Bug 1126914 – Ocetets Truncated with Python Bindings

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Bug 1126914 - Ocetets Truncated with Python Bindings

Summary:	Ocetets Truncated with Python Bindings

Status:	CLOSED ERRATA

Aliases:	None

Product:	Red Hat Enterprise Linux 6
Classification:	Red Hat
Component:	net-snmp (Show other bugs)
Sub Component:
Version:	6.7
Hardware:	All Linux

Priority	unspecified Severity unspecified
Target Milestone:	rc
Target Release:	---
Assigned To:	Jan Safranek
QA Contact:	Dalibor Pospíšil
Docs Contact:

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Depends On:
Blocks:
	Show dependency tree / graph

Reported:	2014-08-05 11:05 EDT by kurt.frederiksen
Modified:	2015-07-22 03:22 EDT (History)
CC List:	1 user (show)

See Also:
Fixed In Version:
Doc Type:	Bug Fix
Doc Text:	Cause: Net-SNMP Python bindings did not check input string of netsnmp_set call and copied only part of the string to the outgoing SNMP SET request when the string contained character with ASCII value 0. Consequence: A Python application could send invalid SNMP SET requests Fix: The Python binding copies full string, including any '\0' characters. Result: Applications send valid SNMP SET requests.
Story Points:	---
Clone Of:
Environment:
Last Closed:	2015-07-22 03:22:55 EDT
Type:	Bug
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
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Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
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External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2015:1385	normal	SHIPPED_LIVE	Moderate: net-snmp security and bug fix update	2015-07-20 14:07:39 EDT

Groups: None (edit)

Description kurt.frederiksen 2014-08-05 11:05:59 EDT

Description of problem:
Ocetets Truncated with Python Bindings.

Version-Release number of selected component (if applicable):
net-snmp-5.5-49.el6_5.1.x86_64

How reproducible:
Use net-snmp python bindings to set a SMI object that is of the DateAndTime. Use the date and time of 01/01/2010 00:00. Observe the result on the wire. Observe that the bindings read the '00' characters as a termination character.

Steps to Reproduce:
1. Install net-snmp-python
2. Set DateAndTime object with 01/01/2010 00:00
3. Observe result.

Actual results:
01/01/2010 00:00 is seen as 0x07da0101 on the wire. Which is wrong length per the SMI for DateAndTime per the SNMPv2-TC MIB.

Expected results:
01/01/2010 00:00 should result i na set of 0x07da0101000f0000.

Additional info:
This issue has been resolved in a later version of net-snmp.  A patch which backports the fix to net-snmp-5.5-49.el6_5.1.x86_64 can be found here http://sourceforge.net/p/net-snmp/bugs/2552/ . This patch has been tested by rebuilding the redhat rpm and installing it on the system.

Comment 2 Jan Safranek 2014-08-06 07:27:47 EDT

Thanks for the report.

Just for reference, this small python snippet sends 'hello' instead of 'hello.world', where '.' should be \0 character.

import netsnmp
oid = netsnmp.Varbind('sysDescr', val='hello\000world', type='OCTETSTR')
netsnmp.snmpset(oid, Version=2, DestHost='localhost', Community='public')

Comment 6 errata-xmlrpc 2015-07-22 03:22:55 EDT

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHSA-2015-1385.html

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