A vulnerability classified as problematic was found in Arpwatch 2.1a4. Affected by this vulnerability is some unknown functionality of the file /tmp of the component Configuration Handler. The manipulation with an unknown input leads to a symlink vulnerability. The CWE definition for the vulnerability is CWE-61. The product, when opening a file or directory, does not sufficiently account for when the file is a symbolic link that resolves to a target outside of the intended control sphere. This could allow an attacker to cause the product to operate on unauthorized files. As an impact it is known to affect integrity. The summary by CVE is:

arpwatch 2.1a4 allows local users to overwrite arbitrary files via a symlink attack in some configurations.

The weakness was presented 03/12/2001 by FIRST (Website). It is possible to read the advisory at marc.theaimsgroup.com. This vulnerability is known as CVE-2001-0140. The exploitation appears to be difficult. Attacking locally is a requirement. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 61876 (Mandrake Linux Security Advisory : arpwatch (MDKSA-2001:002)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Mandriva Local Security Checks and running in the context l.

Upgrading eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (5922) and Tenable (61876). See 16520, 16522, 16523 and 16524 for similar entries.

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• Arpwatch

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• 2.1a4

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