Mozilla Foundation Security Advisory 2022-06
Security Vulnerabilities fixed in Thunderbird 91.6
- Announced
- February 8, 2022
- Impact
- high
- Products
- Thunderbird
- Fixed in
-
- Thunderbird 91.6
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-2022-22753: Privilege Escalation to SYSTEM on Windows via Maintenance Service
- Reporter
- Seb Patane
- Impact
- high
Description
A Time-of-Check Time-of-Use bug existed in the Maintenance (Updater) Service that could be abused to grant Users write access to an arbitrary directory. This could have been used to escalate to SYSTEM access.
This bug only affects Thunderbird on Windows. Other operating systems are unaffected.
References
#CVE-2022-22754: Extensions could have bypassed permission confirmation during update
- Reporter
- Rob Wu
- Impact
- high
Description
If a user installed an extension of a particular type, the extension could have auto-updated itself and while doing so, bypass the prompt which grants the new version the new requested permissions.
References
#CVE-2022-22756: Drag and dropping an image could have resulted in the dropped object being an executable
- Reporter
- Abdulrahman Alqabandi
- Impact
- moderate
Description
If a user was convinced to drag and drop an image to their desktop or other folder, the resulting object could have been changed into an executable script which would have run arbitrary code after the user clicked on it.
References
#CVE-2022-22759: Sandboxed iframes could have executed script if the parent appended elements
- Reporter
- Johan Carlsson
- Impact
- moderate
Description
If a document created a sandboxed iframe without allow-scripts, and subsequently appended an element to the iframe's document that e.g. had a JavaScript event handler - the event handler would have run despite the iframe's sandbox.
References
#CVE-2022-22760: Cross-Origin responses could be distinguished between script and non-script content-types
- Reporter
- Luan Herrera
- Impact
- moderate
Description
When importing resources using Web Workers, error messages would distinguish the difference between application/javascript responses and non-script responses. This could have been abused to learn information cross-origin.
References
#CVE-2022-22761: frame-ancestors Content Security Policy directive was not enforced for framed extension pages
- Reporter
- Mart Gil Robles (Mart at FlowCrypt)
- Impact
- moderate
Description
Web-accessible extension pages (pages with a moz-extension:// scheme) were not correctly enforcing the frame-ancestors directive when it was used in the Web Extension's Content Security Policy.
References
#CVE-2022-22763: Script Execution during invalid object state
- Reporter
- Mozilla Fuzzing Team
- Impact
- moderate
Description
When a worker is shutdown, it was possible to cause script to run late in the lifecycle, at a point after where it should not be possible.
References
#CVE-2022-22764: Memory safety bugs fixed in Thunderbird 91.6
- Reporter
- Mozilla developers and community
- Impact
- high
Description
Mozilla developers and community members Paul Adenot and the Mozilla Fuzzing Team reported memory safety bugs present in Thunderbird 91.5. 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.