Bug 103378 - sasl server code hung up reading /dev/random
Summary: sasl server code hung up reading /dev/random
Alias: None
Product: Red Hat Raw Hide
Classification: Retired
Component: cyrus-sasl (Show other bugs)
(Show other bugs)
Version: 1.0
Hardware: All Linux
Target Milestone: ---
Assignee: Nalin Dahyabhai
QA Contact: Brian Brock
Depends On:
Blocks: CambridgeTarget
TreeView+ depends on / blocked
Reported: 2003-08-29 15:08 UTC by matti aarnio
Modified: 2007-04-18 16:57 UTC (History)
0 users

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Last Closed: 2004-05-12 02:22:44 UTC
Type: ---
Regression: ---
Mount Type: ---
Documentation: ---
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Attachments (Terms of Use)

External Trackers
Tracker ID Priority Status Summary Last Updated
Red Hat Product Errata RHEA-2004:206 normal SHIPPED_LIVE Updated cyrus-sasl packages available 2004-05-11 04:00:00 UTC

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:

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.


Note You need to log in before you can comment on or make changes to this bug.