A flaw was found in the way the ClassFileParser class implementation in the Hotspot component of OpenJDK performed validation of inner class index values. A specially-crafted class file could cause a Java virtual machine to crash when loaded.
An unspecified vulnerability in Java SE related to the JSSE component could allow an unauthenticated attacker to obtain sensitive information resulting in a low confidentiality impact using unknown attack vectors.
Impact Unauthorised users can access the membership (list of members, with their display names) of a room if they know the ID of the room. The vulnerability is limited to rooms with shared history visibility. Furthermore, the unauthorised user must be using an account on a vulnerable homeserver that is in the room.
Patches Server administrators should upgrade to 1.41.1 or later.
Workarounds Administrators of servers that use a reverse proxy could, with potentially unacceptable loss of functionality, block the following endpoints: /matrix/client/r0/rooms/{roomid}/members with at query parameter /matrix/client/unstable/rooms/{roomid}/members with at query parameter
References n/a
For more information If you have any questions or comments about this advisory, e-mail us at security@matrix.org.
Impact Unauthorised users can access the name, avatar, topic and number of members of a room if they know the ID of the room. This vulnerability is limited to homeservers where: - the vulnerable homeserver is in the room; and - untrusted users are permitted to create groups (communities).
By default, only homeserver administrators can create groups. However, homeserver administrators can already access this information in the database or using the admin API. As a result, only homeservers where the configuration setting enablegroupcreation has been set to true are impacted.
Patches Server administrators should upgrade to 1.41.1 or higher.
Workarounds Server administrators can set enablegroupcreation to false in their homeserver configuration (this is the default value) to prevent creation of groups by non-administrators.
Administrators that are using a reverse proxy could, with partial loss of group functionality, block the following endpoints: /matrix/client/r0/groups/{groupid}/rooms /matrix/client/unstable/groups/{groupid}/rooms
References n/a
For more information If you have any questions or comments about this advisory, e-mail us at security@matrix.org.
Inappropriate implementation in ChromeOS Networking in Google Chrome on ChromeOS prior to 94.0.4606.54 allowed an attacker with a rogue wireless access point to to potentially carryout a wifi impersonation attack via a crafted ONC file.
An unspecified vulnerability in Java SE related to the Security component could allow an unauthenticated attacker to update, insert or delete data resulting in a low integrity impact using unknown attack vectors.
An unspecified vulnerability in Java SE related to the Security component could allow an unauthenticated attacker to update, insert or delete data resulting in a low integrity impact using unknown attack vectors.
Vulnerability in the Oracle Java SE, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: Networking). Supported versions that are affected are Oracle Java SE: 11.0.16.1, 17.0.4.1, 19; Oracle GraalVM Enterprise Edition: 20.3.7, 21.3.3 and 22.2.0. Difficult to exploit vulnerability allows unauthenticated attacker with network access via HTTP to compromise Oracle Java SE, Oracle GraalVM Enterprise Edition. Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of Oracle Java SE, Oracle GraalVM Enterprise Edition accessible data. Note: This vulnerability applies to Java deployments, typically in clients running sandboxed Java Web Start applications or sandboxed Java applets, that load and run untrusted code (e.g., code that comes from the internet) and rely on the Java sandbox for security. This vulnerability does not apply to Java deployments, typically in servers, that load and run only trusted code (e.g., code installed by an administrator). CVSS 3.1 Base Score 3.7 (Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N).
SELinux Project SELinux is vulnerable to a denial of service, caused by a use-after-free in cilresetclasspermission . By sending a specially-crafted request, a local attacker could exploit this vulnerability to cause a denial of service condition.
A flaw was found in unzip. The vulnerability occurs due to improper handling of Unicode strings, which can lead to a null pointer dereference. This flaw allows an attacker to input a specially crafted zip file, leading to a crash or code execution.