CVE-2023-0616

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-06-02 · updated 2026-10-24
Weakness: CWE-400

Description

If a MIME email combines OpenPGP and OpenPGP MIME data in a certain way Thunderbird repeatedly attempts to process and display the message, which could cause Thunderbird's user interface to lock up and no longer respond to the user's actions. An attacker could send a crafted message with this structure to attempt a DoS attack. This vulnerability affects Thunderbird < 102.8.

Affected products

Mozilla Thunderbird: before 102.8 — fixed in 102.8

How to fix

Upgrade to a fixed version: Mozilla Thunderbird 102.8. Check the vendor advisory for mitigations.

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1806507
https://www.mozilla.org/security/advisories/mfsa2023-07/
https://bugzilla.mozilla.org/show_bug.cgi?id=1806507
https://www.mozilla.org/security/advisories/mfsa2023-07/

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