Mozilla Foundation Security Advisory 2021-14
Security Vulnerabilities fixed in Thunderbird 78.10
- Announced
- April 19, 2021
- Impact
- high
- Products
- Thunderbird
- Fixed in
-
- Thunderbird 78.10
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-2021-23994: Out of bound write due to lazy initialization
- Reporter
- Abraruddin Khan and Omair
- Impact
- high
Description
A WebGL framebuffer was not initialized early enough, resulting in memory corruption and an out of bound write.
References
#CVE-2021-23995: Use-after-free in Responsive Design Mode
- Reporter
- Irvan Kurniawan
- Impact
- high
Description
When Responsive Design Mode was enabled, it used references to objects that were previously freed. We presume that with enough effort this could have been exploited to run arbitrary code.
References
#CVE-2021-23998: Secure Lock icon could have been spoofed
- Reporter
- Jordi Chancel
- Impact
- moderate
Description
Through complicated navigations with new windows, an HTTP page could have inherited a secure lock icon from an HTTPS page.
References
#CVE-2021-23961: More internal network hosts could have been probed by a malicious webpage
- Reporter
- Samy Kamkar, Ben Seri, and Gregory Vishnepolsky
- Impact
- moderate
Description
Further techniques that built on the slipstream research combined with a malicious webpage could have exposed both an internal network's hosts as well as services running on the user's local machine.
References
#CVE-2021-23999: Blob URLs may have been granted additional privileges
- Reporter
- Nika Layzell
- Impact
- moderate
Description
If a Blob URL was loaded through some unusual user interaction, it could have been loaded by the System Principal and granted additional privileges that should not be granted to web content.
References
#CVE-2021-24002: Arbitrary FTP command execution on FTP servers using an encoded URL
- Reporter
- Daniel Santos
- Impact
- moderate
Description
When a user clicked on an FTP URL containing encoded newline characters (%0A and %0D), the newlines would have been interpreted as such and allowed arbitrary commands to be sent to the FTP server.
References
#CVE-2021-29945: Incorrect size computation in WebAssembly JIT could lead to null-reads
- Reporter
- Christian Holler
- Impact
- moderate
Description
The WebAssembly JIT could miscalculate the size of a return type, which could lead to a null read and result in a crash.
Note: This issue only affected x86-32 platforms. Other platforms are unaffected.
References
#CVE-2021-29946: Port blocking could be bypassed
- Reporter
- Frederik Braun
- Impact
- low
Description
Ports that were written as an integer overflow above the bounds of a 16-bit integer could have bypassed port blocking restrictions when used in the Alt-Svc header.
References
#CVE-2021-29948: Race condition when reading from disk while verifying signatures
- Reporter
- Cure53
- Impact
- low
Description
Signatures are written to disk before and read during verification, which might be subject to a race condition when a malicious local process or user is replacing the file.