Headline
CVE-2019-11761: Security vulnerabilities fixed in - Thunderbird 68.2
By using a form with a data URI it was possible to gain access to the privileged JSONView object that had been cloned into content. Impact from exposing this object appears to be minimal, however it was a bypass of existing defense in depth mechanisms. This vulnerability affects Firefox < 70, Thunderbird < 68.2, and Firefox ESR < 68.2.
Mozilla Foundation Security Advisory 2019-35
Announced
October 22, 2019
Impact
critical
Products
Thunderbird
Fixed in
- Thunderbird 68.2
#CVE-2019-15903: Heap overflow in expat library in XML_GetCurrentLineNumber
Reporter
Sebastian Pipping
Impact
high
Description
In libexpat before 2.2.8, crafted XML input could fool the parser into changing from DTD parsing to document parsing too early. A subsequent call to XML_GetCurrentLineNumber or XML_GetCurrentColumnNumber then resulted in a heap-based buffer over-read.
References
- Bug 1584907
#CVE-2019-11757: Use-after-free when creating index updates in IndexedDB
Reporter
Zhanjia Song
Impact
high
Description
When following the value’s prototype chain, it was possible to retain a reference to a locale, delete it, and subsequently reference it. This resulted in a use-after-free and a potentially exploitable crash.
References
- Bug 1577107
#CVE-2019-11758: Potentially exploitable crash due to 360 Total Security
Reporter
Mozilla developers and community
Impact
high
Description
Mozilla community member Philipp reported a memory safety bug present in Firefox 68 when 360 Total Security was installed. This bug showed evidence of memory corruption in the accessibility engine and we presume that with enough effort that it could be exploited to run arbitrary code.
References
- Bug 1536227
#CVE-2019-11759: Stack buffer overflow in HKDF output
Reporter
Guido Vranken
Impact
moderate
Description
An attacker could have caused 4 bytes of HMAC output to be written past the end of a buffer stored on the stack. This could be used by an attacker to execute arbitrary code or more likely lead to a crash.
References
- Bug 1577953
#CVE-2019-11760: Stack buffer overflow in WebRTC networking
Reporter
Nils
Impact
moderate
Description
A fixed-size stack buffer could overflow in nrappkit when doing WebRTC signaling. This resulted in a potentially exploitable crash in some instances.
References
- Bug 1577719
#CVE-2019-11761: Unintended access to a privileged JSONView object
Reporter
Cody Crews
Impact
moderate
Description
By using a form with a data URI it was possible to gain access to the privileged JSONView object that had been cloned into content. Impact from exposing this object appears to be minimal, however it was a bypass of existing defense in depth mechanisms.
References
- Bug 1561502
#CVE-2019-11762: document.domain-based origin isolation has same-origin-property violation
Reporter
Kris Maglione
Impact
moderate
Description
If two same-origin documents set document.domain differently to become cross-origin, it was possible for them to call arbitrary DOM methods/getters/setters on the now-cross-origin window.
References
- Bug 1582857
#CVE-2019-11763: Incorrect HTML parsing results in XSS bypass technique
Reporter
Gareth Heyes
Impact
moderate
Description
Failure to correctly handle null bytes when processing HTML entities resulted in Firefox incorrectly parsing these entities. This could have led to HTML comment text being treated as HTML which could have led to XSS in a web application under certain conditions. It could have also led to HTML entities being masked from filters - enabling the use of entities to mask the actual characters of interest from filters.
References
- Bug 1584216
#CVE-2019-11764: Memory safety bugs fixed in Thunderbird 68.2
Reporter
Mozilla developers and community
Impact
critical
Description
Mozilla developers and community members Bob Clary, Jason Kratzer, Aaron Klotz, Iain Ireland, Tyson Smith, Christian Holler, Steve Fink, Honza Bambas, Byron Campen, and Cristian Brindusan reported memory safety bugs present in Firefox 69 and Firefox ESR 68.1. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could be exploited to run arbitrary code.
References
- Memory safety bugs fixed in Firefox 70 and Firefox ESR 68.2
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In libexpat before 2.2.8, crafted XML input could fool the parser into changing from DTD parsing to document parsing too early; a consecutive call to XML_GetCurrentLineNumber (or XML_GetCurrentColumnNumber) then resulted in a heap-based buffer over-read.