PT-2016-6874 · Cisco · Cisco Ios

Published 2016-09-02 · Updated 2016-11-28 · CVE-2016-6398

Positive Technologies (AI Summary)

CVSS v3.1

5.3

Medium

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Name of the Vulnerable Software and Affected Versions Cisco IOS version 15.5(3)M

Description A vulnerability in the implementation of Point-to-Point Tunneling Protocol (PPTP) server functionality in Cisco IOS Software could allow an unauthenticated, remote attacker to access data from a packet buffer that was previously used. The vulnerability is due to the use of a previously used packet buffer whose content was not cleared from memory. An attacker could exploit this vulnerability by sending a PPTP connection request to a device that is running a vulnerable release of the affected software and is configured for PPTP server functionality. A successful exploit could allow the attacker to access up to 63 bytes of memory that were previously used for a packet and were either destined to the device or generated by the device.

Recommendations As a temporary workaround, consider disabling the PPTP server functionality until a patch is available. Restrict access to the PPTP connection request to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Information Disclosure

Weakness Enumeration

CWE-200

Related Identifiers

CVE-2016-6398

Affected Products

Cisco Ios

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2016-6398 · Security Note
• http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160902-ios · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2016-6398 · Vendor Advisory
• http://securitytracker.com/id/1036732 · Note
• http://securityfocus.com/bid/92734 · Note