A vulnerability has been reported in ISC DHCP, which can be exploited by malicious people to cause a DoS (Denial of Service).
The vulnerability is caused due to the "find_length()" function in omapip/hash.c calling "log_fatal()" while handling certain requests containing a zero-length client identifier, which can be exploited to cause a DoS by sending specially crafted packages to the service.
The vulnerability is reported in versions 4.0.x and 4.1.x prior to 4.0.2-P1 and 4.1.1-P1. Versions 3.1.x are not affected.
Solution: Update to version 4.0.2-P1 and 4.1.1-P1.
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Subject: ISC DHCP "find_length()" Zero-Length Client Identifier Denial of Service
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