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USN-6333-1: Thunderbird vulnerabilities

4 September 2023

Several security issues were fixed in Thunderbird.

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Releases

Packages

  • thunderbird - Mozilla Open Source mail and newsgroup client

Details

Junsung Lee discovered that Thunderbird did not properly validate the text
direction override unicode character in filenames. An attacker could
potentially exploits this issue by spoofing file extension while attaching
a file in emails. (CVE-2023-3417)

Max Vlasov discovered that Thunderbird Offscreen Canvas did not properly
track cross-origin tainting. An attacker could potentially exploit this
issue to access image data from another site in violation of same-origin
policy. (CVE-2023-4045)

Alexander Guryanov discovered that Thunderbird did not properly update the
value of a global variable in WASM JIT analysis in some circumstances. An
attacker could potentially exploit this issue to cause a denial of service.
(CVE-2023-4046)

Mark Brand discovered that Thunderbird did not properly validate the size
of an untrusted input stream. An attacker could potentially exploit this
issue to cause a denial of service. (CVE-2023-4050)

Multiple security issues were discovered in Thunderbird. If a user were
tricked into opening a specially crafted website in a browsing context, an
attacker could potentially exploit these to cause a denial of service,
obtain sensitive information, bypass security restrictions, cross-site
tracing, or execute arbitrary code. (CVE-2023-4047, CVE-2023-4048,
CVE-2023-4049, CVE-2023-4055, CVE-2023-4056)

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 23.04
Ubuntu 22.04
Ubuntu 20.04

In general, a standard system update will make all the necessary changes.

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