RHSA-2024:1495

The encrypted subject of an email message could be incorrectly and permanently assigned to an arbitrary other email message in Thunderbird's local cache.

Memory safety bugs present in Firefox 123, Firefox ESR 115.8, and Thunderbird 115.8.

An unchecked return value in TLS handshake code could have caused a potentially exploitable crash.

If an attacker could find a way to trigger a particular code path in `SafeRefPtr`, it could have triggered a crash or potentially be leveraged to achieve code execution.

`AppendEncodedAttributeValue(), ExtraSpaceNeededForAttrEncoding()` and `AppendEncodedCharacters()` could have experienced integer overflows, causing underallocation of an output buffer leading to an out of bounds write.

Return registers were overwritten which could have allowed an attacker to execute arbitrary code.

NSS was susceptible to a timing side-channel attack when performing RSA decryption.

Using a markup injection an attacker could have stolen nonce values.

A missing delay on when pointer lock was used could have allowed a malicious page to trick a user into granting permissions.

To harden ICU against exploitation, the behavior for out-of-memory conditions was changed to crash instead of attempt to continue.