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Bug 103378

Summary:	sasl server code hung up reading /dev/random
Product:	[Retired] Red Hat Raw Hide	Reporter:	matti aarnio <matti.aarnio>
Component:	cyrus-sasl	Assignee:	Nalin Dahyabhai <nalin>
Status:	CLOSED ERRATA	QA Contact:	Brian Brock <bbrock>
Severity:	high	Docs Contact:
Priority:	medium
Version:	1.0
Target Milestone:	---
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2004-05-12 02:22:44 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	100644

Description matti aarnio 2003-08-29 15:08:05 UTC

Description of problem:
 This is same thing as reported for  httpd  server
 at bug #103049.

 Please don't use  /dev/random  in operational authentication applications.


Version-Release number of selected component (if applicable):
 Current RawHide (or maybe couple weeks old)

How reproducible:
 Always

Steps to Reproduce:
1. Cyrus SASL server code running without any particular configuration
2. Commence authentication exchange with CRAM-MD5
3. Observe process hanging, when  /dev/random  blocks after entropy
   reservoir estimate goes to zero.
    

Actual Results:
  Server process hanging on read() of /dev/random.

Expected Results:
  Successfull authentication.
  (That can be debated about, but not hanging.)


Additional info:

  A dirty fix is what I did for bug #103049, namely cloning
  /dev/urandom  with name  /dev/random.

  It isn't kosher, nor pretty, but avoids unnecessary service tie-ups.

  The Apache (httpd-2.0) is switching to use  /dev/urandom,  why the
  Cyrus-SASL library could not do the same ?

Comment 1 Nalin Dahyabhai 2003-10-23 18:42:54 UTC

Fixing for 2.1.15-6.  Thanks!

Comment 2 John Flanagan 2004-05-12 02:22:44 UTC

An errata has been issued which should help the problem described in this bug report. 
This report is therefore being closed with a resolution of ERRATA. For more information
on the solution and/or where to find the updated files, please follow the link below. You may reopen 
this bug report if the solution does not work for you.

http://rhn.redhat.com/errata/RHEA-2004-206.html