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Tracking
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| Source | ID | Title |
|---|---|---|
EUVD |
EUVD-2022-6804 | matrix-android-sdk2 is the Matrix SDK for Android. 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. 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. 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. 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. These attacks are possible due to a protocol confusion vulnerability that accepts to-device messages encrypted with Megolm instead of Olm. matrix-android-sdk2 version 1.5.1 has been modified to only accept Olm-encrypted to-device messages and to stop signing backups on a successful decryption. Out of caution, several other checks have been audited or added. This attack requires coordination between a malicious home server and an attacker, so those who trust their home servers do not need a workaround. |
Github GHSA |
GHSA-fpgf-pjjv-2qgm | matrix-android-sdk2 vulnerable to Olm/Megolm protocol confusion |
Wed, 23 Apr 2025 17:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2025-04-23T16:54:40.093Z
Reserved: 2022-09-02T00:00:00.000Z
Link: CVE-2022-39248
Updated: 2024-08-03T12:00:43.445Z
Status : Modified
Published: 2022-09-28T20:15:15.667
Modified: 2024-11-21T07:17:52.300
Link: CVE-2022-39248
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OpenCVE Enrichment
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EUVD
Github GHSA