Bug 1086668 - Login fails with "Read Error"
Summary: Login fails with "Read Error"
Status: CLOSED DUPLICATE of bug 770682
Alias: None
Product: Fedora
Classification: Fedora
Component: pidgin-sipe
Version: 20
Hardware: Unspecified
OS: Unspecified
Target Milestone: ---
Assignee: Stefan Becker
QA Contact: Fedora Extras Quality Assurance
Depends On:
TreeView+ depends on / blocked
Reported: 2014-04-11 09:32 UTC by Christian Krause
Modified: 2014-04-11 10:13 UTC (History)
1 user (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2014-04-11 10:09:17 UTC

Attachments (Terms of Use)

Description Christian Krause 2014-04-11 09:32:14 UTC
Description of problem:
Since Fedora 20, the login to Lync fails with the error message "Read Error".

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. try to connect to Lync server

Actual results:
"Read Error"

Additional info:

From http://sourceforge.net/p/sipe/wiki/Frequently%20Asked%20Questions/#after-upgrading-to-nss-3131-or-newerwzxhzdk12wzxhzdk16insert-your-favorite-linux-distribution-herewzxhzdk17-xxxwzxhzdk13windows-pidgin-2107wzxhzdk14mac-os-x-1085-109wzxhzdk15-login-fails-with-read-error :

This problem is caused by the NSS security fix for CVE-2011-3389. There is an ongoing discussion how this fix affects SSL connections to various SSL servers. Setting the environment variable NSS_SSL_CBC_RANDOM_IV=0 when running Pidgin fixes the problem:

$ pidgin


Setting the environment variable fixes the problem for me. Since that is just a workaround, I'd like to suggest to implement that workaround in the plugin itself.

Otherwise, purple-sipe is not usable out-of-the-box in F20.

Comment 1 Stefan Becker 2014-04-11 10:09:17 UTC
This can't be fixed in the plugin code, because it does not call or control NSS directly.

For the reasoning why the default for NSS_SSL_CBC_RANDOM_IV was changed for F20+ see bug 1020420.

Closing as duplicate.

*** This bug has been marked as a duplicate of bug 770682 ***

Comment 2 Stefan Becker 2014-04-11 10:13:25 UTC
Furthermore you forgot to quote the whole of http://sourceforge.net/p/sipe/wiki/Frequently%20Asked%20Questions/#after-upgrading-to-nss-3131-or-newerwzxhzdk12wzxhzdk16insert-your-favorite-linux-distribution-herewzxhzdk17-xxxwzxhzdk13windows-pidgin-2107wzxhzdk14mac-os-x-1085-109wzxhzdk15-login-fails-with-read-error :

UPDATE Oct-2013: Fedora 20 (and newer) will no longer disable the NSS BEAST security fix by default as they did in earlier releases. You will have to use the environment variable.

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