漏洞信息
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Vulnerability Title
epmd permanent DoS via EMFILE on accept(2) in erts
Vulnerability Description
Improper Handling of Exceptional Conditions vulnerability in Erlang OTP erts (epmd) allows an unauthenticated remote attacker to permanently terminate the Erlang Port Mapper Daemon (epmd) via connection slot exhaustion. The do_accept function in erts/epmd/src/epmd_srv.c calls epmd_cleanup_exit() when accept(2) returns EMFILE (per-process file descriptor limit reached) or ENFILE (system-wide file descriptor limit reached), rather than treating these as recoverable conditions. An attacker can exhaust epmd's file descriptor slots by holding many TCP connections open while periodically sending a single byte to reset the idle timeout, then causing accept(2) to return EMFILE, which kills the daemon. epmd has no per-source-IP connection cap, making the attack feasible from a single source. On Debian/Ubuntu default packaging the impact is amplified: the systemd unit inherits a low file descriptor soft limit, and repeated daemon deaths trigger systemd's start-rate-limit, permanently failing both epmd.service and epmd.socket and requiring manual operator intervention to recover. This issue affects OTP from OTP 17.0 before OTP 29.0.4, OTP 28.5.0.4 and OTP 27.3.4.15.
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Vulnerability Type
对异常条件的处理不恰当
Vulnerability Title
Erlang OTP 异常处理不当漏洞
Vulnerability Description
Erlang OTP是瑞典Erlang社区的一套构建分布式系统的中间件平台。 Erlang OTP 16.0版本和17.0版本存在安全漏洞,该漏洞源于异常条件处理不当,do_accept函数在accept返回EMFILE或ENFILE时调用epmd_cleanup_exit终止守护进程,可能导致未经验证的远程攻击者通过连接槽耗尽永久终止Erlang Port Mapper Daemon (epmd)。
CVSS Information
N/A
Vulnerability Type
N/A