CVE-2021-44538: Improper Restriction of Operations within the Bounds of a Memory Buffer

The olmsessiondescribe function in Matrix libolm before 3.2.7 is vulnerable to a buffer overflow. The Olm session object represents a cryptographic channel between two parties. Therefore, its state is partially controllable by the remote party of the channel. Attackers can construct a crafted...

Matrix clients -- several vulnerabilities

Matrix developers report: Today we are releasing security updates to libolm, matrix-js-sdk, and several clients including Element Web / Desktop. Users are encouraged to upgrade as soon as possible. These releases mitigate a buffer overflow in olmsessiondescribe, a libolm debugging function used b...

matrix-js-sdk can be tricked into disclosing E2EE room keys to a participating homeserver

Impact A logic error in the room key sharing functionality of matrix-js-sdk before 12.4.1 allows a malicious Matrix homeserver† participating in an encrypted room to steal room encryption keys from affected Matrix clients participating in that room. This allows the homeserver to decrypt end-to-en...

[ASA-202109-5] element-web: information disclosure

Arch Linux Security Advisory ASA-202109-5 ========================================= Severity: High Date : 2021-09-14 CVE-ID : CVE-2021-40823 Package : element-web Type : information disclosure Remote : Yes Link : https://security.archlinux.org/AVG-2377 Summary ======= The package element-web befo...

PT-2021-22960

Name of the Vulnerable Software and Affected Versions matrix-js-sdk versions prior to 12.4.1 Element Web versions 1.8.2 and earlier Element Desktop versions 1.8.2 and earlier SchildiChat Web versions 1.7.32-sc1 and earlier SchildiChat Desktop versions 1.7.32-sc1 and earlier Cinny versions 1.2.0 a...