SecuritySpace - CVE-2021-23993

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CVE ID: CVE-2021-23993

Description: 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.

Test IDs: None available

Cross References: Common Vulnerability Exposure (CVE) ID: CVE-2021-23993
https://bugzilla.mozilla.org/show_bug.cgi?id=1666360
https://bugzilla.mozilla.org/show_bug.cgi?id=1666360
https://www.mozilla.org/security/advisories/mfsa2021-13/
https://www.mozilla.org/security/advisories/mfsa2021-13/

CVE ID:	CVE-2021-23993
Description:	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.
Test IDs:	None available
Cross References:	Common Vulnerability Exposure (CVE) ID: CVE-2021-23993 https://bugzilla.mozilla.org/show_bug.cgi?id=1666360 https://bugzilla.mozilla.org/show_bug.cgi?id=1666360 https://www.mozilla.org/security/advisories/mfsa2021-13/ https://www.mozilla.org/security/advisories/mfsa2021-13/