Apache Activemq Client
Monthly
Denial of service in Apache ActiveMQ (Client, broker, and All distributions) before 5.19.8 and 6.x before 6.2.7 lets a remote unauthenticated attacker crash the broker by sending a crafted WireFormatInfo frame containing an oversized size value during the pre-authentication protocol negotiation. Because the size is consumed before any authentication occurs, the broker attempts a massive memory allocation, triggering an out-of-memory condition and process crash. No public exploit identified at time of analysis, and the vulnerability is not listed in CISA KEV; the fix is shipped in 6.2.7 and 5.19.8.
Out-of-memory denial of service in Apache ActiveMQ allows unauthenticated remote attackers to exhaust broker memory via rapid TLSv1.3 KeyUpdate requests. Affects ActiveMQ Client, Broker, and All distributions versions <5.19.4 and 6.0.0-6.2.3 when NIO SSL transports are used. Vulnerability arises from improper handling of TLSv1.3 handshake KeyUpdate messages, enabling clients to trigger unbounded memory allocation in the SSL engine. No public exploit identified at time of analysis. CVSS 7.5 (AV:N/AC:L/PR:N) indicates network-accessible, low-complexity attack requiring no authentication.
Denial of service in Apache ActiveMQ (Client, broker, and All distributions) before 5.19.8 and 6.x before 6.2.7 lets a remote unauthenticated attacker crash the broker by sending a crafted WireFormatInfo frame containing an oversized size value during the pre-authentication protocol negotiation. Because the size is consumed before any authentication occurs, the broker attempts a massive memory allocation, triggering an out-of-memory condition and process crash. No public exploit identified at time of analysis, and the vulnerability is not listed in CISA KEV; the fix is shipped in 6.2.7 and 5.19.8.
Out-of-memory denial of service in Apache ActiveMQ allows unauthenticated remote attackers to exhaust broker memory via rapid TLSv1.3 KeyUpdate requests. Affects ActiveMQ Client, Broker, and All distributions versions <5.19.4 and 6.0.0-6.2.3 when NIO SSL transports are used. Vulnerability arises from improper handling of TLSv1.3 handshake KeyUpdate messages, enabling clients to trigger unbounded memory allocation in the SSL engine. No public exploit identified at time of analysis. CVSS 7.5 (AV:N/AC:L/PR:N) indicates network-accessible, low-complexity attack requiring no authentication.