851, bmo#1605777, bmo#1608580, bmo#1608785) Memory safety bugs fixed in Thunderbird 68.5

  • new: Support for Client Identity IMAP/SMTP Service Extension (bmo#1532388)

  • new: Support for OAuth 2.0 authentication for POP3 accounts (bmo#1538409)

  • fixed: Status area goes blank during account setup (bmo#1593122)

  • fixed: Calendar: Could not remove color for default categories (bmo#1584853)

  • fixed: Calendar: Prevent calendar component loading multiple times (bmo#1606375)

  • fixed: Calendar: Today pane did not retain width between sessions (bmo#1610207)

  • unresolved: When upgrading from Thunderbird version 60 to version 68, add-ons are not automatically updated during the upgrade process. They will however be updated during the add- on update check. It is of course possible to reinstall compatible add-ons via the Add-ons Manager or via addons.thunderbird.net. (bmo#1574183)

  • changed: Calendar: Task and Event tree colours adjusted for the dark theme (bmo#1608344)

  • fixed: Retrieval of S/MIME certificates from LDAP failed (bmo#1604773)

  • fixed: Address-parsing crash on some IMAP servers when preference mail.imap.use_envelope_cmd was set (bmo#1609690)

  • fixed: Incorrect forwarding of HTML messages caused SMTP servers to respond with a timeout (bmo#1222046)

  • fixed: Calendar: Various parts of the calendar UI stopped working when a second Thunderbird window opened (bmo#1608407)

It was discovered that Message ID calculation was based on uninitialized data. An attacker could potentially exploit this to obtain sensitive information. (CVE-2020-6792)

Mutiple security issues were discovered in Thunderbird. If a user were tricked in to opening a specially crafted message, an attacker could potentially exploit these to cause a denial of service, obtain sensitive information, or execute arbitrary code. (CVE-2020-6793, CVE-2020-6795, CVE-2020-6822)

It was discovered that if a user saved passwords before Thunderbird 60 and then later set a master password, an unencrypted copy of these passwords would still be accessible. A local user could exploit this to obtain sensitive information. (CVE-2020-6794)

Multiple security issues were discovered in Thunderbird. If a user were tricked in to opening a specially crafted website in a browsing context, an attacker could potentially exploit these to cause a denial of service, conduct cross-site scripting (XSS) attacks, obtain sensitive information, or execute arbitrary code. (CVE-2019-20503, CVE-2020-6798, CVE-2020-6800, CVE-2020-6805, CVE-2020-6806, CVE-2020-6807, CVE-2020-6812, CVE-2020-6814, CVE-2020-6819, CVE-2020-6820, CVE-2020-6821, CVE-2020-6825)

It was discovered that the Devtools’ ‘Copy as cURL’ feature did not fully escape website-controlled data. If a user were tricked in to using the ‘Copy as cURL’ feature to copy and paste a command with specially crafted data in to a terminal, an attacker could potentially exploit this to execute arbitrary commands via command injection. (CVE-2020-6811)

Multiple security issues were discovered in Thunderbird. If a user were tricked in to opening a specially crafted website in a browsing context, an attacker could potentially exploit these to cause a denial of service, obtain sensitive information, bypass security restrictions, bypass same-origin restrictions, conduct cross-site scripting (XSS) attacks, or execute arbitrary code. (CVE-2019-11757, CVE-2019-11758, CVE-2019-11759, CVE-2019-11760, CVE-2019-11761, CVE-2019-11762, CVE-2019-11763, CVE-2019-11764, CVE-2019-17005, CVE-2019-17008, CVE-2019-17010, CVE-2019-17011, CVE-2019-17012, CVE-2019-17016, CVE-2019-17017, CVE-2019-17022, CVE-2019-17024, CVE-2019-17026, CVE-2019-20503, CVE-2020-6798, CVE-2020-6800, CVE-2020-6805, CVE-2020-6806, CVE-2020-6807, CVE-2020-6812, CVE-2020-6814, CVE-2020-6819, CVE-2020-6820, CVE-2020-6821, CVE-2020-6825)

It was discovered that NSS incorrectly handled certain memory operations. A remote attacker could potentially exploit this to cause a denial of service, or execute arbitrary code. (CVE-2019-11745)

It was discovered that a specially crafted S/MIME message with an inner encryption layer could be displayed as having a valid signature in some circumstances, even if the signer had no access to the encrypted message. An attacker could potentially exploit this to spoof the message author. (CVE-2019-11755)

A heap overflow was discovered in the expat library in Thunderbird. If a user were tricked in to opening a specially crafted message, an attacker could potentially exploit this to cause a denial of service, or execute arbitrary code. (CVE-2019-15903)

It was discovered that Message ID calculation was based on uninitialized data. An attacker could potentially exploit this to obtain sensitive information. (CVE-2020-6792)

Mutiple security issues were discovered in Thunderbird. If a user were tricked in to opening a specially crafted message, an attacker could potentially exploit these to cause a denial of service, obtain sensitive information, or execute arbitrary code. (CVE-2020-6793, CVE-2020-6795, CVE-2020-6822)

It was discovered that if a user saved passwords before Thunderbird 60 and then later set a primary password, an unencrypted copy of these passwords would still be accessible. A local user could exploit this to obtain sensitive information. (CVE-2020-6794)

It was discovered that the Devtools’ ‘Copy as cURL’ feature did not fully escape website-controlled data. If a user were tricked in to using the ‘Copy as cURL’ feature to copy and paste a command with specially crafted data in to a terminal, an attacker could potentially exploit this to execute arbitrary commands via command injection. (CVE-2020-6811)