CVE-2021-23993
CVE-2021-23993
Vexday Risk Score
3Low
SSVC decision (CISA)
Track
No exploitation signal → monitor
CVSS —EPSS 0.4%KEV nãoPoC —Nuclei —Metasploit —Patch —
Lifecycle
24 Jun 2021Published on NVD
Recommendation: Monitor — no exploitation signal at the moment.
An attacker may perform a DoS attack to prevent a user from sending encrypted email to a correspondent. If an attacker creates a crafted OpenPGP key with a subkey that has an invalid self signature, and the Thunderbird user imports the crafted key, then Thunderbird may try to use the invalid subkey, but the RNP library rejects it from being used, causing encryption to fail. This vulnerability affects Thunderbird < 78.9.1.
Affected products
Mozilla · ThunderbirdWant to know if your infrastructure is exposed to this?
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