![]() These attacks are possible due to a protocol confusion vulnerability that accepts to-device messages encrypted with Megolm instead of Olm. matrix-android-sdk2 would then additionally sign such a key backup with its device key, spilling trust over to other devices trusting the matrix-android-sdk2 device. This can allow, for example, to inject the key backup secret during a self-verification, to make a targeted device start using a malicious key backup spoofed by the homeserver. Additionally, a sophisticated attacker cooperating with a malicious homeserver could employ this vulnerability to perform a targeted attack in order to send fake to-device messages appearing to originate from another user. Prior to version 1.5.1, an attacker cooperating with a malicious homeserver can construct messages that legitimately appear to have come from another person, without any indication such as a grey shield. Matrix-android-sdk2 is the Matrix SDK for Android. This attack requires coordination between a malicious home server and an attacker, so those who trust their home servers do not need a workaround. Out of caution, several other checks have been audited or added. Starting with version 19.7.0, matrix-js-sdk has been modified to only accept Olm-encrypted to-device messages. Prior to version 19.7.0, an attacker cooperating with a malicious homeserver can construct messages that legitimately appear to have come from another person, without any indication such as a grey shield. Matrix Javascript SDK is the Matrix Client-Server SDK for JavaScript. To avoid malicious backup attacks, one should not verify one's new logins using emoji/QR verifications methods until patched. matrix-ios-sdk version 0.23.19 has been modified to only accept Olm-encrypted to-device messages. Prior to version 0.23.19, an attacker cooperating with a malicious homeserver can construct messages that legitimately appear to have come from another person, without any indication such as a grey shield. Matrix iOS SDK allows developers to build iOS apps compatible with Matrix.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |