A vulnerability was found in FreeBSD, NetBSD and Linux (Operating System) (affected version unknown) and classified as problematic. This issue affects the function mmap/shmget of the component Shared Memory. The manipulation with an unknown input leads to a denial of service vulnerability. Using CWE to declare the problem leads to CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. Impacted is availability. The summary by CVE is:

Operating systems with shared memory implementations based on BSD 4.4 code allow a user to conduct a denial of service and bypass memory limits (e.g., as specified with rlimits) using mmap or shmget to allocate memory and cause page faults.

The weakness was shared 07/15/1999 by FIRST (Website). The advisory is shared at marc.theaimsgroup.com. The identification of this vulnerability is CVE-1999-1518. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details as well as a public exploit are known. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 04/04/2019). Due to its background and reception, this vulnerability has a historic impact.

A public exploit has been developed in ANSI C. The exploit is available at securityfocus.com. It is declared as proof-of-concept.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at X-Force (2351).

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• Operating System

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• FreeBSD
• Linux
• NetBSD

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• open-source

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