Cisco IOS Software TCP Denial of Service Vulnerability - Cisco Systems

high Nessus Plugin ID 49056

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Synopsis

The remote device is missing a vendor-supplied security patch

Description

Cisco IOS Software Release, 15.1(2)T is affected by a denial of service (DoS) vulnerability during the TCP establishment phase. The vulnerability could cause embryonic TCP connections to remain in a SYNRCVD or SYNSENT state. Enough embryonic TCP connections in these states could consume system resources and prevent an affected device from accepting or initiating new TCP connections, including any TCP-based remote management access to the device. No authentication is required to exploit this vulnerability. An attacker does not need to complete a three-way handshake to trigger this vulnerability;
therefore, this vulnerability can be exploited using spoofed packets.
This vulnerability may be triggered by normal network traffic. Cisco has released Cisco IOS Software Release 15.1(2)T0a to address this vulnerability.

Solution

Apply the relevant patch referenced in Cisco Security Advisory cisco-sa-20100812-tcp.

Plugin Details

Severity: High

ID: 49056

File Name: cisco-sa-20100812-tcphttp.nasl

Version: 1.18

Type: local

Family: CISCO

Published: 9/1/2010

Updated: 11/15/2018

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 2.7

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

Vulnerability Information

CPE: cpe:/o:cisco:ios

Required KB Items: Host/Cisco/IOS/Version

Exploit Ease: No known exploits are available

Patch Publication Date: 8/12/2010

Vulnerability Publication Date: 8/12/2010

Reference Information

CVE: CVE-2010-2827

BID: 42426

CISCO-SA: cisco-sa-20100812-tcp

CISCO-BUG-ID: CSCti18193

Detections

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