CVE-2020-12397

By encoding Unicode whitespace characters within the From email header, an attacker can spoof the sender email address that Thunderbird displays. This vulnerability affects Thunderbird < 68.8.0.

By encoding Unicode whitespace characters within the From email header, an attacker can spoof the sender email address that Thunderbird displays. This vulnerability affects Thunderbird < 68.8.0.

Updated thunderbird packages fix security vulnerabilities:

A buffer overflow could occur when parsing and validating SCTP chunks in WebRTC. This could have led to memory corruption and a potentially exploitable crash (CVE-2020-6831).

A race condition when running shutdown code for Web Worker led to a use-after-free vulnerability. This resulted in a potentially exploitable crash (CVE-2020-12387).

The 'Copy as cURL' feature of Devtools' network tab did not properly escape the HTTP POST data of a request, which can be controlled by the website. If a user used the 'Copy as cURL' feature and pasted the command into a terminal, it could have resulted in the disclosure of local files (CVE-2020-12392).

Mozilla developers and community members Alexandru Michis, Jason Kratzer, philipp, Ted Campbell, Bas Schouten, André Bargull, and Karl Tomlinson reported memory safety bugs present in Thunderbird ESR 68.7. 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 (CVE-2020-12395).

By encoding Unicode whitespace characters within the From email header, an attacker can spoof the sender email address that Thunderbird displays (CVE-2020-12397).

This update for MozillaThunderbird fixes the following issues:

• Update to 68.8.0 ESR MFSA 2020-18 (bsc#1171186)
  • CVE-2020-12397 (bmo#1617370) Sender Email Address Spoofing using encoded Unicode characters
  • CVE-2020-12387 (bmo#1545345) Use-after-free during worker shutdown
  • CVE-2020-6831 (bmo#1632241) Buffer overflow in SCTP chunk input validation
  • CVE-2020-12392 (bmo#1614468) Arbitrary local file access with 'Copy as cURL'
  • CVE-2020-12393 (bmo#1615471) Devtools' 'Copy as cURL' feature did not fully escape website-controlled data, potentially leading to command injection
  • CVE-2020-12395 (bmo#1595886, bmo#1611482, bmo#1614704, bmo#1624098, bmo#1625749, bmo#1626382, bmo#1628076, bmo#1631508) Memory safety bugs fixed in Thunderbird 68.8.0

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:

• Update to 68.8.0 ESR MFSA 2020-18 (bsc#1171186)
  • CVE-2020-12397 (bmo#1617370) Sender Email Address Spoofing using encoded Unicode characters
  • CVE-2020-12387 (bmo#1545345) Use-after-free during worker shutdown
  • CVE-2020-6831 (bmo#1632241) Buffer overflow in SCTP chunk input validation
  • CVE-2020-12392 (bmo#1614468) Arbitrary local file access with 'Copy as cURL'
  • CVE-2020-12393 (bmo#1615471) Devtools' 'Copy as cURL' feature did not fully escape website-controlled data, potentially leading to command injection
  • CVE-2020-12395 (bmo#1595886, bmo#1611482, bmo#1614704, bmo#1624098, bmo#1625749, bmo#1626382, bmo#1628076, bmo#1631508) Memory safety bugs fixed in Thunderbird 68.8.0

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, or execute arbitrary code. (CVE-2020-6831, CVE-2020-12387, CVE-2020-12395)

It was discovered that the Devtools’ ‘Copy as cURL’ feature did not properly escape the HTTP POST data of a request. 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 obtain sensitive information from local files. (CVE-2020-12392)

It was discovered that Thunderbird did not correctly handle Unicode whitespace characters within the From email header. An attacker could potentially exploit this to spoof the sender email address that Thunderbird displays. (CVE-2020-12397)