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Linux admins: Dire vulnerability gives attackers root access in RHEL, CentOS, Fedora


A command injection vulnerability has been discovered in the Dynamic Host Configuration Protocol (DHCP) client included in Red Hat Enterprise Linux, which would allow a malicious actor capable of setting up a DHCP server or otherwise capable of spoofing DHCP responses on a local network to execute commands with root privileges.

The vulnerability—which is designated as CVE-2018-1111 by Red Hat—was discovered by Google engineer Felix Wilhelm, who noted that the proof-of-exploit code is small enough to fit in a tweet. Red Hat considers it a critical vulnerability, as noted in the bug report, indicating that it can be easily exploited by a remote unauthenticated attacker.

DHCP is used to assign an IP address, DNS servers, and other network configuration attributes to devices on a network. DHCP is used in both wired and wireless networks. Given that the requirements of leveraging this exploit are simply being on the same network, this vulnerability would be particularly...(continued)

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