CyberRota Analysis
AI-GeneratedLibevent versions prior to 2.1.13 and 2.2.2-alpha are vulnerable to a heap out-of-bounds write due to improper handling of AF_UNIX peer addresses, which can lead to memory corruption. An unauthenticated local peer connecting to an AF_UNIX listener can exploit this vulnerability to overwrite adjacent memory, impacting confidentiality, integrity, and availability. Organizations using affected versions of Libevent should prioritize upgrading to the patched versions to mitigate these risks.
Public Exploit Signal
A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.
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Original NVD Description
Libevent is an event notification library. Prior to 2.1.13 and 2.2.2-alpha, libevent has a heap out-of-bounds write in bufferevent_sock.c when bufferevent_socket_set_conn_address_ copies a kernel-supplied AF_UNIX peer address into bufferevent_private.conn_address. Release builds compiled with NDEBUG disable the EVUTIL_ASSERT length guard, and the evhttp accept path can pass a 110-byte sockaddr from accept() into the 28-byte field. An unauthenticated local peer able to connect to an AF_UNIX listener can overwrite the adjacent dns_request pointer and heap data, causing memory corruption with confidentiality, integrity, and availability impact. This issue is fixed in versions 2.1.13 and 2.2.2-alpha.