In mutt and neomutt the In-Reply-To email header field is not protected by cryptographic signing which allows an attacker to reuse an unencrypted but signed email message to impersonate the original sender.
{ "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro", "binaries": [ { "binary_name": "neomutt", "binary_version": "20191207+dfsg.1-1.1ubuntu0.1~esm1" }, { "binary_name": "neomutt-dbgsym", "binary_version": "20191207+dfsg.1-1.1ubuntu0.1~esm1" } ], "priority_reason": "This is a longstanding limitation of PGP-encrypted mail and is an enhancement rather than an actual vulnerability." }
{ "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro", "binaries": [ { "binary_name": "neomutt", "binary_version": "20211029+dfsg1-1ubuntu0.1~esm1" }, { "binary_name": "neomutt-dbgsym", "binary_version": "20211029+dfsg1-1ubuntu0.1~esm1" } ], "priority_reason": "This is a longstanding limitation of PGP-encrypted mail and is an enhancement rather than an actual vulnerability." }
{ "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro", "binaries": [ { "binary_name": "neomutt", "binary_version": "20231103+dfsg1-1ubuntu0.1~esm1" }, { "binary_name": "neomutt-dbgsym", "binary_version": "20231103+dfsg1-1ubuntu0.1~esm1" } ], "priority_reason": "This is a longstanding limitation of PGP-encrypted mail and is an enhancement rather than an actual vulnerability." }
{ "availability": "No subscription required", "binaries": [ { "binary_name": "neomutt", "binary_version": "20241002+dfsg-1" }, { "binary_name": "neomutt-dbgsym", "binary_version": "20241002+dfsg-1" } ], "priority_reason": "This is a longstanding limitation of PGP-encrypted mail and is an enhancement rather than an actual vulnerability." }