Bug 1222895 – Problems decoding TLS Server Key Exchange messages

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Bug 1222895 - Problems decoding TLS Server Key Exchange messages

Summary:	Problems decoding TLS Server Key Exchange messages

Status:	CLOSED ERRATA

Aliases:	None

Product:	Red Hat Enterprise Linux 6
Classification:	Red Hat
Component:	wireshark (Show other bugs)
Sub Component:
Version:	6.9
Hardware:	Unspecified Unspecified

Priority	unspecified Severity unspecified
Target Milestone:	rc
Target Release:	---
Assigned To:	Martin Sehnoutka
QA Contact:	Jaroslav Aster
Docs Contact:

URL:
Whiteboard:
Keywords:	Patch

Duplicates:	1238674 (view as bug list)
Depends On:	1222600
Blocks:	1356054 1359261
	Show dependency tree / graph

Reported:	2015-05-19 08:03 EDT by Hubert Kario
Modified:	2017-03-21 05:54 EDT (History)
CC List:	4 users (show)

See Also:
Fixed In Version:	wireshark-1.8.10-17.el6
Doc Type:	If docs needed, set a value
Doc Text:
Story Points:	---
Clone Of:	1222600
Environment:
Last Closed:	2017-03-21 05:54:10 EDT
Type:	Bug
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

Attachments	(Terms of Use)
Add an attachment (proposed patch, testcase, etc.)

External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2017:0631	normal	SHIPPED_LIVE	Moderate: wireshark security and bug fix update	2017-03-21 08:29:55 EDT

Groups: None (edit)

Description Hubert Kario 2015-05-19 08:03:13 EDT

Description of problem:
If the connection uses TLSv1.2 the Wireshark GUI can't decode the TLS Handshake Protocol Server Key Exchange messages in ECDHE or DHE key exchange, it can do that only if the connection uses TLSv1.0.

Decoding of Server Key Exchange using the CLI tshark command always fails.

Version-Release number of selected component (if applicable):
wireshark-1.8.10-17.el6.x86_64

How reproducible:
Always

Steps to Reproduce:
1. Open wireshark load tlsv1.2-ecdhe-rsa.pcapng

1. tshark -o 'ssl.desegment_ssl_records:TRUE' -d tcp.port==4433,ssl -r /tmp/ -V tlsv1.0-dhe-rsa.pcapng | grep -A 6 'Server Key Exchange'

Actual results:
        Handshake Protocol: Server Key Exchange
            Handshake Type: Server Key Exchange (12)
            Length: 199

Expected results:
        Handshake Protocol: Server Key Exchange
            Handshake Type: Server Key Exchange (12)
            Length: 199
            EC Diffie-Hellman Server Params
                curve_type: named_curve (0x03)
                named_curve: secp256r1 (0x0017)
                Pubkey Length: 65
                pubkey:f00ba2...
etc.

Additional info:
See bug 1222600 for example packet captures

Comment 3 Martin Sehnoutka 2016-07-20 02:45:18 EDT

*** Bug 1238674 has been marked as a duplicate of this bug. ***

Comment 10 errata-xmlrpc 2017-03-21 05:54:10 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-2017-0631.html

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