CyberRota Analysis
AI-GeneratedThe vulnerability affects the rpcx library up to version 1.9.3, allowing unauthenticated attackers to exploit the gzip decompression process in the protocol.Message.Decode function. By sending a small compressed message with the compression flag set, an attacker can trigger excessive memory allocation, resulting in denial-of-service conditions and potential service outages. Organizations using rpcx should prioritize patching to mitigate this high-severity risk.
Public Exploit Signal
A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.
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Original NVD Description
rpcx through 1.9.3, fixed in commit 047aec1, contains a denial-of-service vulnerability in protocol.Message.Decode (protocol/message.go). When a message has the compression flag set, the payload is gzip-decompressed via util.Unzip with no limit on the decompressed output size. The only built-in size guard, protocol.MaxMessageLength, is checked against the compressed on-the-wire frame length, not the decompressed size, so it provides no protection. Because decoding (and decompression) occurs in readRequest before authentication, a single unauthenticated connection can send a small (under 2 MB) gzip-compressed message that expands to gigabytes of heap allocation, leading to out-of-memory conditions and service unavailability.