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GHSA-5xwg-cfvj-gff5
com.rabbitmq/amqp-clientSummary
The max body size was enforced to patch CVE-2023-46120, but even though that limit still works, the frame size itself still exceeds the given max size.
Root cause
The Java client records the AMQP 0-9-1 frame_max negotiated during connection tuning, but the socket inbound frame reader continues to validate broker-controlled payload lengths against the much larger maxInboundMessageBodySize limit. A broker peer can therefore send a method frame whose payload is larger than the negotiated frame_max, have it allocated and decoded, and complete the connection handshake instead of being rejected as a protocol violation.
Reported by Team Atlanta.
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The vulnerability can be exploited over the network without needing physical access. It is difficult for an attacker to exploit this vulnerability and may require special conditions. An attacker does not need any special privileges or access rights. No user interaction is needed for the attacker to exploit this vulnerability.
No exploitation activity has been observed at this time. Continue routine monitoring.
The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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