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Firefox Privacy Notice

Mozilla Foundation Security Advisory 2018-18

Security vulnerabilities fixed in Thunderbird 52.9

Announced
July 3, 2018
Impact
critical
Products
Thunderbird
Fixed in
  • Thunderbird 52.9

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-2018-12359: Buffer overflow using computed size of canvas element

Reporter
Nils
Impact
critical
Description

A buffer overflow can occur when rendering canvas content while adjusting the height and width of the <canvas> element dynamically, causing data to be written outside of the currently computed boundaries. This results in a potentially exploitable crash.

References

#CVE-2018-12360: Use-after-free when using focus()

Reporter
Nils
Impact
critical
Description

A use-after-free vulnerability can occur when deleting an input element during a mutation event handler triggered by focusing that element. This results in a potentially exploitable crash.

References

#CVE-2018-12372: S/MIME and PGP decryption oracles can be built with HTML emails

Reporter
Damian Poddebniak, Christian Dresen, Jens Müller, Fabian Ising, Sebastian Schinzel, Simon Friedberger, Juraj Somorovsky, Jörg Schwenk
Impact
high
Description

Decrypted S/MIME parts, when included in HTML crafted for an attack, can leak plaintext when included in a a HTML reply/forward.

References

#CVE-2018-12373: S/MIME plaintext can be leaked through HTML reply/forward

Reporter
Damian Poddebniak, Christian Dresen, Jens Müller, Fabian Ising, Sebastian Schinzel, Simon Friedberger, Juraj Somorovsky, Jörg Schwenk
Impact
high
Description

dDecrypted S/MIME parts hidden with CSS or <plaintext> can leak plaintext when included in a HTML reply/forward.

References

#CVE-2018-12362: Integer overflow in SSSE3 scaler

Reporter
F. Alonso (revskills)
Impact
high
Description

An integer overflow can occur during graphics operations done by the Supplemental Streaming SIMD Extensions 3 (SSSE3) scaler, resulting in a potentially exploitable crash.

References

#CVE-2018-12363: Use-after-free when appending DOM nodes

Reporter
Nils
Impact
high
Description

A use-after-free vulnerability can occur when script uses mutation events to move DOM nodes between documents, resulting in the old document that held the node being freed but the node still having a pointer referencing it. This results in a potentially exploitable crash.

References

#CVE-2018-12364: CSRF attacks through 307 redirects and NPAPI plugins

Reporter
David Black
Impact
high
Description

NPAPI plugins, such as Adobe Flash, can send non-simple cross-origin requests, bypassing CORS by making a same-origin POST that does a 307 redirect to the target site. This allows for a malicious site to engage in cross-site request forgery (CSRF) attacks.

References

#CVE-2018-12365: Compromised IPC child process can list local filenames

Reporter
Alex Gaynor
Impact
moderate
Description

A compromised IPC child process can escape the content sandbox and list the names of arbitrary files on the file system without user consent or interaction. This could result in exposure of private local files.

References

#CVE-2018-12366: Invalid data handling during QCMS transformations

Reporter
OSS-Fuzz
Impact
moderate
Description

An invalid grid size during QCMS (color profile) transformations can result in the out-of-bounds read interpreted as a float value. This could leak private data into the output.

References

#CVE-2018-12368: No warning when opening executable SettingContent-ms files

Reporter
Abdulrahman Alqabandi
Impact
moderate
Description

Windows 10 does not warn users before opening executable files with the SettingContent-ms extension even when they have been downloaded from the internet and have the "Mark of the Web." Without the warning, unsuspecting users unfamiliar with this new file type might run an unwanted executable. This also allows a WebExtension with the limited downloads.open permission to execute arbitrary code without user interaction on Windows 10 systems
Note: this issue only affects Windows operating systems. Other operating systems are unaffected.

References

#CVE-2018-12374: Using form to exfiltrate encrypted mail part by pressing enter in form field

Reporter
Hanno Boeck
Impact
low
Description

Plaintext of decrypted emails can leak through by user submitting an embedded form by pressing enter key within a text input field.

References

#CVE-2018-5188: Memory safety bugs fixed in Firefox 61, Firefox ESR 60.1, Firefox ESR 52.9, and Thunderbird 52.9

Reporter
Mozilla developers and community
Impact
critical
Description

Mozilla developers and community members Alex Gaynor, Christoph Diehl, Christian Holler, Jason Kratzer, David Major, Jon Coppeard, Nicolas B. Pierron, Jason Kratzer, Marcia Knous, and Ronald Crane reported memory safety bugs present in Firefox 60, Firefox ESR 60, Firefox ESR 52.8, and Thunderbird 52.8. Some of these bugs showed evidence of memory corruption and we presume that with enough effort that some of these could be exploited to run arbitrary code.

References