Detections
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AIX 5.3 TL 8 : bos.net.tcp.client (U832257)

medium Nessus Plugin ID 46470

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Synopsis

The remote AIX host is missing a vendor-supplied security patch.

Description

The remote host is missing AIX PTF U832257, which is related to the security of the package bos.net.tcp.client.

NTP mode 7 (MODE_PRIVATE) is used by the ntpdc query and control utility. In contrast, ntpq uses NTP mode 6 (MODE_CONTROL), while routine NTP time transfers use modes 1 through 5. Upon receipt of an incorrect mode 7 request or a mode 7 error response from an address that is not listed in a 'restrict ... noquery' or 'restrict ...
ignore' segment, ntpd will reply with a mode 7 error response and log a message.

If an attacker spoofs the source address of ntpd host A in a mode 7 response packet sent to ntpd host B, both A and B will continuously send each other error responses, for as long as those packets get through.

If an attacker spoofs an address of ntpd host A in a mode 7 response packet sent to ntpd host A, then host A will respond to itself endlessly, consuming CPU and logging excessively.

Solution

Install the appropriate missing security-related fix.

See Also

http://www-01.ibm.com/support/docview.wss?uid=isg1IZ68659

Plugin Details

Severity: Medium

ID: 46470

File Name: aix_U832257.nasl

Version: 1.11

Type: local

Published: 5/19/2010

Updated: 1/4/2021

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 4.7

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

Vulnerability Information

CPE: cpe:/o:ibm:aix:5.3

Required KB Items: Host/local_checks_enabled, Host/AIX/oslevel, Host/AIX/version, Host/AIX/lslpp

Exploit Ease: No known exploits are available

Patch Publication Date: 1/25/2010

Vulnerability Publication Date: 1/25/2010

Reference Information

CVE: CVE-2009-3563

BID: 37255